DIY diesel heat gun repair

In detail: DIY repair of a diesel heat gun from a real master for the site my.housecope.com.

Heat guns are one of the most effective types of equipment for space heating.

And this is not surprising: after all, with the help of these heating units, you can heat a room in a fairly short period, even large ones.

This is achieved due to the fact that the principle of operation of heat guns is as follows: heat is generated in the structural unit of the unit, and then, with the help of a powerful air flow, is supplied to a given place.

The uniqueness of the principle of operation of heat guns has led to the fact that recently equipment of this type has begun to be used quite often to achieve various industrial and domestic purposes. In other words, heat guns have gained extraordinary popularity due to their technical characteristics and ease of use.

But everyone probably knows that no matter how high-quality and efficient the equipment is, sooner or later failures occur in its functioning and malfunctions may occur. In such situations, the owners of heat guns, as a rule, contact specialized service centers.

However, there is another approach for identifying and eliminating defects in the operation of heating units of this type, which lies in the fact that the repair of a heat gun can be done by hand. Therefore, this article will be devoted to how to correctly find out and troubleshoot the operation of gas and diesel heat guns.

Most often, the following structural elements can fail in a gas heat gun:

blower fan;
piezoelectric element for gas ignition;
control and protective units;
fuel supply device.

Therefore, below we will indicate what malfunctions may arise in the operation of gas heating units, as well as how they can be eliminated with our own hands:

Video (click to play).

Gas does not ignite. In this situation, as a rule, the piezoelectric element has failed. It is recommended to clean the igniter and set the gap between the electrodes. And if the problem is not solved, then it is necessary to completely replace the piezoelectric element.
Gas is connected to the heat gun, but does not enter the combustion chamber. The cause of this malfunction is a clogged burner. It is recommended to clean this element with a compressor, in other words, you need to blow through the burner with a powerful jet of air.
There is an unpleasant smell of carbon monoxide. As a rule, the appearance of this malfunction is due to the fact that a leak has appeared in the gas hoses. Therefore, in order to eliminate this defect, it is necessary to tighten the fastening clamps or cut off the ends of the hose. If this procedure does not help, then these line hoses must be replaced.

You can read an overview of suitable heat guns for a garage in this article.

Diesel heat gun malfunctions consist of the following important points:

Fuel is supplied to the combustion chamber intermittently. The appearance of this defect is primarily associated with contamination of the fuel tank and its supply system. In this case, it is recommended to drain the fuel from the tank and rinse thoroughly. Then it is necessary to purge the entire fuel system.
The fuel mixture is non-flammable. This failure is primarily associated with spark plug defects. To eliminate the malfunction, it is necessary to remove the plug, clean it mechanically, and also adjust the gap between the electrodes of this ignition element.
The heat gun began to work intermittently. This type of malfunction is associated with a clogged air filter. In such a situation, a new filter must be installed.
The heat exchanger does not heat up well due to a small flame in the combustion chamber. This defect is due to the fact that the nozzle is heavily soiled. In this case, cleaning occurs in a non-mechanical way. In other words, the nozzle is thoroughly flushed and then purged with a compressor.
The heat gun overheats during operation. This malfunction occurred because the thermostat was out of order. To eliminate the defect, you need to clean all the elements of the thermostat or, if necessary, replace them with new ones.

In conclusion, we would like to wish you that your heat gun never breaks down, and if, nevertheless, such a nuisance has happened, then following our recommendations, you can easily identify all the defects and feel free to carry out repairs yourself.

Watch a video in which an experienced user clearly demonstrates the process of repairing a gas heat gun with his own hands:

DESIGN PRESTIGE LLC has a year of foundation 1999. Employees of the company have a Moscow residence permit and are of Slavic origin, payment is made in any convenient way, if necessary, work is provided on credit.

Heat guns are designed for continuous operation for a long time, and, like any equipment for continuous operation, they require periodic maintenance and repair. Heat gun maintenance consists in cleaning them and adjusting parameters such as: air flap clearance, compressor pressure, fuel pump pressure, etc. A heat gun repair is to find faulty parts and replace them.

Consider, for example, a Master BV 110 E heat gun. This is an indirectly heated diesel heat gun with electronic flame control.

The basic structure of such a gun is quite simple. The fuel is supplied by the fuel pump to the injector, where it is sprayed into the combustion chamber. In front of the nozzle, there are two electrodes that ignite the fuel. Also, air is blown into the combustion chamber by a fan. If the gun is indirectly heated, then the combustion chamber has two independent circuits, which makes it possible not to mix heated air with combustion products.

