Answer Dean, The first thing to check is to make sure that the fans are running. If not then test to see if they are getting power. If not then the unit is most likely stuck in defrost which the timer would need to be replaced. If they are running then check to see if the compressor is running. If it is not then the start relay more than likely failed. This would also give a clicking noise in a lot of cases while trying to start. Read More... Answered by AppliancePartsPros.com | Friday, December 12, 2014