When a car's stove fails, the fan motor is often the cause. You can detect such a malfunction by the characteristic sounds that occur when you try to turn on the heater.
Examination
To make sure that it is the motor that is the cause of the heating system malfunction, a simple but indicative procedure should be carried out:
- Start the car;
- Turn on the first, second and third speeds of the stove alternately;
- In the absence of sounds demonstrating the start of the fan, the motor is out of order;
- If the fan did not turn on at 1 and 2 speed modes, but started working at 3, then a switch or an additional resistor may be the cause of the problem.
Breakdown reasons
The motor may not work for several reasons. Each of them requires separate consideration. Therefore, we suggest that you familiarize yourself with the possible reasons for the fan failure in our table.
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Cause |
It's important to know |
|
Blown fuse |
The fuse F7 with a voltage of 30A is responsible for the stove. Replacing it is not difficult, but the main problem lies in the possible occurrence of a short circuit. This fuse is responsible for the lighting in the glove compartment, headlight washer, cigarette lighter, heated mirrors. In the event of a malfunction, all specified devices will stop working. |
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There is no contact in the mounting block |
This is a common problem in cars that results from oxidation of contacts or loss of bond strength. |
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Ignition relay sticks |
The heater turns on only after the vehicle has warmed up. Therefore, it is recommended to check the status of the ignition relay in the event of an inoperative fan. Replace relay if necessary |
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The stove turns on only at 3 speeds |
1 and 2 speeds are switched on due to an additional resistor, and in mode 3, the current goes directly to the motor. In this situation, replace the additional resistor or check its contacts. |
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The stove switch is broken |
Here we are talking about problems with an electrical target or fuse. To check their condition, you can use the control lamp |
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Problems in the design of the motor |
If everything is fine with the switch and the current, but the fan does not respond, you should check the level of overheating of the motor, its contacts with ground or brushes for sticking |
Depending on the trouble you are experiencing, you may need to replace the fan. Changing the motor is not difficult, although for this you need to have a certain skill or at least minimal experience in working with the electrical equipment of your car.
The first step when replacing the stove motor is to disconnect the battery.
Replacement
It is not difficult to change a failed unit. Follow certain rules and sequence of your actions in order to achieve the desired result.
- Disconnect the negative terminal from the battery.
- Raise the hood and, in the engine compartment, disconnect all fastening bolts that hold the plastic trim.
- For the time being, the cover can be removed to the side, so that it does not interfere with the work.
- Remove the sealing gum, which also has its place in the engine compartment.
- Remove the protective cover of your heater motor. So you got to the object you were looking for and you can start replacing.
- There are two bolts on the sides of the motor that hold your fan in place.
- Now go to the salon, remove the panel from the driver's side. There is a positive plug, which must be disconnected.
- Next, look for the negative wire. It is held in place by one nut, which must be unscrewed.
- The disconnected wires are inserted into the hole in your car body, passing through the rubber band.
- Remove the damaged motor. To do this, it must be turned and pulled out through the right side.
Follow the reverse assembly sequence carefully to avoid mistakes that could lead to even more serious problems.
As you can see, removing the device is not difficult. After examining the state of the fan motor, we can conclude that it needs to be replaced. Sometimes car owners get by with a simple repair of brushes or replacing fuses.
The price of the issue
The price depends on whether you buy a motor complete with a housing or separately.
The motor itself will cost you about 500 rubles, and you will have to pay about 1000 rubles for the assembled device. Which option is preferable for you, decide for yourself.