The maintenance process of a diesel heat gun consists in cleaning the following components: fan, ignition electrodes, nozzle and diffuser and combustion chamber.

Let's transgress. Remove the cover from the back and front.

Now we have access to the fan and the rear grille. To get to the injector, we disconnect from the combustion chamber: 2 wires of the ignition electrodes (red), a photo sensor (black), a fuel line (copper tube), as well as 2 wires each from the thermal sensors on the combustion chamber. All wires are disconnected by hand, only a key is needed for the fuel line.

To remove the combustion chamber, you need to unscrew one screw in the lower front of the housing.

To remove the unit with the nozzle and diffuser, you need to unscrew the two nuts on the rear end of the combustion chamber.

Now you need to thoroughly clean the nozzle, electrode and diffuser.

The combustion chamber is non-separable, but it can also be well cleaned of soot using a compressor.

After cleaning the heat gun, it is also necessary to set the required gaps between the electrodes, as well as the gap of the air damper into the combustion chamber.

Everything. This completes the service.

When repairing heat guns of this type, the main task is to find faulty parts. What can be both an easy task, if the breakdown is of a mechanical nature, or rather nontrivial, for example, in case of malfunctions of the flame keeping system, you have to check all the elements of the control system step by step.

After identifying the faulty part, it remains to find it in the detailing and order.

Finally, a link to the channel with small videos about the repair of Master heat guns.

These products are used to heat private garages, service stations, utility and storage rooms, construction sites - where people do not live.In the event of a breakdown of diesel heat guns, it is quite possible to independently diagnose, establish the cause of the breakdown and repair the unit.

Such guns are often called fan heaters due to the similarity of the principle of operation, but they have certain differences. They work in the same way as other similar products: air flows around the combustion chamber housing with a fan and heats the room.

The principle of operation of the heat gun

The design of modern guns includes a special sensor that turns off the device when the set temperature is reached, thus achieving significant fuel savings. Garage craftsmen make guns that can run on different grades of used oil.

Factory or home-made, heaters have several very vulnerabilitiesso they need frequent repairs. This is cleaning nozzles and filters, replacing the fan and much more. To find out all the vulnerabilities, you need to study the design of such guns.

Important advice! After using the gun and setting it for long-term storage, the remaining fuel must be drained, and the tank must be thoroughly rinsed from the remaining diesel fuel. It is unsafe for the product to use fuels that have been stored for a long time.

Products with indirect heating method premises have chimneys through which all combustion products are removed, so in practice they can be used to heat living quarters. They are much safer, but they use oxygen for combustion, so ventilation or periodic ventilation is needed. Their power is lower, because losses occur through the exhaust system.

Diesel heat gun device

The product direct heating all combustion products remain in the room, so they cannot be used where people live permanently. They are used to heat construction sites and warehouses where there is a natural flow of air, because lack of ventilation can lead to carbon monoxide poisoning.

All products are equipped with powerful body made of metal: it excludes the ingress of foreign objects that can cause damage or become a source of fire. Necessarily installed fuse, which turns off the device when the case is very hot.

For circulation, use a compressor or a small pump, for pumping into the room - fan, which experts consider one of the vulnerabilities of these products. A burner and a fuel supply pipeline are located inside the housing.

The main elements of a diesel heat gun:

there is an exhaust pipe for removing smoke;
a fuel tank located at the bottom of the product;
pump or compressor driven by an electric motor.

Repairing a diesel installation can cost a user a lot, because only diagnostics cost from 1000 rubles, depending on the model. Many car enthusiasts cope on their own, diagnosing empirically or following the standard path from a simple failure to a complex case. Sometimes there are options when the product does not work normally just because it jumped off valve spring, it remains permanently closed - there is no air flow into the combustion chamber. As a result, the cannon also stalls.

This breakdown is determined simply - there is no movement of warm air. We begin a visual inspection of the motor: first, we will clean the terminals, then we will ring the motor winding using an analog tester. We also check the insulation of the winding. In some cases, in order not to waste time, it is easier to install new enginethan testing the old one.

This is a very important detail: the functionality of the entire product depends on its high-quality work, because it sprays diesel fuel in the combustion chamber, thereby ensuring complete combustion of the fuel. Injectors rarely fail, and these spare parts for diesel devices can be purchased at any heat gun store.

