Does fan run during defrost cycle?
Likewise, does condenser fan run in defrost mode?
It is normal for the outdoor fan to run while the outdoor unit compressor is running AND the system is in heating mode, not in defrost mode. When your heat pump is in heating the outdoor unit (compressor condenser) is extracting heat from (even chilly) outdoor air.
Furthermore, what happens during defrost cycle? The defrost cycle can occur when the temperature of the outdoor coil drops below 32Â°. The system automatically switches itself to the cooling cycle to increase the temperature of the outdoor coil. You may hear the sound of the reversing valve switching the system from heating to cooling.
In respect to this, how long should heat pump stay in defrost mode?
A typical heat pump will go into defrost every 30, 60, or 90 minutes if the outdoor coil temperature stays below setpoint (~31° F). MacFarland's system goes into defrost mode only when necessary.
How often should HVAC defrost?
There are timers built in to the computer control of the unit that restrict how often defrosting can occur. Generally a unit must run for a minimum of around 35 minutes after starting up before completing its first defrost. From there defrosts should occur no more frequently than approximately every 35 minutes.