Question about 2001 Toyota Avalon

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Heater not working, had thermostat replaced no changed. Heater blowing cool air and warms after 1 hour. 2001 Toyota (6 C )Avalon Fred

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My 87 Celica had the same problem and it was the solder connections on the back of the heater control panel.

Posted on Nov 05, 2009

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Have you checked the fuse box under the bonet poper there is a heater fuse......try that

Posted on Sep 22, 2009

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2001 olds alero. replaced thermostat last year. Heater still not blowing warm air just cold. AC works. Defrost blows cool air.


Heater core is bad. Part is about $40...labor is around $700. The entire dashboard has to be removed and this is a major time involved job. It takes 10 to 12 hours.

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Toyota Corrolla 1995. The heater does not work, I replaced the thermostat and have put a lot of antifreeze.


bleed cooling system, probably there is air trapped in the heater core preventing warm coolant to circulate into the heater core. try this
1 open radiator cap fill coolant and put heater in hi heat
2 start engine and wait until you see the coolant start to circulate
3 squeeze hose several times watching if coolant volume decrease
4 add more coolant and repeat 3 until coolant volume stays same or start overflowing.
5 check if heater giving off warm air or repeat 3 and 4 until warm air blows on heater.
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or find the coolant bleeder screw, do 1 and 2
open bleeder screw until coolant come out, do this several times until no air comes out when opening bleeder screw, fill coolant in radiator.

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1 Answer

I have a 2001 silverado 5.3l 4x4. My heater blows warm air sometimes and then blows cold air. My thermostat stays at a steady 200 degrees when warmed up. I filled my coolant and didn't have any leaks, does...


Sounds like air in the cooling system. Try taking radiator cap off and letting the vehicle run with heater on high. As bubbles come out add coolant. This may take 20 minutes to a half hour.

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Heater blowing cool air 2001 toyota tundra


Could be that the thermostat in stuck in the open position. Change out. Or it could be the heater coil is bad. I would change the thermostat first. It's only about 10 to 15 dollors. Check the water level too.

Nov 16, 2011 | Cars & Trucks

1 Answer

TEREX 860 temperature gauge not working engine warm gauge in cool area. Cab heater warm not very hot what is the proplem


if the engine is not reaching operating temp, then the heater is never going to blow warm air. I would start with checking temp of engine, if its not warm enough (180f) I would replace the thermostat

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1 Answer

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that is entirely possible yes, could also be a broken cable to change the temp from hot to cold, could be a problem with certain ac components under the dash

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2 Answers

Heater won't blow warm air


You need to have your cooling system looked at. Either your heater switch (in dash) is broken, your heater hoses are disconnected, or you are low on coolant/water. It could also be your blower motor but as your question is phrased I'm assuming it is blowing, just not warm air.

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Sounds like a thermostat or cooling system issue. Change the fluid and the thermostat. It will do your engine good so it's money well spent.

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Heater blows cool air when it should be warm


Have the thermostat changed. this is a common problem.

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