Question about 2003 Buick LeSabre

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2005 Buick Allure heat problem

My heater just blows warm air, i changed thermostat but no differance

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  • Anonymous Mar 23, 2014

    When I turn the heater on in my car, the air doesn't warm up, but the engine heats up

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  • 32 Answers

Well if u changed thermosta did u noticed if both were same & had little hole on top of the old 1 lot of times aftermarket dont have them & u need to drill 1 urself same spot....or could b heater core going out

Posted on Dec 18, 2008

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Posted on Jan 02, 2017

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I changed thermostat on 2005 buick rendevous ultra 3.6l. still have no heat. whats next?


Was lack of heat in the cabin the only reason you changed the thermostat? Were the radiator hoses hot (or very warm) to the touch before you changed the thermostat? Were the heater hoses hot before you changed the thermostat? Did you get a check engine light and code stating that the engine was not getting (or slow getting) to operating temperature?
Getting heat from your heater depends on a blend door actuator letting air flow through the heater core in the HVAC unit. If your radiator hoses are hot, your heater hoses are hot, and you have no trouble code indicating the engine is not getting to operating temperature, but you are not getting heat inside the car, you need to check your blend door actuator or the control unit for the heater.

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Blows cold air turn heat on


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2005 jeep liberty blows cold air through the heater.


could be the thermostat if it was just stating to go bad,could also be a vacume problem not letting the door for the ac/heat close all the way for a few min.and if its really cold out like below 35,then its going to take longer to warm up,my jeep takes like around 20 min at idle to warm up.yours could be a case of over cooling in cold weather too ie(electric fans on before it warms up)that would be the thermostatic sensor.

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I have a 2002 Buick Century and my heater will blow air but only heats air occasionally.


If you know where the heater hoses are, lift the hood after car has warmed up I mean the engine running for at least five minutes, feel the heater hoses, if they are warm or hot and still no heat from the heater, you have an in line proiblem. if hoses remain cold, replace the thermostat with a winter thermostat.

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I can,t get heat to work in side the car changed rad did flush changed thermostat still blows cold inside car


Do yo know if the heater core is getting Flow. when engine is warmed up. feel heater hoses hoing into and out of heater core. if both are warm then you have a blend door problem. if one is warm and one is cold and coolant is full and no air locks you have a plugges heater core. reverse flushing sometime works. otherwise it would need to be replaced.

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I changed the thermostat. It works like a charm now!!

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