Friday, December 30, 2011

Car heater blowing warm, but not hot air?

Chevrolet Silverado 2500 blows warn air on both drivers and passenger side.But this air is not very hot.Previously it was very hot air.
In this case first inspect the Antifreeze level.If its low,then get it refilled to required level.
Other possibility can be faulty thermostat,there are two check both thermostats.
But if this possibilities are already been inspected or replaced.
Then try this,Take the heater hoses off at the firewall, use a pressure washer to flush both ways to the heater core to remove any coating on the inside left by the dexcool.

But if still the problem is same,then heater core is faulty and needs to be replaced.
This will help.Thanks.
See below for list of more solved problems :------

All types of car overheating problems and troubleshooting?

Engine Overheats and heater blowing cold?

Car overheats and Air blows hot at idle?

For Instructions regarding All types of car heater problem repairs.

All types of Car heater Problem troubleshooting?

Blower only blows warm air ?


AC cool air enters only the passenger compartment even with the heat control turn all the way?


Saturn Car Blower motor Only works on High?


No hot air from defrost vents?


Radiator replaced but still Car is over heating?


Ford ranger heater blows cold air?



  1. my 2004 volvo,s40 1.9 with turbo. my ac,heater,defroster.andblower moter do not work

  2. I had no heater on transit connect. So I put a thermostat in, a new rad, a new matrix and new water pump but still nothing. I changed the egv water cooler today and now have heating but not hot just warm. I only get warm air if I'm flat out, but when going slow it blows cold. Anyone help?????

  3. Make sure the compressor is ok. Check it up by a technician.

    Heating and Cooling Toronto

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  5. This comment has been removed by the author.

  6. Actually the article is very practical. Thank you!
    Transport fans