1999 Chevy Blazer Hot and Cold

Tiny
KAT_E_Q
  • MEMBER
  • 1999 CHEVROLET BLAZER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 135,754 MILES
My car is blowing HOT air for a few seconds then it blows cold air for a few seconds and then back to hot when the air conditioner is on. I tried turning the nob from HOT to COLD slowly, thinking that it maybe wasn't tripping the sensor, but that did not work. I have made sure that there is not a freon leak in the A/C system and that the level is full. Does this sound like a problem with the temperature sensor?

I also am having a problem with what I think is the electrical system. The button to open the hatch in the back is no longer working, and the automatic door locks are also not working from inside the car (I have to use the remote to lock and unlock the doors). I checked the fuses and it doesn't seem to be that.
Wednesday, April 14th, 2010 AT 12:33 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,164 POSTS
As far as the AC, have the blend air door checked. It determines if you get AC or heat. If it isn't working properly, this would be the result.

As far as the locks, have you checked to see if there is power to the switch on the driver's door?
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Thursday, April 15th, 2010 AT 10:29 PM

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