Jumpdog
Nov 13, 2013, 07:04 PM
Intertherm furnace will heat up and go cold and heat up and go cold what would be the trouble
ma0641
Nov 13, 2013, 08:17 PM
May depend on the thermostat. Is it an on /off or proportional? It may also be a stuck thermostat and a safety is tripping.
HVACPR0
Nov 15, 2013, 01:12 AM
Do you have a heat pump outside? Maybe the indoor heater is not turning on when it kicks into defrost. The air from the registers would go hot/cold/hot/cold.