Air conditioning / heater core question
I have a 1996 SE Bonneville with the regular manual type of HVAC. It does not blow very cold air when in the a/c mode. It is adequetely but that is about all I can say about it.
My question is this. What controls the flow of engine coolant water to the heater core? I would immagine that it must be shut off when you want to use your a/c. In the old days, there was a vacuum actuated valve that would stop the flow of coolant. Is there an equivelant device on my 96 Bonneville?
Thanks for your help