Hi, just got a 77 280 and the only problem Iv'e found is the heater always blows warm air. When I set it to the cold side it does not change.

Thanks

Feel free to rub it in :mad:

Check to see that the wire from the shift control on the dash is connected to and actually moving mixture control valve (under/behind glove compartment)

heater control valves go bad too. Just yesterday I saw a 1977 in the junkyard and the heater control valve was not in the car and bypassed with straight heater hoses. that would give constant heat!

I've taken 2 or 3 out of 240Zs and cleaned a bunch of crap out of them and gotten them to work again. If that doesn't work, then replace.

Thanks everyone, just tore apart my interior and found a very small leak on passenger side. I'm going to replace the valve and possibly the core