Was testing a heat pump on the cooling cycle today on an older home. There was no manufacturer’s plate on the unit but I would guess it was at least 15 to 20 years old. It looked like a Nordyne unit
This is a vacant house that has been vacant for about a year
I let the cooling run for about 30 minutes or more. I decided to shut down the cooling and test the emergency heat…I turned the thermostat to the “off” position… A few seconds later I turned the thermostat to the “Emergency” setting from the “Normal” setting on this older thermostat…then I turned the thermostat from “off” to “heat”…and turned the thermostat up over 80 degrees…
Buyer was outside and says he heard a muffled sound like a muffled backfire…Unit stopped working and would not re-start…Did I break this unit?