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rpmdiag, Tech and Instructor
Category: Mercury
Satisfied Customers: 8048
Experience:  Since 1975
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2005 grand marquis: air conditioner is only blowing from defrost

Resolved Question:

I have a mercury 2005 grand marquis air conditioner is only blowing from defrost. What could this be?
Submitted: 5 years ago.
Category: Mercury
Expert:  rpmdiag replied 5 years ago.

rpmdiag :

Thanks for your question. Sorry you're having car problems, I will do my best to research this and supply you with an accurate answer ASAP. The vent blend door in the heater box under the dash is either stuck or broken, that's what causes that to happen. Hope this helps you. Thanks, Ron


The problem lied with the climate control module - had to replace. Vent blend doors are fine.

rpmdiag :

I see, thanks for the info. Ron

rpmdiag and 5 other Mercury Specialists are ready to help you
Expert:  rpmdiag replied 5 years ago.
Thanks, and let me know if you have any more questions. Ron