Whyt would hot air blowi from a/c, heater and defrost setting

Asked by Jun 10, 2014 at 08:51 PM about the 2009 Mercury Grand Marquis

Question type: Maintenance & Repair

When turn on a/c or heat or defrost from Control Assembly nothing but hot air blows out of vents.  Bland door motor and actuator have been checked and Okay.  What else could be the problem.

3 Answers

20

im having the same problem..no matter what setting only hot air comes out....and from reading so many different post...its seems like this is a big issue that mecury has

2 people found this helpful.

Un plug low pressure switch pressure goes up havnt paper clip wire on two lead wire that go to that switch

220

i just got new blower motor in now it is blowing hot air before i had it instaled it was blowing cold air

3 people found this helpful.

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