Sometimes the diesel cannon stops working because there is no fuel supply to the injectors due to a clogged filter. We open the case of the device, unscrew the plug, take out the filter element and rinse it in a clean kerosene... Then it can be blown off with compressed air and installed in place.

According to the statistics of all malfunctions, the fan often fails - it is he who undergoes intensive wear during the operation of the product. Reflow occurs insulation wiring or its burnout: in this case, it is not difficult to change the wires, but if mechanical stress or extreme wear is detected, then in this case the fan must be replaced.

Mostly heat guns are equipped with fans low power, therefore, it is not difficult to find a replacement for them - it is enough to visit a specialized store and choose a product based on the performance of your device.

The user must remember that all encountered failures require an individual approach, but there is nothing super complicated in the details of a diesel gun. Therefore, repairing a heat gun with your own hands is subject to any home craftsman - you just need to have the desire and a little free time.

To ensure fire safety measures, a container with a fuel supply for the product must be located at a distance of 8 meters from heating devices or any sources of open flame.Remember! Instead of diesel fuel, you cannot use gasoline of any brand: the likelihood of an explosion increases many times over, because it is more volatile.Safety measures when using guns are quite simple - you must immediately leave the room if you feel:

sudden and severe dryness in the mouth;

pain in the throat, nose, or eye area;

sudden attacks of headache;

desires of nausea.

Many people react very painfully to carbon monoxide indoors: for example, people with lung diseases or cardiac patients with anemia, pregnant women. They are contraindicated to be located where a diesel heat gun with direct heating is used. Image - DIY diesel heat gun repair

Heat guns are one of the most effective types of equipment for space heating.

And this is not surprising: after all, with the help of these heating units, it is possible to heat a room in a fairly short period, even large ones.

The uniqueness of the principle of operation of heat guns has led to the fact that recently equipment of this type has begun to be used quite often to achieve various industrial and domestic purposes. In other words, heat guns have gained unusual popularity due to their technical characteristics and ease of use.

Most often, the following structural elements can fail in a gas heat gun:

blower fan;
piezoelectric element for gas ignition;
control and protective units;
fuel supply device.

Therefore, below we will indicate what malfunctions may arise in the operation of gas heating units, as well as how they can be eliminated with our own hands:

Gas does not ignite. In this situation, as a rule, the piezoelectric element has failed. It is recommended to clean the igniter and set the gap between the electrodes. And if the problem is not solved, then it is necessary to completely replace the piezoelectric element.
Gas is connected to the heat gun, but does not enter the combustion chamber. The cause of this malfunction is a clogged burner. It is recommended to clean this element with a compressor, in other words, you need to blow through the burner with a powerful jet of air.
There is an unpleasant smell of carbon monoxide. As a rule, the appearance of this malfunction is due to the fact that a leak has appeared in the gas hoses. Therefore, in order to eliminate this defect, it is necessary to tighten the fastening clamps or cut off the ends of the hose. If this procedure does not help, then these line hoses must be replaced.

You can read an overview of suitable heat guns for a garage in this article.

Diesel heat gun malfunctions consist of the following important points:

Fuel is supplied to the combustion chamber intermittently. The appearance of this defect is primarily associated with contamination of the fuel tank and its supply system. In this case, it is recommended to drain the fuel from the tank and rinse thoroughly. Then it is necessary to purge the entire fuel system.
The fuel mixture is non-flammable. This failure is primarily associated with spark plug defects. To eliminate the malfunction, it is necessary to remove the plug, clean it mechanically, and also adjust the gap between the electrodes of this ignition element.
The heat gun began to work intermittently. This type of malfunction is associated with a clogged air filter. In such a situation, a new filter must be installed.
The heat exchanger does not heat up well due to a small flame in the combustion chamber. This defect is due to the fact that the nozzle is heavily soiled. In this case, cleaning occurs in a non-mechanical way. In other words, the nozzle is thoroughly flushed and then purged with a compressor.
The heat gun overheats during operation. This malfunction occurred because the thermostat was out of order. To eliminate the defect, you need to clean all the elements of the thermostat or, if necessary, replace them with new ones.

Watch a video in which an experienced user clearly demonstrates the process of repairing a gas heat gun with his own hands:

Important in any room comfortable temperature, but it is not always possible to provide this.

