Mechanics

NO HEAT

1997 Toyota Camry

Heater problem
1997 Toyota Camry 4 cyl Front Wheel Drive Automatic 120000 miles

My air conditioning works fine and I cant find any fuses that are blown. I can't even get any engine heat through the floor vents. The car doesnt over heat when driving. I believe it may be an electrical problem because my dome light doesnt work either.
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Phlk5
December 3, 2008.




Ok when you switch from hot to cold on the dial does it make any noises like a motor or vacuum or anything? I am thinking that the blend door or blend door actuator on the door is not working. It could simply be that something fell down the defrost vent and is blocking the door. See the blend door directs the air flow. When it directs it throught the heater core then it warms the air when it bypasses it you get cold air. Here is a pic of a blend door let me know what you find ok.


http://www.2carpros.com/forum/automotive_pictures/249564_379286_2.jpg


Racefan966
Dec 3, 2008.
I just checked there is no sound whatsoever when I switch from hot to cold or vice versa.

Tiny
Phlk5
Dec 3, 2008.
Ok it sounds like the air outlet servomotor might be bad. Here is a view of the hearter and a/c components and number 14 is were the servo motor is this is what needs to be checked to see if it is working.


http://www.2carpros.com/forum/automotive_pictures/249564_Graphic_13.jpg



Now you need to unplug the harness from the servomotor ok. you will apply voltage to pin 6 using a jumper wire, now connect pin 7 to ground. Now with another jumper wire connect pin 5 to ground and it should go to defrost, then put it to pin 4 should be mix, pin 3 should go to floor, pin 2 should be bi-level, pin 1 should be vents or face. So as you switch the last jumper wire from those above pins it should change where the air flows if it doesn't then the servomotor is bad and needs replacement. If you have any questions please just ask ok. Here is a pic of the pins and there numbers ok.


http://www.2carpros.com/forum/automotive_pictures/249564_servomotor_harn_1.jpg

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Racefan966
Dec 3, 2008.

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