Question about 2002 Toyota Celica

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2002 toyota celica heater does not work

Removed the hoses to the heater core and purged the does not seem clogged. However when I started the vehicle no coolant flowed from the detatched heater hoses. I checked the upper radiator hose to see if flow was present and some coolant was flowing. The low flow could be due to the thermostat though. Thoughts?

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  • John Redmond Jan 07, 2013

    The cooling system did have air in it. Raising the front of the car a couple of feel and running the engine up purged the air out of the system; in fact I had to add about a quart or more of coolant during the process. Thanks to all who responded- the advice really helped!



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The thermostat should only restrict flow to the radiator.
If the heater system is working correctly, you should get flow from one of the heater hoses at all times.
Its possible you have air in the cooling system.

Posted on Jan 07, 2013


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If you water pump is working properly and the flow valve is fully opening then about the only thing left is a clogged heater core. Have you removed the heater hoses and flushed the heater core out in both directions. In other words back flush it. Just be careful and do not apply too much water pressure or you may cause the hearer core to leak. You may in the end have to use a commercial flush product to clean the entire system out. Hopefully you will not have to replace the heater core as this is not an easy job. If it were me I would do a complete cooling system service including replacing the thermostat which can be partially closed thus restricting the flow of coolant. But if that were the case your engine should be running on the hot side. Are you 100% sure the heater flow valve is opening fully? I hope this has been helpful.

Posted on Oct 10, 2010

SOURCE: How do you properly bleed the coolant system on a 1994 Toyota Celica 1.8 stx?

If even possible, it sounds as though your water
pump is not turning the right way

It isn't even moving any water & that is all
you worked on, unless the thermostat somehow
could go in backwards

Posted on Nov 18, 2012

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