Very Cold Vent Air (56 degrees) during Defrost Even though Heat Strips are On
I have a new Trane XL-15 3.5 ton heat pump. It works fine except during defrost.
When conditions are: 65 degrees inside; 30 degrees outsid; during 8 minute defrost cycle, vent air is 56 degrees! 10KW Heat strips are on because I monitored at air handler and meter said 40 amps during entire 8 minutes.
Likewise when conditions are 69 inside; 41 outside, vent air is 63 degrees - better but seems cold. Heat strips were on for this too.