Thanks for your reply. I am not sure where to find the model number. The number on the orig. receipt is 3243D901 for the heat pump unit. We have only lived here for 2yrs, bought it from the bank, but the orig. owner left all the paper work. There was/is now way I am going to pay them for the service...

Hello, the first part of Janurary my heat pump would only heat my house to 64 dg. My repair man said the defrost unit had gone out and replaced it about a week later. After he installed it the heater would not turn off, we had to turn off the circuit breaker to shut it down. They came out the next d...