I went to check a Goodman heat pump in Virginia. Customer complaint was she would set the thermostat for 62 and when she would come home from work the thermostat and temp was reading 80 and still running. I checked the low voltage at the outdoor unit and the thermostat was still calling for heat. I noticed and added on time delay relay on the condensor. I changed the thermostat out with a new honeywell progamable one. 4 days later the customer is calling back saying its still running she has it set for 62 and its 77, any ideas? thanks fellas in advance.