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you must have low coolant or a bad heater core
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∙ 15y ago
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On your 2001 Chevy blazer it takes 10 minutes driving before the defrost or heater blows hot air then when slowing down it starts to blow cold air and when taking off again it blows hot Any suggestion?
thermostat is stuck open.
How do you determine why a 1999 Chevy Blazer just blows out cold?
I have a 1999 blazer. The heater core clogs up about once a year from the Dexcool. Try having it (heater core) flushed and use Prestone (Extended life) instead of Texaco.
Why would a 2001 Chevy Blazer heater only blow cold air?
Low coolant in the system. Defective heater control valve. Clogged heater core.
What is wrong with your heater on your 2001 mercury grand marquis if it only blows cold air?
You are likely in an antarctic region.
1996 vw sharan heater blows cold cabin hot?
can you please clarify what you mean, do you mean that the front heater blows cold but the rear blows hot or do you mean that when the heating is on cold it blows hot? many thanks paul
My 2001 Chevy blazer will only blow cold air what can you do to trouble shoot what repair must be made?
My 2001 Chevy Blazer was blowing cold air when I had the heat on. My husband flushed the line to the heater core and a bunch of junk came out and now my heat works great. My 2001 Chevy Blazer was blowing cold air when I had the heat on. My husband flushed the line to the heater core and a bunch of junk came out and now my heat works great.
Why would a heater on a 2001 Chevy Blazer blow cold air if the thermostat was just replaced?
The heater valve could be failing to open for one reason or another.
2004 Chevy blazer blows only cold air?
It could be the actuator that diverts the air through the heater core. Our enthusiasts forum may be able to help you more at www.trailvoy.com
If the heater works but blows cold air and heater core is good what do i check next?
Get the air out of your heater core.
Why does my 2001 Chevy Prism heater blows hot air on highest fan speed but the lower speeds it blows cold air?
It has a bad "Blower Motor Resistor" The fan switch itself is fine.
Ac works but heater blows cold air?
heater hoses might have been disconected
Why would your heat only work on defrost?
ihave a 1986 chevette that when i turn defrost on it blows out heat and when i put heater on it blows out only cold air? ihave a 1986 chevette that when i turn defrost on it blows out heat and when i put heater on it blows out only cold air?
