Got it, thanks. I had it backwards. My thinking was that the larger cold line going into the firewall was sending cold gas or liquid to the evaporator and that cold was entering the interior of the car as air blows over the evap. Then, the smaller line leaving the firewall was the gas or liquid now warm since it had given up all it's cold to the interior of the car.

In fact it's the other way around - correct me if I'm wrong - warm liquid enters the evaporator, gets expanded which turns it cold (maybe it does this before entering the evaporator - my system has an expansion valve, not an orifice tube), the cold is sent to the interior of the car via blower, the liquid now expanded into a gas and cold gets sent to the compressor where it is compressed, which turns it hot and back into a liquid, then to the condensor where some the heat is given up...basically? Man, I'm glad I'm not a rocket scientist..

Follow Ups:

• Re: Which way does the refridgerant flow? Chris 6/03/2003 (2)
  • Chris your thermodynamics is showing - Good Job! The Prof 6/04/2003 (1)
    • Re: Thanks! Chris 6/04/2003 (0)