Blowing cold air only

Tiny
MJM66
  • MEMBER
  • 2004 MERCURY MOUNTAINEER
Heater problem V8 All Wheel Drive Automatic 40500 miles

I bought in Oct '08. Heat worked perfect last winter. Had freon added late spring cause it was not blowing cold air. Now I set temperature to 90 and still blows cold. All vents seem to work, defrosters work, low to high speeds of blowers work, but just cold air.
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Thursday, October 15th, 2009 AT 4:58 PM

4 Replies

Tiny
RICKMAR
  • MEMBER
Hi MJM66;

Unfortunately you could possibly have a problem with your blend door actuator.
(The door is not moving in the direction to allow the air from the heater core to enter).
I has been a long time issue with both Explorers and Mountaineers. I do not know why Ford/Lincoln/Mercury has not resolved the issue over the years.
It is very expensive to repair, not for the needed replacement part but for the labor involved.
($1000 - $1200) - It is ridiculous but "absolutely" true. It is a "BIG" job.

There "is" a short cut which involves cutting a hole in your heater core box to gain access to the blend door actuator. If it was me I would do it without a doubt as long as I had a warm & dry place to do the work. As usual the cold weather is here and it is the time for all the B.S. To take place. If you are not subjected to the winter conditions or do not mind the harsh conditions and you are interested in the "quick fix" just let me know and I will get the information to you.
Sorry for the bad news.
Rick
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Sunday, November 15th, 2009 AT 11:09 AM
Tiny
BURDETTE0806
  • MEMBER
Need help with your cheap fix
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Wednesday, January 7th, 2015 AT 6:43 AM
Tiny
RYAN MALONE
  • MEMBER
Please send me your quick fix
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Tuesday, December 26th, 2017 AT 12:56 PM
Tiny
KEN
  • ADMIN
There is no quick fix for this problem and you cannot cut a hole in the heater box to make the job easier. Here is how the job is done.

https://www.2carpros.com/articles/replace-blend-door-motor

Here is how it is done on your car

Check out the diagrams (Below)

Please let us know if you need anything else to get the problem fixed.

Cheers, Ken
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Thursday, December 28th, 2017 AT 2:47 PM

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