Question about 1990 Toyota Celica

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Heater not working

The temp guage is normal. the blower is working. the problem seems to be in the temp control dial.

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A common problem is when the gears in the control knob fail and / or the cable binds up. Also, you should have a heater control valve mounted on one of the heater hoses that cuts off coolant into the heater core. That valve may not be opening.

Posted on Jan 21, 2013

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Posted on Jan 02, 2017

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SOURCE: Intermitant temperature

Check to make sure your thermostat works right by monitoring the warming up of your engine. With a completely cold engine, start and run the engine for a few minutes, then put your hand on the top radiator hose to monitor if and when it gets warm as the thermostat opens more and more and note the gauge reading( if it works) the top radiator hose should be unbearably hot within 5-8 minutes. If the therm. opens right it should close right aswell, staying open a little while eventhough the radiator may have cooled may be what you are experiencing causing the rapid cooling and is nothing to worry about. The Hose should not get warm very soon after starting the engine. Regarding you gauge, lets take one step at a time, verify proper op. or the therm.

Posted on Jan 20, 2009

  • 3640 Answers

SOURCE: Heater does not get hot. Fan works but will only

check coolant level, if ok change thermostat, it may be sticking.

Posted on Jan 12, 2011

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