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Auto Air Conditioning & Heater Repair/2001 silverado heater problem

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Expert: - 2/6/2011


Question
my 2001 chevy silverado will not blow hot air. temp. is at 200 but it only blows luke warm or cold air. I filled the truck with coolant and it did not make a difference.

Answer
Are both hoses hot going in/out to the matrix on the bulkhead. If one is hot and the other cold you have a blockage in the matrix or if you have a valve in the line, it may not be opening properly.
Is your thermostat working properly. You should have hot water hoses either side of it.

If all is good under the bonnet then the problem is in the cabin, we are a uk company so have no specialist knowledge of your vehicle and would therefore recommend taking it to the dealer to have it plugged in to the diagnostic machine.

If you can see or hear the flaps opening and closing it would be fair to assume these are working
when you ask for the airflow to move from screen to floor
If you can't hear any movement then you may have a sticking flap that will not open to allow the heat through

Hope this helps

Auto Air Conditioning & Heater Repair

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Paul Evans/ www.chillywillys.org

Expertise

Any question related to the function or malfunction of vehicle air conditioning excluding model specific problems with the heater controls. We are a UK based company and are unlikely to be familiar with the exact make and model of American vehicles. We will always at least try to guide the owner towards what the problem is likely to be in this instance We may struggle with none specific electrical issues related to the a/c without seeing it but it is likely we could narrow the problem down

Experience

Director www.chillywillys.org specialising predominantly in UK vehicles, fleet, rare and collectables. Although all a/c works on the same principal US vehicles have different controls and electrics. 12 years experience automotive and aircraft air conditioning. This is our sole source of revenue, we see lots of a/c issues that we are able to diagnose accurately mainly down to experience. UK have garages caught on to a potential revenue stream within the last few years but sometimes struggle with the problems as they don't see the issues that often........to be fair they could get their own back and ask me to change a timing belt ! Certain vehicles have known issues, we can help with that and also anything that is obvious to us but not necessarily to the bamboozled owner....... a/c is relatively new here and owners are catching on to maintenance but are sometimes still misguided by inexperienced individuals a bit timid to say' I don't really know

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