Heater Problem

[aardvark]

I have an 88 camry without A/C and automatic temp system. At times it won't heat. I've checked the hoses, stat, heater control valve, etc. When it quits blowing warm air i can hear something in the heater box moving, then it blows cold. Is someting opening the air vent into the system? I pulled the control panel and sprayed the switches with WD-40, that helped for awile. There is 2 little control boxes, 1 behind the radio, and 1 under the heater box, all electronic. I didn't see any vacuum hoses to any of the heating system. Anyone have any ideas? Thanks

[Kep]

I'm pretty sure that there are plastic louvers inside the heater box that direct the air flow. I don't know how they are controled but it sure sounds like that is the problem.

Kep

[Tommy]

there is a thread floating around on how to fix this. its actually the push button control unit itself. there's a few points youll have to resolder. Do a search and youll find it, or hit the junk yard and pick up a new one.

[TBayToyotaBoy]

Yup, same problem I had last winter when it hit 25 below freezing. Hit a scrap yard and replace the vent control module in the center console (it has a rheostat in it which controls the vents). It fixed my problem perfectly. Soldering the rheostat apparently doesn't fix the problem for long...

[IvanHoe]

Originally Posted by Tommy

there is a thread floating around on how to fix this. its actually the push button control unit itself. there's a few points youll have to resolder. Do a search and youll find it, or hit the junk yard and pick up a new one.

yup!
Thank goodness my Cam doesnt have often faulty pushbutton controls........ya gotta love the old fasioned slide controls!!

[ROBS]

Here you go:

http://www.toyotanation.com/forum/t9592.html

...I have this same peoblem as well. Gotta get to the junkyard, its freezing up here...lots of snow this winter.

[TBayToyotaBoy]

^^ Yer not kidding, ROBS. For the first time in memory I'm jealous of the snow YOU'RE getting. It's almost brown here.