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When ac is turned on heater won,t turn off - 2003 Toyota Highlander

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Check blend door vacuum actuator under dash. If diaphram has failed, you should hear a vacuum leak. Also check for loose hose or linkage.

Posted on Aug 23, 2010

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How do you find the heater/AC fuse? It clicks but won't turn on!


There should be a 30amp HVAC fuse in the fuse box in the passenger compartment. The location should be in your owners manual.
Keep in mind you have an electronic control panel and a control module that manages the blower speed and the other controls. Either one of these components could have failed.

Feb 02, 2013 | 1995 Buick Park Avenue

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Heater won't turn on


Do you mean the blower motor ?
Have you checked the fuse to see if it has power ?

Jan 28, 2013 | 1997 Ford Taurus

1 Answer

My heater/ac fan sometimes won't work. What do I check first?


$24the AC light does not light until you turn the fan on, that is ok, the issue with your fan only working sometimes is more than likely a faulty blower motor, in some cases it is the switch, when the motor does not turn on try tapping it and see if that makes it work, if it does then it is the motor.
the switch at autozone is part number SW295 and is $16
the motor at autozone with the blower wheel is part number PM136
cost is $24

Sep 29, 2012 | 1998 Pontiac Grand Prix

1 Answer

When I turn on the ac or the heater on my 1992 pontiac bonneville ssei supercharged it will now air to the windshield but when I change it to blow to me or my feet it won't blow any air. what coul


there is a paddle inside the sysem which moves to change the direction of the heat, i could be jammed or its actuator is broken or not getting pwer. if not it could be your switch is not working so the sigal to change position is not be received. first check all fuses are ok.

I hope this was useful.

Sep 02, 2012 | Cars & Trucks

1 Answer

2008 impala got in this evening and ac won't turn


Someone will need to check the fuse for the blower, then the blower motor and the resistor.

Aug 09, 2012 | Cars & Trucks

1 Answer

2002 chev pu heater won't change to a/c -blows hot air all the time


The first thing to do here is have the AC system checked to make sure your refrigerant hasn't leaked out due to a failed seal or damaged condenser core.

Jun 11, 2012 | Cars & Trucks

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1998 lincoln town car when i turn the temp to 90 it still wont get hot have changed the thermostat, and flushed heater core but it still won't get hot the AC works great just don't have no heater...


Just a stab at it................see if there's a vacuum or electric operated valve in the heater hose lines.Trace it out.The heater hose goes from the thermostat area at intake manifold thru the heater core,and back to water pump area. don-ohio

Nov 01, 2011 | 1998 Lincoln Town Car

1 Answer

Heater won't turn on


CHECK AC AND HEATER CONTROL FUSE. IF FUSE OKAY CHECK BLOWER SEE IF POWER GOING TO BLOWER MOTOR IF YES BLOWER MOTOR MORE LIKELY FAULTY.IF NO POWER GOING TO BLOWER MOTOR CHECK BLOWER MOTOR FUSE ANDRELAY.

Oct 28, 2011 | 2000 Kia Spectra

3 Answers

The heater/ac fan only works on speed settings 4 & 5


you might check your switch sounds like to me that your two lower speed sides of the switch maybe burnwed out.

Dec 19, 2009 | 2002 Chevrolet TrailBlazer

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