Question about 1998 Chevrolet Blazer
Heater only blows cold air, changed thermostat and no change.
Try flushing the heater core there will be to rubber hoses that feed into the fire wall disconnect both of them and use a garden hose and flush from both side u could also use powder drain cleaner just run to extension hoses up act like a holding tank
Posted on Oct 26, 2012
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Posted on Jan 02, 2017
SOURCE: Heater blowing cold both sides
Does it blow warm air when you drive the car? If so its the water pump.
Could also be air in the coolant system
Also have the cylinder head pressure tested to rule out a hblown head gasket
Hope this helps
Posted on Dec 11, 2008
SOURCE: blowing cold air
I had the same problem that I just fix by flushing the heater core out with a hose. take the two hoses off the fire wall and put the water to it and let flush. my heater is putting out 150 dg. F of hot air. I'm so excited! i will stay warm now.
Posted on Feb 27, 2009
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