Another question someone might have an answer to, is my ac compressor supposed to turn on when I'm running only heat? I know the car was out of r12 when I got it and I also know the relay or switch on top of the condenser? On the firewall is bad. Can I just unplug that switch from the black canister and make it so the ac doesn't turn on at all? The ac is something I plan on fixing over the winter. Thanks in advance for all the help guys I really appreciate it.