A/C will blow cold, then suddenly blow hot...where do I look to fix this problem?

Asked by May 09, 2015 at 02:01 PM about the 2001 Dodge Ram 1500

Question type: Maintenance & Repair

My '01 Ram a/c will blow cold air...and suddenly, start blowing hot.  I can fiddle with the
controls, and it will usually go back to blowing cold, but sometimes it won't until it's
been shut off for a few minutes, at least. Curiously, I can also hit a pretty good bump,
and it will stop blowing cold. When it is working as desired, it does great, but the
problem is a head scratcher.....any suggestions?

2 Answers

I know this sounds simple but check your antifreeze and make sure it's mixed properly if it is do a freon check. I recommend oil change express or whomever you trust if you cannot do this checks yourself.


I had this same problem did some research and found out that it was an hot& cold actuator that's located on the passenger side floor lower a/c box directly lower left of the glove box. Unfortunately it can't be changed unless the hold system is removed. So I plugged it out while the vehicle was stuck in the cold position unfortunately the vehicle runs cold but no heat. Quick Temporary fix, Good Luck!

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