Chevy S-10 no heat (heater core flush)

Chevy S-10 no heat (heater core flush)

Posted in the Chevrolet S-10 Forum

Since: Nov 07

Fairbanks, AK

#1 Nov 5, 2007
Heater core Flush instructions
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1994 S10er

Butler, PA

#2 Jan 17, 2009
1994 S10 The heater only blows cool air. I just replaced thermostat, but stills blows cool air. Do you think the heater core needs flushed?

Dallas, TX

#3 Jan 30, 2009
Hey, I just had the same problem on my truck, I removed the 2 hoses going to the heater core, 1 from the water pump, and 1 that returns back to intake. I found a lot of build up in hose, and fittings, so I took a blower nozle hooked to my air compressor and blew in the hose, cover the other end with a rag, so it does not blow all over. hope this helps.

Wichita, KS

#4 Feb 3, 2009
i had a problem like that in my chevy luv. the temp control was broken in the back. the front would move but it would not move the actual control.

Butler, PA

#5 Dec 23, 2013
I have no heat issue with my 94 s-10.. I replaced the thermostat twice, flushed the heater core, flushed the radiator, does not seem to be air locked as i tried all the reccomendations for "burping" the air out of it.. I am lost at this point--any help is greatly appreciated

Columbus, OH

#6 Feb 16, 2014
I had the same problem in my 97 s10 it need up being a head gasket it was blown between 1 & 2 and was just transferring the antifreeze back and forth that's why there was no antifreeze in the oil....... Hope this helps

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