Heating AC and Engine Cooling
Chevy Blazer
Thermostats
Heating Ventilating and Air Conditioning

If you replaced the thermostat but the heater does not work and the air conditioner fan keeps working although not in use what could be wrong?

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2015-07-16 18:25:53
2015-07-16 18:25:53

Try taking the car in for a rad flush. You may have a restriction. Check also that the hoses are not kinked, block heater and rad.

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The rear air conditioner unit has a thermostat that is malfunctioning and needs replaced.


thermostat setting /very low gas pressure or compressor not working.


If a thermostat is not working properly, you cannot calibrate it. It must be replaced.


I replaced my thermostat recently. Try Askarepairtech.com. They have lots of them and they have good pricing. Give them a look.


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I have a 2000 zx2 and it has a thermostat, if that is your question. Having said that, my heater quit working and it turned out to be the cable came loose under the dash on the left side of the radio. At first I thought it was the thermostat but was wrong. Duct taped the cable in place and the control and heater started working fine again.


Your air conditioner blower may have stopped working because the blower motor isn't working. You can replace the blower or replace the air conditioner.


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NEED to know what you are working on.



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if you have heat and and it is working OK. and if you squeeze the lower radiator return hose and feel water flowing. most likely it is the electronic fan not coming on.


Yes, If the thermostat isn't working, It cant tell the heat to come on. Thermostat is the brain of a heating & cooling system. Most likely the thermostat itself has worn out and does need to be replaced. You can get another digital one or you can change to an older style if you so desire.


It could be a blocked heater core if your fan works... Or it could be your thermostat... I have an 03 that is doing the same thing. I just replaced the thermostat and it is still doing it. There is a site called BlazerForum.com you may get some better answers there


can a faluty thermostat affect your central ac working?




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