Air Conditioner Evaporator Fan Not Working

If it s blocked then you may be able to fix it yourself.

Air conditioner evaporator fan not working.

If the fan doesn t start up at all it could be something as simple as a setting on the thermostat. Make sure that the power is turned on and that the settings are calling for cooling. A condensing unit that sits outside your house and the evaporator coil often referred to as an a coil that sits in the plenum of your furnace or air handler. Central home air conditioner service systems consist of two major components.

Here is how i troubleshoot the issue please review the. The relay board provides voltage to many components of the air conditioner including the fan motor. If the relay board isn t working properly the fan might not run. This is for documentation and reference only.

After an extended period of time you fan can break or stop working. If the compressor is running but the fan motor is not running the fan motor or the fan motor capacitor are likely at fault. Relay boards are often misdiagnosed. Air conditioner fans not working can be a sign of a frozen evaporator coil.

If both the compressor and the fan motor won t run use a multimeter to test the temperature control thermostat for continuity. The outdoor system is running however the fan is not. The evaporator coil sits inside your home within the air handler unit furnace or fan coil pulling heat and humidity from indoor air as it passes through. A filter that s not a proper fit can obstruct airflow and put more stress on your air condition fan.

If not you will need to replace it with a low voltage motor to work with the control box. If all is ok check your air filter. You will probably need to pull your air. Before replacing the board make sure you check more commonly defective parts particularly the fan motor capacitor and the fan motor itself.

If there s ice on the evaporator coil and refrigerant lines allow the ice to melt then check again to see if the fan is working. If all the settings are correct but the fan doesn t start it could be an overheated or damaged fan motor. Check to see if the motor is free and turns easily. When your air conditioner s outside fan is not working inspect the fan itself.

Any number of things could have gone wrong here but it might be that you have a grubby filter the capacitor is broken a wire burned off the blower motor is broken the fan centre is broken or the evaporator coil is filthy. Anatomy of a central home air conditioner. If the control box is working as it should then the motor of the evaporative air cooler may be the problem. If all else fails check to see if there is a problem with your air conditioner s physical fan.

Also check to make sure that it engages the high speed fan. I am not a professional my friends ac fan stop working.