Thread: 91 calais low heater output
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Old 03-18-2006, 12:10 PM   #2
GTP Dad
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Re: 91 calais low heater output
Check the car for a vacuum leak. The vents are controlled by vacuum and if the line breaks it won't work properly. You may also want to check the vacuum control module under the dash that opens and closes the vents. This can go bad too.
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