On 12/21/2011 4:35 PM, Tuuk wrote:
Absolutely right.

I appreciate all the input, yes it would have cost me a lot and for what
turned out to simply be a resetting of that limit switch.

Good part is that I learned my furnace mechanically inside and out. Only
costs me about 100 and have a spare board now.

But after trying everything I could think of, after bypassing all the
safeties and bypassing things I was just perplexed.

Thanks again

73s

The only thing I wonder about is why it tripped the limit..
I'd keep an eye out on it for a while.. Make sure the fan
never quits running when it should be, doesn't start slowing
down from normal speed, filter clean, etc..
Of course, if there is some problem, it will just trip again,
and you might be able to get an idea what is causing it.

I've already listed most of the things that could cause that.
In the majority of cases, it's the blower motor going kaput.
Then again, maybe it was just a fluke.. @#$% happens sometimes..

I said before that I didn't want you to burn your house down,
but actually it's almost impossible with all the safety devices
those things have. So you really don't have much to worry about
if something does cause it to overheat in the future.