Did the methods we introduced to you in our earlier article help you diagnose the problem with your faulty air conditioner fan? If you’re still confused and trying to find out the reason for this issue, fret not. We’ll take you through the remaining few causes of this phenomenon in this next article before you call your aircon repair Singapore service. Defective Dual Shaft Fan Motor The dual shaft fan motor or the circulation fan motor may occasionally run into issues. It consists of two blades, one on either side of the motor. On one side, the blade operates by taking in the external air over the condensing coil. This allows the unit to successfully dissipate the heat. On the other hand, the other blade functions by channelling the air over the evaporator coil. The dual shaft or circulation fan motor comprises bearings that can bind or loosen from regular usage. It’s simple to check whether the bearings are defective: you only need to shake the motor shaft. If this shaft is loose or refuses to turn, it means that you should replace it. Problematic Main Control and Relay Boards These boards are in charge of supplying power and voltage to various components of the air conditioner unit. One of the parts includes the fan motor. If the boards run into issues, they will not function. Before you consider changing out these boards, ensure that you’ve completely run through other potential problems first, like broken fan motor capacitors or even the fan motor itself. If you’ve checked through and they are not the source of the problem, you can go ahead to engage an aircon repair service to replace the boards. Broken Blower Motor You can determine if the blower motor is broken by checking for any odd activity inside the fan blades. If they don’t spin freely, it’s a sign that you should replace them. You should also check that the power is being supplied to the blower motor. If the motor receives power but is still insufficient for it to run, it means that it has to be replaced. A broken or defective blower motor is impossible to repair. This means that you need to replace it with a new unit completely. Faulty Rotary Switch The air conditioner’s rotary switch is responsible for triggering the fan motor. As time passes, the electrical contacts inside can gradually become closer to each other and compressed. This may lead to a failure to conduct electricity. You can use a multimeter to check whether the rotary switch needs to be changed. Burnt-out Temperature Control Thermostat Your air conditioner’s temperature control thermostat usually has various electrical contacts that can burn or fizzle out over time. If this happens, the thermostat will stop operating. If the compressor is turned on, the fan motor needs to be constantly running. If the compressor is functioning but the fan motor isn’t, it signals that the capacitor may require repairs. If both components don’t run at all, you can use a multimeter to check whether the temperature control thermostat is running.