Question about 1994 Toyota Previa

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Heater blowing cold air with coolant, fine with plain water

Previa heater blows cold most of time, kinda does what it wants and over heats at times, i flushed the system and it did fine with just water and cleaner, heater worked as normal. Now with coolant back in same problem occurs of not blowing heat just cold air most of the time.

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  • arduepa Jan 23, 2009

    I have a similiar problem on a 94 Previa. Replaced bad waterpump. Ran well for 2 weeks. Flushed coolant system and added new antifreeze. Now the coolant won't flow and the coolant boils in a few minutes. Replaced thermostat but no luck. Any help appreciated. (billpardue@charter.net)

  • Anonymous Mar 27, 2014

    fan works but only cold air comes out of vents

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  • 11 Answers

It sounds like the heater core is clogged bad if u know someone with a air compressor put a air nossel on it that you pull the trigger to blos air in to the heater core after you take the lines off i had to do this before on a jeep cherokee it did the job

Posted on Jan 11, 2009

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http://howtobyme.blogspot.com/2011/11/engine-overheats-and-heater-blowing.html

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This will help.Thanks.

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