Heater does not work only blows cold air?

Tiny
CASCADESKOTA
  • MEMBER
  • 2010 FORD EXPLORER
  • 4.6L
  • V8
  • 4WD
  • AUTOMATIC
  • 151,000 MILES
Heater does not work. It only blows cold air. Already checked fuses. Coolant level is fine. I removed the cowl, and it was full of dust and debris. Cleaned that. I checked for vacuum leaks, but I do not have a diagram.
I have a manual but is does not have a Vacuum diagram for the climate control system.
Saturday, July 26th, 2025 AT 11:30 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
So this car has dual temperature climate control so can I ask if both sides have no heat? Also, the blend door actuators for the temperature are electrically controlled. I would start by running the engine until warm, then check the temperature of both heater hoses. They both must be hot for the heater to work. Please go over this video and guide to help us see what is wrong.

https://www.youtube.com/watch?v=SNRb6pSwYuU

and

https://www.2carpros.com/articles/car-heater-not-working

Please go over these guides and get back to us.
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Sunday, July 27th, 2025 AT 12:17 PM

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