Vent control cycles to defrost. floor and then back to vent. Any ideas?


Asked by Apr 06, 2016 at 09:58 PM about the 2007 Ford Five Hundred

Question type: Maintenance & Repair

Dual AC dash control cycles from the vent to defrost , floor and sometimes back to vent.  Other times it just gets stuck on the defroster and while blowing cold air does not cool car.

3 Answers


This HVAC system uses servos to adjust the settings, sometimes they get messed up and out of sync, you can try to get then to resend by Removing the fuses from the HVAC system and wait at least 10 minutes, then turn on the key, do not start, and reinsert the fuses, this should reset the system, if it didn't work then you will need to,take it in to a shop you trust and have the codes for the HVAC diagnosed. HTH


System did not reset. Problem continues to be a nuisance.


Then it's time to head for the shop.

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