Help! No heat!

[drock87]

The valve is still important for you even without AC. Your AC box can't flap off and keep air from going across the heater core like the non AC box has the ability to do. To save space to fit the AC fins in the same box, I'm pretty sure there is no way to keep the air from going across the heater core before going across the AC fins. With or without AC you'll have hot air blasting on you without that bypass.

My Green wagon actually does have crisp, cold R134 AC and it couldn't get the air cold enough to overcome how hot the heater core got it. I was roasting in the summer time until I broke down and stole a valve from a parts car and put it on where I had bypassed it over the winter before.

Thanks Capt. I now remember I'd had the heat lowered one day just prior to the great freeze I think, and maybe that's why it was stuck. It's rustier than hellll and I'm thinking about just investing in a new one; they're $55 at autozone.  In the winter I tend to just leave the heat on full heat and turn the fan off when I don't need it temporarily. I see what you mean though; I'm gonna have to get a new one I think.

[carnuck]

Get the cheaper manual valve. Turn it on/off by hand and be done with it. My original works fine (lubed it while I was replacing my heater core)