passengers side air condition changes to heat when it rains

Asked by Aug 04, 2014 at 06:43 PM about the 2003 Ford Thunderbird

Question type: Maintenance & Repair

When air conditioning is on , when it rains the passenger side heat comes on . It also
seems to lose cfms. Why?

2 Answers

58,535

Check for vacume leak,s under dash.

4,495

I am not an air conditioning man but I would think if there were a vacuum leak that the system would be the same on both sides. one line controls the dash system vents. I don't see how rain affects it but you may need to have the system recharged but rain doesn't seem to fit the problem.

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