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Toyota highlander 2004 one engine fan stays on and heater fan when take the key out

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Engine fans can stay on after the ignition key is removed if the engine is hot, but should shut off automatically after a short time. If the heater fan shuts off when the driver's door is opened, this is probably normal also.

Posted on Sep 08, 2014


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How to fix fan cold/hot system toyota avensis 2007 2.0 lt

Perhaps the Avensis has a brittle cable like in the Highlander.
Please see
It's usually broken solder joints on a cable behind, and feeding, the temperature knob.
I repaired my 2002 Highlander yesterday thanks to this site.

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1 Answer

How do I disconnect heater for 2004 Toyota Highlander?

bypass the heater core. 2 small hoses run from the firewall to different locations on the engine (one should be the thermostat housing. dissconnect one hose from fire wall end, and reconnect it to where the opposite end of the other hose is located, creating a loop that does not include the heater core. The remaining hose (one end still attached to the heater core at the fire wall) should be connected to the opposite connection at the fire wall so it can be re-engaged next winter.

Actual problem seems to be the heat damper valve, which restricts water flow into the heater core, easiest fix is reattach the actuating cable to the valve arm (if this was detached) most costly is replace valve assemble/heater core assembly....

Oct 04, 2014 | 2004 Toyota Highlander

2 Answers

How do I disconnect the heater on my 2004 Toyota Highlander?

see heater blower, unplug the wire plug.l
there maybe another fuse, but i cant get to
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Oct 04, 2014 | 2004 Toyota Highlander

2 Answers

How do I disconnect the heater to my 2004 Toyota Highlander

If your problem is constant heat and you want to turn off the tap off but cannot then find the hoses to and from the heater and simply connect then together. Price --1 connector , 2 hose clips and a bit of time.

Oct 04, 2014 | 2004 Toyota Highlander

1 Answer


The relay for radiator fan or the blower is stuck closed or shorted.

May 10, 2014 | 2004 Toyota Highlander

1 Answer

2004 toyota highlander abs and brake light stay on and it will not shift

hi there..... if you have a abs light on this means there is a problem
with the abs. and its usually a wheel sensor. but could be one of several problems. the only way to remove the light is to repair the fault
that is something that's isn't within the scope of the diy motorist.
and would require a visit to the professionals. only then will the light be
reset. and go out.

Nov 22, 2013 | 2003 Toyota Highlander

2 Answers

The heater control on my 2001 Toyota Highlander is not working and the nut behind the heater knob is tight. Believe the problem may be the circuit board which I understand can be expensive to replace.

Once the heater control unit is removed then the connections for the knob which probably was loose at one time. There are 3 connections that break off. This is repairable by a skilled solderer as they are very close together. Otherwise it is 500+ from dealer and you don't get the whole unit, so it takes some gentleness to dissassemble that too. You might be able to find a cheaper fixed unit but I don't know of any.

Oct 20, 2009 | 2001 Toyota Highlander

1 Answer

When I turn on my 2004 toyota highlander air conditioner the fan on the motor sounds like it is running, where it has never done this before. what could be the cause?

When you turn on the AC pop the hood. If it has an electric cooling fan or an electric fan infront of the radiator and condensor then its normal for it to come on. Without air flowing through the core the AC will not blow cold air. You just may not have noticed it before, or the fan is wearing down and producing a bit more noise than before.

Jul 17, 2009 | 2004 Toyota Highlander

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