There are a number of factors that could cause your air conditioner to ice up. Depending on the issue, you may be able to fix the problem yourself. For more advanced problems, it’s vital to call an experienced technician.
You need to call a technician if your air conditioner experiences any of the following problems:
Broken or malfunctioning indoor fan motor Loose, worn, or broken fan belt Extremely dirty blower wheel Low refrigerant charge Restricted air ducts, tubes, cables, etc. Blocked capillary tubes Blocked orifices Faulty expansion valve Stuck compressor contactor Faulty thermostat Extremely dirty or damaged indoor coil
You are able to solve the following issues on your own with proper guidance and safety precautions:
Clogged or blocked air filter Blocked or closed supply and/or return vents Running air conditioner with windows open Setting the thermostat too low