Question about 1998 Chevrolet K1500

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The heater does not get hot and ac does not get cool

It is a 1998 chevrolet pick up
Someone said that it may be a relay switch. If so where is it located and what does it look like

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  • oswalt Feb 18, 2009

    Thanks for your help

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I take it it blows air, right? The heater not getting hot is most likely the heater vavle that is in line in the water hoses under the dash just before the heater core. A relay does not control this. Also check the heater core lines from the engine firewall and make sure that they are both attached to the engine. If the heater core was leaking a previous owner might have had the lines bypassed. As far as the a/c, is the compressor coming on? If so does it cycle on and off every few seconds? There is a relay to control the a/c in the engine compartmant in the relay box with all the other relays. Also a fuse for the A/C should be in the fuse panel inside the truck.

Posted on Feb 17, 2009

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