As a rule, fans are used for a long time without interruptions. As a result, certain problems arise. Breakdowns can be small or large. In this case, you need to know how to do an initial examination. After that, it will be possible to think about how to repair the fan. However, first of all, you need to familiarize yourself with the device of a conventional floor model.
Fan device
The cooling process itself is carried out thanks to the rotation of the blades. They are mounted on a special shaft. In this case, it is driven by a motor. Electric motors of various power are used, however, in design they are quite similar. In turn, the control units are very different.
Stators are used to start electric motors. The fan shaft is located on the cranks. The flanges of the models serve as a support for the contact pads. Additionally, some fans have an element such as a gearbox. Sometimes it is installed with a clamping plate for fixing.
Motor repair
The motor in the device often breaks down due to overheating. In this case, the repair of the radiator fan must begin with an initial inspection of the model. To do this, you need to disconnect the cover that holds the cap. Next, remove the protective grill. After that, unscrew the flange. On some models, this is optional.
In this situation, much depends on the design of the fan. The electric motor is fixed in the housing most often with four bolts. After disconnecting the motor, you need to inspect its contacts. If darkening is visible on them, then the problem clearly lies in it. To solve this problem, you will have to purchase a new electric motor and install it in place.
Capacitor issues
Capacitors in devices most often break due to sudden surges in voltage. Repair of the cooling fan in this situation should begin as a standard by unscrewing the cover. The motor of the device will have to be disconnected first. There is a condenser in many fans behind the central flange. In order to get to it, you will need to completely unwind the power supply.
In some cases, the crank will interfere. In this situation, the flange is first removed. The performance of the capacitor can only be checked using a tester. In this case, the resistance on the conductors is estimated. If the value on the device exceeds 50 Ohms, then the capacitor will have to be replaced.
Stator winding test
Problems with the stator winding are considered very serious. Repair of the heater fan in this situation will have to start with a direct inspection of the engine. If the stator burns out, the capacitor can also fail. If the motor contacts are not blown, then it is intact.
The next step is to test the capacitor directly using a tester. When the stator is faulty, it smokes heavily during operation. It should also be borne in mind that this element can quickly heat up. In any case, it will have to be completely changed. To do this, you need to purchase a similar product in the store.
Control Unit Repair
The control units in the fans are installed the most diverse. Most often, worm gears break in them. In this case, the repair of the fan unit should begin by removing the terminal block. Touching the electric motor is not necessary. The control unit is most often located under the central flange. In some cases, the path to it is blocked by a lining that can be removed. Further, in order to repair the fan control unit, it will be necessary to completely twist the shaft with a screwdriver.
The next step will be to immediately remove the unit. To inspect the worm gear, you will have to twist the back cover. Further, it will be possible to see the contact shaft under it. It is checked using a tester. The resistance parameter must not exceed 50 ohms. Otherwise, the control unit cannot be repaired.
Rotor replacement
The rotor breaks in the fans quite rarely. One of the reasons for this may be overheating of the electric motor. In such a situation, repair of the floor fan should begin by disconnecting the cover. The rotor is located, as a rule, on a special gasket. Sometimes it can be behind the shaft. In any case, you will have to remove the electric motor with a screwdriver.
Next, inspect the wire that comes from the rotor. If the soldering is in order, then it must be carefully disconnected. It is usually mounted on two screws. To replace the rotor, you must purchase a similar product. The gasket in this case, you can use the old one. When attaching the electric motor, make sure that it does not come into contact with the rotor.
Diffuser repair
The diffuser is an integral part of the control unit. It usually breaks due to the fact that the regulator is twisted. In this case, fan repair should be started by removing the top cover. There is no need to touch the electric motor. However, for convenience, the central flange is easiest to disconnect immediately. Otherwise, the control unit will be problematic to reinstall. After disconnecting the controller, the control unit must be removed directly.
The diffuser on it is located on the rear side. In some cases, it is mounted on a special latch. In order to get it, you just need to pry the base of the element with a knife or a screwdriver. After that, you can inspect it. Separate the diffuser very rarely. In stores, it is usually sold with the control unit.
Blade problems
The fan blades are always made of plastic. If a foreign object falls into the net during operation of the device, they can be easily damaged. In this case, DIY fan repair is very simple. There is no need to remove the back cover of the device. First of all, you should examine directly the clamp of the protective net. It is mainly held by a plastic cap. Twisting it is pretty simple with your hands. After that, it will be possible to remove the protective mesh.
The next step is to disconnect the lining that holds the blades. You can also do this without using a special tool. With severe deformation of the blades, they are easier to replace. If we talk about the low friction of the part on the grate, then you can try to fix everything manually. In this regard, plastic is sometimes amenable, and the blade can be installed in its original place without any problems.
Flange malfunctions
Flanges, as a rule, are installed in the fans plastic. If the device falls, they can easily break. In this case, the fan repair will have to start by unscrewing the back cover. If we consider simple models, then their flanges, as a rule, are located near the electric motor. However, there are modifications where they are located near the shaft. In the first case, there is no need to remove the control unit. However, you will have to twist the crank first.
Next, the worm gear is removed . After that, you will need to disconnect the switch. The flange is mounted mainly on the panel with screws. If it is severely deformed, then it is easiest to pry it with a screwdriver. However, if the damage is not serious, then it can be easily twisted. If we talk about models where the flange is installed near the control unit, then there should be done differently.
First of all, the clamp bar is released in the fan. Then the control unit is directly twisted. The next step is to remove the gasket, which is located next to the rotor. In this case, the flange must be fastened with two screws. To replace it, you will need to order a similar part from the service center.
Crank Departure
The outreach of the crank is usually accompanied by problems with the shaft. In this situation, fan repair must be started by removing the cover. Next, you need to do the stator, which is located next to the electric motor. Sometimes it can be fixed on a special platform. In any case, you need to twist the nuts with a wrench. Next, the shaft will directly be visible in the fan, under which the crank is located.
If it is deformed, then it must first be removed. Cranks are made mainly from stainless steel. Man can straighten them independently. However, this part is very small in size, and in this situation it is easier to use a vise. If this problem could not be solved independently, then you will have to contact a service center.
Speed switch failure
Damage to the speed switch is often accompanied by increased noise of the device. In this situation, repairs should begin with an inspection of the regulator. This element is located near the control unit. In order to get to it, you just need to twist the rear protective cover.
After that, it will be possible to remove the contact block, which blocks the control unit. The clamping bar in this situation can not be touched. However, depending on the design features of the model, the repair plan may vary slightly. After removing the control unit, the regulator is inspected directly.
It happens that the problem is disconnecting the conductor. In this case, the problem can be solved using a blowtorch. However, the speed switch may also burn out, and then it will have to be replaced. You can order this fan component through a service center. There is also always the opportunity to seek help from workshops.
Reviews
According to reviews, before removing the wires from the windings, it is very important to mark them so that they do not mix up when connected. You can take photos before disassembling. They will help in case of questions during assembly.
Reviews do not recommend repairing if the stator winding is broken or burned out. It is more advisable to purchase a new fan.
Owners advise timely cleaning of the device from dirt and lubricating bearings and gearbox. This will extend the life of the motor.