Jon for Model Number whirlpool ar1800xa1 This old in wall unit gets cold and runs for 30-60 minutes then the fan begins so slow until it stops and just hums loudly. I tried replacing the run capacitor with no change. I'm afraid to let it go for more than a few minutes because the noise sounds pretty bad. I haven't uninstalled the unit to clean the condenser but I did clean the evaporator. Could this just be a bad thermostat? Thanks
Answer Hello Jon, This is most likely a failing fan motor. When it heats up, the bearings expand and seize the motor. I'm sorry but this part 1183429 has been discontinued by the manufacturer and no satisfactory substitutions have been provided. Thank you for your patience and understanding in this matter. Read More... Answered by AppliancePartsPros.com | Tuesday, July 2, 2019