1998 Blazer Heat A/C Problem

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Apr 26, 2010 | 03:00 PM

jnardo58@hotmail.com

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1998 Blazer Heat A/C Problem

My a/c is charged and the compressor is running but all I get is heat. How do I know if it is the climate control temp switch or the door in the heater box? When I am driving you can feel the the air going from hot to cold.

Apr 26, 2010 | 03:01 PM

swartlkk

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Do either of your A/C lines get cold?

Apr 26, 2010 | 03:38 PM

jnardo58@hotmail.com

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Both are cold

Apr 26, 2010 | 09:44 PM

65longroof

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65longroof is an unknown quantity at this point

It could be that the solinoid for the temp door is not moving.

Apr 27, 2010 | 06:20 AM

swartlkk

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One A/C line should be cold, the other, quite hot... But if the air is not flowing through the A/C core in the HVAC housing, it may not get as hot because the system isn't working as hard.

I agree, it sounds like the temp door actuator (electronic actuator located on top of the HVAC housing behind the glove box - search for it) may be the likely culprit.

Apr 30, 2010 | 08:42 PM

Nizm0

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Don't mean to threadjack but I just seen this after I posted my question. I'm having the same problem, but mine is staying on heat only, not switching back and forth, I looked under the dash and cant locate exactly which one you are talking about, any more info?

nevermind, did more searching

Last edited by swartlkk; Apr 30, 2010 at 09:33 PM. Reason: **Combining Consective Posts** - Please use the EDIT feature to add information to your post if another member has yet to reply.

Apr 30, 2010 | 10:50 PM

65longroof

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From: Maple Grove, MN

You may need to remove the dash to find it. This sounds worse then it is, the dash comes out of these things pretty easy. A few screws along the top, a couple on the bottom, drop the column and tilt the dash forward....not to bad of a job. You can then see all of the actuators.