Repair of heat guns. Pro tips - Setafi

Heat guns (from gas to electric ones) are actively connected in the first frosts, and it is very unpleasant when the tool “dusty” from waiting breaks sharply. To reduce the risk of possible malfunctions of heat guns, it is necessary to carry out regular maintenance. It is recommended to do this even before the start of the heating season, so that the device is ready for active use.

But if the situation has already happened - the gun is out of order - what to do? In our review, we will tell you how to repair diesel guns without involving a master.

Why does a diesel or gas heat gun not start?

There are many reasons, but we will point out the most common ones.

When the device is turned on, there is no flame and no heat. There may be several options: the tubular heater has broken, poor contact with the spark plug, the nozzle is clogged, and other points.

The diesel gun does not start. The following scenario is possible:

• tank without fuel;
• both in the diesel engine and in the tank itself, excess liquid;
• supercharger pressure not adjusted;
• filters have not been cleaned for a long time;
• electrodes corroded with rust during long-term storage;
• there is no voltage between the sensor and the board;
• the wires are not connected to the electrode;
• breakage of the transformer;
• thermostats are out of order.

Repair of a diesel thermal gun can be carried out independently if the problem is minor. In case of more serious outcomes, we strongly recommend that you contact the service center, where you will be provided with professional advice and the master will repair the heat gun quickly and efficiently.

If you want to save money or just like to fix everything yourself, the information below will be very useful for you.

How a heat gun works - before you start repairs

Structurally, modern devices have thermoregulation sensors that turn off the equipment when the set temperature is reached. This saves fuel/electricity, especially when you can't keep an eye on the heater all day. The principle of operation is extremely simple - when fuel is supplied to the system and the device is connected, fuel burns out and a heat flow is supplied from a large nozzle. This device is not recommended for installation in residential areas, as the decay products of the fuel will have nowhere to go but into the room. Garage DIYers have even come up with a car that runs on recycled engine oil - what technology has come to!

Repair of a heat gun is often required for factory models, since you don’t know exactly where its vulnerabilities are. With a home-made one, everything is much simpler - you know in advance what the device was assembled from, and you can quickly find a replacement part. However, cleaning the filters and nozzles has not prevented any device yet - do it regularly (cleaning the nozzles and filters, replacing the fan, and much more).

Important advice! After the end of the heating season, all fuel is drained from the tank, and inside it is washed with water or a cleaning solution. It is extremely dangerous and inefficient to use fuel that has been lying for a long time!

Variants with indirect heating differ in that they have a chimney in the design, so they are perfect for a residential building. All guns use oxygen as a substance for a chemical heating reaction, so without a ventilation system, well, just nowhere. Of course, their power is lower than standard, but you can already put it in the house without problems.

Also, if you are a great master inventor, you can take up the conversion of a direct heating gun into an indirect one. Very useful and budget friendly.

Diesel heat gun repair

As mentioned earlier, all diesel appliances are direct heating, that is, they cannot be used in the house. However, such equipment has a lot of advantages - use in a garage or on a construction site, where cold time is not something that the brick sticks to your hands, but all the electronics refuse to work, very productive.

The whole system is "packed" in a durable metal case. Also, a fuse is installed in all devices in order to turn off the entire system in case of sudden overheating. Therefore, the adjustment of a diesel heat gun primarily depends on the correct setting of the fuse.

A small pump is used as a way to circulate heated air, and it is blown out of the nozzle by a fan, which is considered one of the most vulnerable areas. The burner, tank and pipeline are located inside.

The main elements of each diesel device:

• exhaust pipe for smoke removal;
• in the lower part of the heat gun there is a tank for diesel fuel;
• compressor with a drive to accelerate the apparatus.

Repairing diesel guns often costs a lot of money. Take at least diagnostics in a professional service - at least a thousand rubles. Many operate by trial and error - until the equipment is repaired or its complete failure. Then just buy a new one.

Diesel gun repair - highlights

For example, your diesel gun goes out. There is a high probability that the device is working, but the problem is that the spring has come off valve and it is now permanently closed - the compressor simply cannot bring air into the system, and the diesel stalls.

Detecting a malfunction is very simple - if warm air does not move through the machine, then the device is faulty. First, we do a visual inspection: we clean the terminals and go through the contacts with a tester. We also check the insulation of all wires. Some situations do not allow you to simply fix the valve and start the device again. You have to replace the engine, which costs a lot of money.

This part is the main one in the design of the thermal gun: the combustion temperature of diesel fuel and its heat transfer depend on the productivity of the part.

Nozzles are a rare occurrence in the breakdown of a gun, but it can be replaced without problems. Tool stores are always full of such consumables, there will be no problems with this.

The most common problem is that the diesel gun does not start because the nozzle filter is clogged. To fix the problem, open the housing cover, unscrew the valve and take out the filter. It must be washed thoroughly in pure kerosene, after which it is blown under the compressor for more processing, and then inserted back into the system.

Users also complain that the main problem of a diesel gun lies in the weakness of the fan - it is this part that suffers the most, since it takes a lot of work.

It may also be that the wiring suddenly melted or completely burned out. Such a breakdown must be found even before the start of the heating season, since it does not occur in a couple of days. Some contact was damaged during storage and needs to be replaced. And if you forgot to check and got a burned out fan, just go to the store and buy a new one.

Since heat guns have small motors in terms of power, replacing them is not difficult - first look at the technical data sheet of the machine and buy a new one in the store or order through Internet.

And what "sores" did your thermal gun suffer from? Tell me in detail in the comments!