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No heat in my 95 ciera but heater core and radiator are flushed and working with the proper level of fluid? Blower works but it's all cold air and the heat controls inside work fine? Can you please help me, it's our only vehicle and we have a three year old! We live in Michigan and it's getting really coldout?!

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3 possible solutions
- air in the system
- thermostat stuck ( closed)
- heater valve stuck in cold position

Posted on Nov 18, 2014

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Posted on Jan 02, 2017

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SOURCE: no hot air from heater, blower runs fine

The heater in your car depends upon a flow of hot coolant going through the heater core in order to get hot air into the car. If the heater core is partially plugged, it will restrict the flow. If you have a head gasket that is putting exhaust into the cooling system, it will eventually get into the heater core. When this happens there is no coolant in the heater core to make the air warm. If the water pump vanes have corroded away the result will be very poor coolant circulation causing the heater to not blow hot air. If your car is equipped with a heater control valve that is not functioning properly, the coolant flow will be restricted. One or a combination of these factors is likely the culprit in your case.

Since you state the 2 things you ruled out, that leaves only the water pump. Is the car running hot? The thermostat may be sticking as well... but im leaning toward the pump.

Posted on Jan 21, 2009

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SOURCE: I have a 1999 Jeep

replace termastat

Posted on Dec 16, 2010

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SOURCE: I have a 02 Chevy Blazer.Heater only blows cold

Check the blend door actuator. Not sure where it is but usually right of center on the heater box, near the core. Looks like the picture below. Maybe you can trace the wires from the control panel. These actuators have a tendency to strip their gears--you may even hear it clicking as it tries to rotate the door. If not, plug it back in after you take it off to see if it will actuate. If the actuator turns, doublecheck the door to see if you can rotate it by hand. If the door is jammed, you may have to pull the whole box out to repair it. Let us know if you have more questions.


Posted on Dec 17, 2010

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Blower is only blowing vent air no heat, was working yesterday now is not.

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most likely either the vacuum line to the round ball is disconnected allowing the vacuum pressure from moving the inner levers to the heating unit of ....check your radiator fluid levels to ensure they are to specifications level ...or you may need a radiator flush to flush the heater-core as they become plugged from gunk also could be the line going into the heater has become lose you will need to get involved a bit under the dash to investigate this ....also the switch could be bad or yes by all means use a test light and see if your fuse has blown it may be as well vacuum lines under the hood has dry-rotted preventing proper vacuum to the unit

but it sounds as if you need to have the heater core flushed these are the areas in which i would start with first ...good luck and i hope this helps you

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Sound like you have a plugged heater core. But two things you need to check first
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