Question about 1986 Toyota Celica

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97 toyota 4runner

The car doesn't heater up and when i turn on the heat it would blow cold air when the car is being droven...

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Sounds like your heater coil could be clogged. Its a small radiator like device that hot coolant is pumped through to heat the cabin. its very small so clogging is pretty likely.

Posted on Oct 22, 2008

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These details will help.
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1 Answer

1990 toyota 4runner heater is blowing cold air


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1 Answer

1992 Toyota 4Runner, overheats, radiator,upper and lower hoses and thermostat new. Water pump has about 10,000 miles. upper hose heats up, lower hose stays cold. Heater blows only cold air. Help


Thanks for choosing FixYa and welcome to the site. Have you checked to see if it is a coolant sensor? Have you checked to make sure the fans are coming on? Are you leaking coolant anywhere? Checked the cap?

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1 Answer

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if the car is at normal operating temperature and the car does not over heat and the air is cold you possible have a bad heater core.

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Since you have a new thermostat installed and no heat and overheatingyou have one of two or a combination of problems. You either have a bad water pump or a clogged radiator. The radiator can be flow checked at a radiator shop, if it flow checks fine replace the water pump. The pump may not have play in it indicating it is bad, but the shaft inside cold be broken so that the fan turns and the pulley turns on the outside but not internally where it counts.

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1 Answer

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sounds like the thermostat is stuck. check this first. easier just to remove it and reinstall without one just to see if you get heat. If still not working then there needs to be a good flushing to be done. just make sure when you do a flush to leave heater controls to hot. if still not working then sounds to be like a bad heater core. you might need a professional flush which uses high pressure to blow out any clogs in heater core. hope this helps.

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4 Answers

Repair manual


Haynes - only covers till 2002

Chiltons - only till 2000

Your best bet is a Factory Service Manual for $19.95 download. Covers 2003-2009.

Thanks for using FixYa - a FixYa rating is appreciated!!



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Except your engine does not carry a factory fitted AC.

The hose that connects to the dash board should be re-aligned.

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