A/C blowing hot and cold

TOMMT

MEMBER
2006 CHEVROLET COLORADO
5 CYL
2WD
AUTOMATIC

I replaced the resisitor and wiring harness because the switch was only running on high. It was very cold always but only on high. Now all switch positions are working, but the a/c wants to blow cold then warm then cold. It dosen't do it all the time, jus when it takes a mind to. Any ideas?

5 Replies

SATURNTECH9

MECHANIC
30,870 POSTS

So when it blows hot is the light on the a/c button lit up?

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Friday, August 19th, 2011 AT 11:22 PM

TOMMT

MEMBER
3 POSTS

Yes the a/c light is on and the recir light is on.

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Friday, August 19th, 2011 AT 11:40 PM

SATURNTECH9

MECHANIC
30,870 POSTS

Is your engine running hot when the a/c cuts out?Is your engine fan clutch working correctly?Those arent the best in the world I have seen a lot of them fail. Also have you checked the high and low pressures on your a/c?

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Saturday, August 20th, 2011 AT 12:01 AM

TOMMT

MEMBER
3 POSTS

No the engine is running hot and I believe the fan cluth is working correctly. I have not checked high and low pressure on the A/C, I guess I will have to take this thing in to the dealer

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Saturday, August 20th, 2011 AT 12:03 AM

SATURNTECH9

MECHANIC
30,870 POSTS

You have to make sure the a/c is fully charged the engine is not running too hot when the a/c blows hot. Also that the a/c condensor is not plugged up with debris not allowing enough air to come thru it. Let me know what you find out.