There is a use case to solve the heating problem heat gun, which runs on diesel fuel, is small in size and can be easily moved to the desired location.

Also, these devices are convenient for use in the process of construction work, for example, for space heating, where the installation of stretch ceilings takes place.

In a simplified form, the design of a heat gun is set of parts:

fan;
a heating element;
fuel tank;
frame.

Cannon operation provided due to the combustion of fuel, the heat obtained from combustion with the help of a built-in fan forms a stream of warm air that fills the space around.

However, these guns differ in the way they are heated. It happens two kinds: direct and indirect.

The differences between these methods are only in the fact that devices with a direct type of heating together with warm air enter the room and products of combustion of the fuel mixture, such as soot and smoke. Heaters, which work as an indirect type, need to be equipped special sleeve for the removal of combustion products and a chimney.

In the event of a malfunction, it is better to contact a specialist, but there are such breakdowns that you can repair yourself:

Alexander, 34 years old:

“I have my own tire service, but the premises are not heated for it. In winter, this is quite problematic, with the help of a heat gun in 20 minutes the air heats up so that I I can walk in a T-shirt... The area of the room is 38 m 2. I am satisfied with the device. "

Nikolay, 36 years old:

“I got a heat gun in my garage, it's very convenient. Noisy, however, it works a little so far, but I know that there are those that do not make much noise. Although this is not a problem for me. Garage heats up very quickly and you can turn off the heater. "

Vasily, 28 years old:

“They gave me a heat gun for a long time, but I didn’t use it, but here I bought a dacha, but the heating hasn’t been done there yet. This is where the heater came in handy. Was surprised by its effectiveness».

In addition to being a diesel heat gun very easy to use and solves problems with heating rooms of various sizes and purposes, its device is very simple. This allows you to build a heater yourself, which will cost significantly less than purchasing a ready-made device.

Learn about the device and principle of operation of a diesel heat gun from the video below:

How a diesel heat gun works - watch the video:

The need to quickly heat the room appears very often. In some cases, it is necessary to heat the garage, dry the concrete screed, warm up the shed, basement, country house. In this case, the best solution would be a heat gun - gas, diesel or electric.It is not necessary to buy a device - you can create a heat gun with your own hands.

It is difficult to find a simpler and more convenient device for heating various premises than a heat gun. This device is a structure consisting of a powerful heating element and a fan, which are located in the same case. A heat gun can quickly warm up air and distribute it just as quickly. It will take a few minutes to heat a small room, and heating a large room will not take much time.

The design of this device is quite simple, because a do-it-yourself heat gun almost never fails.... For the operation of the device, you can choose different fuels:

The effectiveness of heating the gun will depend on its power. For home use, a device with a power of 5-12 kW is sufficient. For premises of significant area, equipment with a capacity of 250-350 kW will be required.

This equipment is the safest and easiest to use. If the site is connected to the mains, then it is best to make an electric heat gun with your own hands. A homemade device can be useful both during construction and in the future for various personal needs. The very name "cannon" arose from the similarity of the round body with a combat weapon. The body can also be rectangular or square.

Manufacturing a heating device is not too expensive. To make an electric gun with your own hands, you will need:

steel body;
frame where the structure will be located;
electric fan;
heating heating element;
wires for connecting the device to the mains;
switch.

The body can be made from galvanized sheet metal or a suitable piece of pipe. For work, you will need a metal tool and a welding unit.

The body of this device may become very hot during operation. Therefore, it is necessary to choose a rather thick or heat-resistant metal. In addition, it makes sense to apply thermal insulation to metal elements.

When choosing a heating element, one must not forget that the temperature of the outgoing air will depend on the number and power of these heating elements. In this case, the fan speed will not affect the temperature, however, the faster this device rotates, the more evenly the heat is distributed throughout the room. That is, the heating element is responsible for the heating temperature, and the fan is responsible for the quality of distribution.

To reduce costs, you can use a heating element from an old iron or other device. In some cases, it makes sense to shorten the length of the gun barrel in order to increase the heating temperature. A suitable electric impeller motor can be removed from an unnecessary vacuum cleaner.

To assemble a heat gun, it is best to first draw a diagram of the electrical circuit of the heater. As a rule, they use ready-made schemes.An electric heat gun is made in the following order:

First you need to prepare the frame and body of the device.

After that, one or more heating elements must be installed in the center of the case.

Then you need to bring the power wire to them.

