Bad air compressor - now heater doesn't work
Okay, I can fix most anything, but I know next to nothing about HVAC. A friends got a central air conditioning unit that the compressor went out on, which was fine as it wasn't hot. But now it's cold, and the heater will not come on either. It is not a gas heater, and I can find no elements, and am wondering if maybe this is a AC/Heat pump? If so, would replacing the compressor work? I guess that's a pretty obvious answer, but... They do not have any paperwork for the unit, nor do I know what kind it is, but am going to take apart the condensing unit so I can get to the compressor and check it out, size style, make, model. Anything I should know? Or look for?