confusatron

Yes, that sounds like the part. Swapping the 2 vacuum lines(hoses) won't work. You need to disconnect the electrical connecter and put an ohmeter across the solenoid terminals. If it is open(high ohms) as I suspect, then the solenoid is shot and needs replacing. As a temporary fix and to check the valve and heater core you could plug the two vacuum hoses together somehow and that should open the valve and allow hot water into the heater core.

Hey thanks again! I spliced the two vacuum lines together with electrical tape and a heat gun. INSTANT HEAT! Awesome. So I guess my heater core and climate control are fine. I still think its retarded that the A/C comes on when I hit the front defrost button, but oh well, nothing's perfect. Thanks again bess! :D

My heat blows cold too. I tried swapping those two vacuum lines, but nothing changed. I think the valve might be bad, but I don't have a multimeter handy to test it at this time. They said the heater core is 16 hours labor to change out because they have to remove the entire engine to get at it. Is that true?

Also, as soon as I press the front defrost button, the A/C lights up, and the vents open up to outside air. That makes absolutely no sense to me. Is that normal, or is my climate control just FUBAR?

Oh, and I just read the last 2 posts now, I will go get a hose joiner and try that method. Thanks.