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1965 AC Questions

Hi Bill,

Myself and another guy are scratching our heads over the climate control system in our 65's. My A/C will blow ice cold, if I hot wire the compressor or manually push in the thermostatic switch. With the key on, the thermo switch has power at the green lead. With the car running, the black lead on the thermo switch shows power and the clutch engages, when I manually press in the thermo switch. Problem is, there is no vacuum on the black/yellow vacuum line that comes out of the wheel to the thermostatic actuator. It doesn't matter what setting my climate control is set on, there's never any vacuum to the hose that attaches to the thermostatic actuator. I can slide my climate control from left to right and nothing changes, no A/C, no change in vents (RL-R-L) and no heat. I have strong vacuum in the cabin, even at the climate controls, but it seems like the system is stuck on vent. Blower switch works on all speeds, but that's it. Is it possible that the "wheel" is clogged or faulty, not changing the functions? I understand there is a capillary tube that senses temps, but these seems like something else.

Thanks in advance!

Brandon

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Greetings Brandon -

Some of these controls can be difficult to diagnose. If I am understanding you correctly it appears that your controls are faulty or some of the vacuum lines are not plugged into the correct inlets. Therefore your first step should be to inspect all of the ac/heat vacuum lines to find out if they are routed correctly using the service manual. If you are satisfied that they are, the switch should be tested for faults. We can perform these tests for you. If any vacuum diagrams etc. are needed, we can make these available for you as well. Let us know what is needed.

Sincerely,

Bill

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Bill -

Thank you for such a quick reply. I had removed the entire dash to have the pad restored and during installation each vacuum line was plugged into the corresponding color on the wheel. We also verified each color with the manual and tested the vacuum to make sure there was plenty of vacuum coming to the control. All other vacuum components both under the hood and in the cabin are in good working order, except for the climate control. I've purchased a replacement control unit, since nothing changes as I slide the selector over. Before installation of the replacement control I think it might be a good idea to have it tested, prior to installation. I do not enjoy taking these dashes apart, so I'd definitely like to know the components are good, before installation. To have you guys test the replacement control, how long would you need the unit and how much do you charge to test? Would I ship to the address within this email?

Thanks again!

Brandon

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Hi Brandon,

Once it arrives here we would have it tested in a day or two and a message back to you ASAP. You should send both units to verify the status for future use of the faulty one. We would need the complete control assembly without the Faceplate and Indicator Needle as they are VERY fragile. Call George at Lincoln Land (727-446-2193) for Shipping information and further details.

Sincerely,

Bill