Discussion Starter · #1 ·
Over a year ago, I installed a White Rodgers demand defrost board (http://www.amazon.com/dp/B006JQ368W/ref=pe_385040_30332190_TE_3p_dp_1) because I was tired of the regular board defrosting unnecessarily. With the recent snowstorm here in southeast PA, we were not home, but I noticed my home's temperature was not maintaining. I figured there was an issue with the heat pump not being dug out. When I got home, it was of course iced over pretty bad. I dug it out and pulled the cover and as you would expect, all the lines inside were frosted over. The frost sensor from the demand board was still in place on the line going to the coils, but it would not kick into defrost. I currently have it defrosting manually, but I am wondering why this would occur? There was a good 1/4" of ice/snow on all sides of the unit, and with the lines being frosted, I figured it would kick in by itself. It's always been OK until this storm, so I don't quite understand what could be going on here.