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1997 Ford Explorer Temperature control issue

Tiny
KJFERGUSON
  • MEMBER
  • 1997 FORD EXPLORER
Heater problem
1997 Ford Explorer V8 Front Wheel Drive Automatic 200k miles

I just added refridgerant to my a/c system, and right after that, my temperature control stopped switching over to heat. It will only blow cold air. It was only blowing hot air before I added the refridgerant (A/C and heat both) and now it only blows cold. I could always hear it switch over when I turned the control to heat, but nothing now. Ideas?

Thanks,

Jason

updated 3/30/2010
My Explorer doesn't have any of those buttons. Mine has knobs on it.
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Tuesday, March 30th, 2010 AT 8:08 AM

2 Replies

Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
Run the self diagnostic test on it by turning the key to on, then press off and floor at the same time, then within 2 secs, press auto, If there is a problem a trouble code will appear on the display. To exit self test, press the BLUE, cooler button this also retains error codes, To erase codes and exit, press defrost, choose one of these before you power down the system. Test with engine at 120 degrees or more, and cabin between 40-90 degrees. Post any codes recorded here and I let you know what's defective.
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Tuesday, March 30th, 2010 AT 4:06 PM
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
What it sounds like is the temperature blend door is stuck, or the actuator broke.
Videos link
https://www.2carpros.com/articles/blend-door-actuator-replacement-video-1999-2007-chevrolet-silverado
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Wednesday, March 31st, 2010 AT 2:21 AM

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