Bingo

You are absolutely right. There is a reset button hidden between those two
terminals in the upper limit switch in that heat chamber.

Wow, nothing I read in my manuals said anything about that reset button. And
I paid a technician to come in and diagnose what was wrong, he told me to
clean out the condensing housing there, re-silicone that as that may be
clogged up but it wasn't and I did that. He also told me he was 99% sure it
was a failed board and for him to replace was 300 plus the board, I
purchased a board for 80 and did it myself and dam, same problem existed.
Now I can return the board (or keep it as it is newer board and allows me
now for cooling delay where the old board didn't and the old board didn't
have fuses on, the new one does) so newer board is improved but now have
back up board so it wasn't the board at all. I paid for a licensed
technician to come diagnose after I tried all componenets, and was wrong.
**** happens I guess. Turns out you are exactly right Bob about the limit
switch causing both fans to run immediately. after resetting that little
button (why didn't that service guy know there was a little reset button
hidden in that unit). I bypassed that and must have had the other one closed
because it is inline with the smart valve. Wow, what a learning experience.

Anyway, I know more about my furnace than most home owners now, so good
learning experience for me and have about 100 dollars worth of extra spare
parts incase it fails again.

Excellent advice as usual from you hams. Appreciate every one of your
comments, suggestions, tips. I got it working and saved a few hundred
dollars but now know more about it than before. A lot more. Very shocked
that the licensed service technician furnace guy didn't simply try that
reset button. The easiest fix in the world, yet missed it and he would have
replaced the board and found the same problem exists then he would have kept
trouble shooting and found the relay reset button like I did and charged the
home owner a big amount and replaced the board for nothing. Should have been
an easy reset fix. Now I know.

Thanks Hams,,, 73s and happy holidays.

Now if I read anyone having issues with their furnace similiar to mine, I am
happy to offer advice. Big learning for me. Excellent. (but cost me about
100 bucks but shouldn't have cost me anything).

Thanks again





"KB2ZGN" wrote in message
...
I only just saw your post this afternoon, but before you replace the timer
board, check to see
if there is a limit switch in the blower compartment, and see if there is
a
reset for it. If this doesn't work, connect a jumper across it and see if
that
works. If that doesn't do the trick, look for other limit switches and do
the
same for those. You may not need to replace the timer board after all.

Let us know what you find out please.

Bob KB2ZGN


On Tue, 20 Dec 2011 08:47:38 -0500, " Tuuk"
wrote:

Hi

Thanks for all the advice. And I have tried all those. I took the
condensing
fan blower out and cleaned out that housing behind it and re-siliconed it.
It did have some gunk in there but not enough to cause a clog. But now
that
is clean and when I reinstalled it the exact same thing happened. What is
troubling me is that even if the thermost wires are disconnected from that
board what happens is both man blower and exhast blower simply are the
only
things that run. Instantly. No sequence of events eg blower starting, then
ignigters starting then main blower after heat exchangers heats up. None
of
that. I jumped that float switch and those vacume hoses I sucked and blew
through them and I can hear the switches working, but same thing happens,
nothing happens with that honeywell smart valve, no gas. I checked all the
intake air pipes and exhaust pipes, nothing clogging. While everything
leads
me to believe it is the board so I bought another for 80 dollars and will
replace that board today. I will take a photo of the board and one by one
replace those wired and connections and try that. I was hitting those
relays
on the board and still nothing.

Seems some are upset because of my posts of my antenna and my sauna and
garden,,,, well coincedently enough I have in my basement the sauna and
steam bath thing I also installed and it was that very night that me and
the
missis were steaming it up in the sauna and steam bath and I think maybe
there was moisture in the air that evening as that was the evening it
failed.

To answer a question about the lights, my friend's furnace has the idiot
lights where it blinks signifying what has failed, mine has no lights on
that board, I think mine was the model before his, mine is about ten years
old. I am going to replace this main fan relay board and see if that
solves
the problem, I can return the board if the same problem remains and start
replacing the next part after that until something works right. I replaced
the thermostat with the old one and same problem.

Thanks for the advice and tips. As I have said, I know there is a lot of
knowledge in this group, I have benefited from it before and will again,
as
my server doesn't have active newsgroups like HVAC or Furnace or any of
the
other crazy things I have asked about. Lots of knowledge here, thanks. And
i
cannot wait until someone asks a question about their furnace, or their
sauna rocks, or their tower, or their garden,,, because I will be the
first
to answer.

73