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ac problem with my 91S4

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Old 03-01-2015, 07:01 PM
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super928
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Question ac problem with my 91S4

I'M having a unusual problem. the rear ac unit blows cold but front ac is warm.
Old 03-01-2015, 07:34 PM
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Bilal928S4
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Normal condition if the heater valve is not closing.
Old 03-01-2015, 07:34 PM
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PHIL928
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This is typical of the heater valve failing. Either due to a vacuum leak in the system or the valve itself. Many people (including myself) either bypass the heater core completely, or cable tie the heater valve shut.
Old 03-01-2015, 08:22 PM
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super928
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Thanks I'll check that valve!

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Old 03-01-2015, 10:51 PM
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jeff spahn
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Originally Posted by PHIL928
This is typical of the heater valve failing. Either due to a vacuum leak in the system or the valve itself. Many people (including myself) either bypass the heater core completely, or cable tie the heater valve shut.
Unless you live somewhere it gets cold, then the only option is to fix it the right way.
Old 03-02-2015, 10:13 AM
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super928
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I live in Florida, I'll put a plastic tie on it temporarily and order a new valve.
Thanks

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