1994 XJS climate control not working properly
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Are you saying that heat comes out of the center vents no matter what selection is selected on the climate panel?.. defrost/no defrost? closing the slider on the center vents?
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Right selection knob; Off at 6 o'clock, Low at 7 o'clock. Med (Auto Fan) at 9 o'clock. High at 10 o"clock(not auto). 1200 o'clock defrost (full hot, high fan and auto opening of defrost to windshield, closing of floor.)
Does your AC work? Can you confirm the heater valve closes when you select AC?
Last edited by carsnplanes; 03-12-2019 at 01:18 PM.
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Fr. Rick (03-12-2019)
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May I request same documents for the climate Control for my 95 conv? Thanks. What system do the facelift models have. I found an old doc for a Delaniar but not sure if that is used on the the 95 or face-lift years.
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warrjon, my email is rblassiter@cableone.net in the USA if that matters. Thanks fpr the help and info!
Rick
Rick
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No vacuum at the heater hot water valve is normally open positron all the time heat is selected as long as AC is not selected. Selecting AC supplies vacuum to the valve thus closing it it off. So, no vacuum,... valve open. Vacuum... valve closed.
Are you saying that heat comes out of the center vents no matter what selection is selected on the climate panel?.. defrost/no defrost? closing the slider on the center vents?
Are you saying that heat comes out of the center vents no matter what selection is selected on the climate panel?.. defrost/no defrost? closing the slider on the center vents?
The following users liked this post:
Doug (03-12-2019)
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Ah, ok, gotcha...thanks for the correction. That makes sense. Is there no "econ" where cooler temp is achieved from the cooler outside air rather than engaging the AC clutch for regulation. Also, I thought just stopping the AC will "warm" the interior air rather than have to introduce actual heat to make it warmer if it's too cool during climate regulation.
Last edited by carsnplanes; 03-13-2019 at 09:00 AM.
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I know that late cars had some revised controls including, I think, an 'econ' setting (or similar wording) that cuts out the compressor
But in normal/full operating mode the idea is to refrigerate all incoming air first and then heat it as needed. This is done to dehumidify the air. That's why you don't see Jags driving around with fogged-up windows
Cheers
DD
But in normal/full operating mode the idea is to refrigerate all incoming air first and then heat it as needed. This is done to dehumidify the air. That's why you don't see Jags driving around with fogged-up windows
Cheers
DD
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Fr. Rick again. I am afraid that I gave you the wrong email address. The correct one is richardlassiter@cableone.net in USA. Please send the info via this address and I am so sorry for the confusion.
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With the '94, you should have the AC ON button at the top left--I assume you've tried that. And I assume you've checked for refrigerant in the system. What could be happening, and happens sometimes with my '92 (same basic Delanair Mk III) is that the aircon compressor clutch doesn't engage. I've found in that case, either turning the system off then on, or even better, turning it to full defrost then back to cold, kicks in the clutch. A weakening magnet is apparently the cause, if I remember rightly.
Doubtless one of the actual experts will chime in to tell you I'm quite wrong, but it does sound similar to my issue.
Doubtless one of the actual experts will chime in to tell you I'm quite wrong, but it does sound similar to my issue.
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