apply the brakes the temp switches from cold to hot?

2001 DODGE RAM
150,000 MILES
Avatar
BH81
  • MEMBER
  • 1 POST
Air conditioner works fine when traveling down the road but as soon as I apply the brakes the temp switches from cold to hot. What could this be?

As soon as I turn a/c off and begin to pull off the air is cold again. It only does this when I have to brake. I can travel down the Hwy for a long period of time and it never effects the temp.
Mar 9, 2012 at 6:34 AM
Advertisement
Avatar
DRCRANKNWRENCH1
  • ✓ASE Certified Mechanic
  • 3,435 POSTS
  • ASE Certified Mechanic
There may be some kind of electrical sensor problem that is affecting the compressor cycle.
Have the trouble codes pulled. Any Advance Auto or Auto Zone will do this for free.
If no codes come up, you should have the compressor refigerant pressure checked. Even as little as a .25 Lb off and an A/C can turn into a heater. It can also cause problems with the compressor cycling properly.
Mar 9, 2012 at 6:46 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.