I completed a diagnostic on a Trane heat pump with a Lennox electric furnace. Upon arrival the heat pump was frozen solid. Thawed the system and restarted. Tested defrost board. Unable to get the unit into defrost mode. I gave an estimate for repairs. I also gave an estimate to replace the system. I recommend that due to the age (24 years), condition and cost of repairs that the unit be replaced. Client decided to replace the system.
