I had a Trane XL16i HP installed a few months ago. Not it starts getting cold and the unit is really working in its full capacity. My understanding is that when the condenser goes into the defrosting mode, the air handler should stop blowing, but mine doesn't. So what comes out of the vent is cold air. I checked the wiring and it seems correct. Where should I start to figure out what's wrong.
Also, according to the manual, when in 1st stage, the air flow should only be at 80%. But mine seems always at 100%. There's no obvious change in air flow when the 2nd stage kicks in. Is it possible I have a back control board on the air handler?
My air handler is a matching 4TEE3F variable speed.