DonnieRockett
New Member
so the hot cold slider on the climate controls is completely stuck on the hot side. it will not move. i'm going to look through the online manual, but has anyone else dealt with this issue?
working through the issues on '73 Newport - AC
- Thread starter DonnieRockett
- Start date
As I recall, the heat cable goes directly to the water valve. EXCEPT on the '72 and later systems were the a/c compressor runs all of the time, even with the "OFF" button pushed.
On those systems, as I understand it, the cable is a two-piece item. Ther is a pivot point where the a/c compressor switch is located, somewhere "in the middle". I suspect that pivot is a softer metal with a dry pivot point. With time, it could become "frozen"?
No reason I can think of that a single cable, as in earlier times, could not replace the two-piece situation. Deleting the a/c compressor switch in the process?
Easy to take off the cable at the water valve and see if the cable then works. Might be that the water valve is internally corroded? Then work backward. When moving the HEAT lever toward hot, about 1/2 way in the travel, you can hear and feel a faint click, which is the compressor switch doing its thing. Have to be paying attention to hear and feel it!! But it is there.
All blend doors on the non-ATC-type system have no connection to the temperature functions, like on more current models with no water valve.
Just some thoughts and observations,
CBODY67
On those systems, as I understand it, the cable is a two-piece item. Ther is a pivot point where the a/c compressor switch is located, somewhere "in the middle". I suspect that pivot is a softer metal with a dry pivot point. With time, it could become "frozen"?
No reason I can think of that a single cable, as in earlier times, could not replace the two-piece situation. Deleting the a/c compressor switch in the process?
Easy to take off the cable at the water valve and see if the cable then works. Might be that the water valve is internally corroded? Then work backward. When moving the HEAT lever toward hot, about 1/2 way in the travel, you can hear and feel a faint click, which is the compressor switch doing its thing. Have to be paying attention to hear and feel it!! But it is there.
All blend doors on the non-ATC-type system have no connection to the temperature functions, like on more current models with no water valve.
Just some thoughts and observations,
CBODY67
Is the water valve controlled by a cable or is it controlled by vacuum like my '70?
DonnieRockett
New Member
thanks, this gives me something to look into!
DonnieRockett
New Member
found the cable in the engine compartment, worked it back and forth from there, and now the slider works! all good, just need to wait until the weather warms up to see if the AC actually works.
SuperDave
Member
Easy enough to test functionality, even during cool weather. Turn it on, look under the hood & see if the compressor clutch has engaged and spinning when engine is running. If so, touch the condenser core in front of the radiator after it runs a few minutes. Is it hot? Feel the silver pipes running into the AC evaporator box on the firewall (AFTER the expansion valve/receiver-dryer cylinder) are they cool to the touch?
There should be a pressure switch somewhere in there, it requires approximately 60psi for the compressor to engage. If the compressor doesn't kick on, could be the system is empty & dry.
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