3 ms·
My heat pump defrosts itself under its own internal control.
by amluto 3y ago
My heat pump defrosts itself under its own internal control.
- lsllc 3y agoIt just switches to cooling mode and activates the AUX heat to dump heat into the outdoor coils for a minute or two and then goes back to heating. The AUX heat is just a thermostat relay closing, so it can activate an electric-resistive coil (as is typical) or it can turn on the circulator pump for a gas fired boiler for a hydronic loop in the air handler.