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Originally Posted by sptt
So it almost sounds like what you are saying and that it may not be the heater core...
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Yes, that was pretty much what I meant.
Quote:
Originally Posted by sptt
When I saw the smoke... It was coming up through a small vent on the outside of the car underneath the wiper arm.
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Blower motors are a common failure on these cars at this age. If your fan doesn't work you won't really get much heat. Your blower motor is located right underneath that vent along side of the wiper motor. If it burnt out it might show some smoke right where you saw it and smell of burning wires, plastic etc. The fan usually gets noisy before it goes, but I guess it doesn't have to.
Quote:
Originally Posted by sptt
Anyway to test something like that?
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As previously suggested, turn on your blower fan. Does it work? Sitting still, does air come out anywhere? If not, that or the wiring to it would be the prime suspect.
Quote:
Originally Posted by sptt
Additional thoughts?
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Did you check the other two items mentioned? The mono valve is located in proximity the blower, I've personally never heard of one "burning up" but it has electronic components and a wiring connector that I suppose could short out. If it does, it might cause a burning smell and perhaps visibly smoke in the area you saw it. If the valve doesn't work right you'll probably have minimal heat.
Same situation with the auxiliary pump, except, if it burnt up the smoke and most of the smell would be isolated in the engine well, which is separated from the cowl (or wiper area) by a rubber weather stripping seal.
The smoke could have come from the wiper motor, but it would be a big coincidence that the heat stopped working right at the same time.