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XJS ( X27 ) 1975 - 1996 3.6 4.0 5.3 6.0

Vents Blowing Warm Air When Set to Cold ?

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Old Mar 31, 2026 | 07:21 AM
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Default Vents Blowing Warm Air When Set to Cold ?
Hi all…only 93 XJS 4.0 warm air is flowing out of vents when I have the temp dial set to cold (blue) in manual mode. Any ideas what might be going on ?

many thanks as always….JB
 
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Old Mar 31, 2026 | 07:24 AM
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Oops…forgot to mention the fan is off so just free flowing air…thanks JB
 
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Old Mar 31, 2026 | 04:01 PM
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Have you checked the VACUUM MANIFOLD for functionality?
If it's the manifold PM me for a replacement.
Then check the vacuum solenoids down the line.
 
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