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Heater in my car blows slightly worm air - Yaris Toyota Cars & Trucks

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  • Toyota Master
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No year stated. nor engine.
the engine must be 180F or more and hold
we use what is called a tool, called a thermometer,
we measure the engine heat first. at the thermostat housing
180F is typical. if not fix that first.
check fuses if the fan "blower" is dead , is it?
blows cold in all lever positions? hot + recirc, + defrost ,high or low vents?
all vents cold? (warm)

Posted on Dec 13, 2014

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6ya6ya
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Posted on Jan 02, 2017

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gladys_neal
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SOURCE: My 2002 Taurus will not heat up inside the car

have the heater core flushed seperately from the rest of the system i have seen this on this model many times

Posted on Nov 12, 2009

  • 1779 Answers

SOURCE: 2001 Dodge Caravan heater blows cold air when stopped

Have you checked the coolant level? What you describe is exactly what happens if the coolant level is low. When stopped at idle, hot coolant is not circulating through the heater core, so no heat. As the engine increases in rpm's when you pull away from the light, the water pump is spinning quicker, and some coolant is making it to the heater core. So check the level, and if it is low, keep an eye on it to see if it drops again. That of course indicates a leak somewhere. Get it fixed, as overheating the engine leads to costly repairs and worse case a new engine. Let me know how you make out with this.

Posted on Dec 05, 2009

Testimonial: "Thanks Curt! You were right ON!"

  • 454 Answers

SOURCE: Car Heater Not Working - Blowing Cold Air

also check to see if tube that runs your climate door is not pinched or broken. the vaccum tube that runs the climate door is behind and under the battery. i had same problem a year ago and the tube was partially cut. i fixed it by cuttinga piece of aquarium tubing and spliced it back together. one other thing.....check to see if your radiator over flow cap is tight. your cap maybe bad and or cracked this would also cause the problem.

Posted on Jan 29, 2010

  • 71 Answers

SOURCE: cars is overheating-heater blowing cool

Hi check water pump for leak and all hose connection then make sure the coolant is full then pressure test the system most leaks are from hoses and water pump not many with block and radiator. be sure to change oil when you get it fixed, consern is oil vescosity. hope this is helpful.

Posted on Feb 01, 2010

conrynsilver
  • 56 Answers

SOURCE: heater only blows worm air

Check these three possibilities: One, car has a bad thermostat. Two: Car has a bad heater control valve and three: Car has a vac leak under the dash that controls the heater Flap Valve. If this flapper isn't closed completely, cool outside air mixes with the warm inside (recirculating) air and cause a lukewarm air mixture at the vents.

Posted on Oct 24, 2010

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