Having installed a fan, connect the electricity to it.

Connect the power cord, the cable from the heating elements and the fan to the control panel.

Install a protective grill on the ends of the body.

During assembly, it is imperative to insulate all wire connections. After completing the assembly, perform a test run of the heater. If it works in normal mode, without failures, then you can use the equipment as intended.

In areas where access to power supply is impossible or limited, it is optimal to make a diesel heat gun with your own hands. It is a little more difficult to make this equipment on your own, in contrast to the electrical analogue, since you will need to make two cases and use welding.Heating a room of approximately 700 m² will require about 15 liters of fuel.

The lower element in this design is the diesel fuel tank. The cannon is installed directly on top, in which there are a fan and a combustion chamber. The fuel enters the chamber, and the fan conveys the heated air. To ignite and transfer fuel, a fuel pump, a connecting hose, a nozzle and a filter will be needed. An electric motor is connected to the fan.

The combustion chamber is installed centrally at the top of the housing. This is an iron cylinder with a diameter of approximately 2 times smaller relative to the diameter of the body. The combustion products of the fuel are removed from the chamber by means of a vertically installed pipe.

The lower part must be located at a distance of at least 20 cm from the upper body. To prevent the fuel container from heating up excessively, it must be made of a material with low thermal conductivity. You can also choose an ordinary metal tank, which must be covered with a heat-insulating layer.The upper part must be made of thick metal. A piece of metal pipe will do. In the case you need to place:

fan with electric motor;

a nozzle with a fuel pump;

combustion chamber with a pipe for the removal of combustion products.

After that, the fuel pump is attached, and a metal pipe is brought to the tank, with the help of which the fuel is first supplied to the fuel filter, and then to the nozzle. Protective nets are installed along the edges of the upper case. You must first think about the power supply for the fan to work. If access to the mains is limited, you can use the rechargeable battery.

During the operation of the diesel heater, safety precautions must be observed. Even at a distance of one meter, the hot airflow can reach 450 degrees. It is not advised to use this device in confined spaces, since the products of diesel fuel combustion pose a danger to humans.

In addition to heaters that run on diesel fuel, other combustible materials are also used for cannons, for example, machine oil.

By its design, gas equipment resembles that of a diesel cannon. It also houses the combustion chamber, which is located in the housing. Instead of a container for liquid fuel, a liquefied gas cylinder is installed.

As with the use of diesel fuel, the removal of combustion products is of great importance, since it is very difficult to ensure complete combustion of the gas in home-made structures. The air entering the room heats up when it comes into contact with the combustion chamber. The burnt gas is discharged into the street using a special outlet. This indirect heating design is safer than heating with an open flame.

In order to increase heat transfer, plates are most often welded to the combustion chambers - as a rule, 5-10 pcs. Moreover, the dimensions of the combustion chamber and the plate must be less than the size of the body so that they do not touch its walls and cannot overheat.The body of a gas heating device gets very hot during operation, therefore it must be covered with a heat-insulating layer to prevent fire and burns. To assemble a gas structure, you will need:

burner;

gas cylinder;

iron body;

reducer;

frame for fixing the body;

ignition device;

fan.

The gas cylinder is connected to the reducer, thereby ensuring uniform transport of fuel to the burner. In this case, the air near the combustion chamber heats up, and the fan brings it out into the room. The assembly principle is almost the same as for a diesel heater.With a gas cannon, you can only use cylinders filled with gas on special equipment. Cylinders that are home-filled can leak.When assembling and operating a gas heater, you must adhere to certain rules:

Use a remote ignition device, as manual ignition can cause an explosion.

The gas supply pipes in the connection areas must be sealed without fail.

Do not leave the turned on device unattended for a long time.

Never use cylinders filled with a handicraft method with a gun.

Always make sure that the gas cylinder is at a sufficient distance from the heater, otherwise it will overheat and explode.

Another important point is the ratio of the dimensions of the heated room to the capacity of the gas installation. It is forbidden to install a very powerful heater in a small room, as this may cause a fire.The apparent simplicity of manufacturing a structure can be the cause of many errors. Therefore, the owner of any heat gun must adhere to certain recommendations:The effectiveness of heat guns has long been proven by their practical application: if you need to dry something or heat a room, there is no better option. Moreover, the design of this equipment is very simple, which makes it possible to independently manufacture this heater. The devices are very powerful, so you need to be very careful when using them.