Question about 1998 Toyota Avalon

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Heater blend door stuck

Cold air coming from heater while mixing valve is ok

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  • Toyota Master
  • 20,706 Answers

It needs serivce
the tests and steps are all in the FSM. every lil details.
same at alldata.com HVAC chapter.
read . login .
it may have blend motors, and are unique to al lcars, and models
as are the tests very very unique. (pin , tests)

Posted on Jan 09, 2014

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Posted on Jan 02, 2017

  • 356 Answers

SOURCE: my 2000 4 runner limited blows cool to lukewarm

Have you checked your thermostat to make sure it isn't stuck open?

Posted on Oct 10, 2009

  • 3 Answers

SOURCE: 2001 toyota senna, Heater will not come on? Blows

Check coolant level.

Posted on Mar 05, 2010

lancebmobley
  • 52 Answers

SOURCE: Same problem: 2001 Toyota Tundra that won't blow

that is entirely possible yes, could also be a broken cable to change the temp from hot to cold, could be a problem with certain ac components under the dash

Posted on Dec 15, 2011

2wiseman08
  • 14 Answers

SOURCE: air blend door

First check the connections at the blend dial if it is good there then take a look at the control assembly circuit board for broke or loose wires.

Posted on Jul 08, 2012

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Great question dustin but the A/C is suppose to come on in defrost or mix mode- this is floor & defrost. Does not seem to make sense does it. One of the things the a/c does is remove the moisture from the air. You need warm DRY air to remove the moisture from the windows. An automotive H.V.A.C. ( Heating,Ventilation,Air conditioning) first forces air thru the a/c evaporator core then thru the heater core and out the selected vent. If you only want a/c a blend door will by-pass the heater core which is controlled by a hot/cold knob or digital temp cotrol on the dash. Now back to the cold air problem- assuming the basics are all ok- Coolant is full, Engine gets up to proper operating temp-around 195 degrees- upper radiator should be hot. Both heater hoses should be hot. If thats all OK the blend door might not be working. It is controlled by an electric motor called a Blend Door Actuator which are prone to fail. I have replaced many on ford vehicles. Hope this helps

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Hi There I have1994 jeep Grand Cher. cold air on heater, but hot cooland going thro core.The vacum sounds ok switching all directions : windchil , flor, mix up and down. but maybe the vacum is a bit to...


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Have a 1998 dodge caravan blows cold only new thermastst flushed system new anti freeze help


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