On Sat, 14 Feb 2004 20:22:19 -0500, "StephenM"
stephenaddressscfrewedonpurpose@carolinabreezehva c.com wrote:


"vairxpert" wrote in message
.. .
On Sat, 14 Feb 2004 19:34:45 -0500, "CBhvac"
stephenaddressscfrewedonpurpose@carolinabreezehva c.com wrote:


"Anthony Diodati" wrote in message
...
Why is that? Would not a lack of vacuum to the pressure switch not
allow
the
furmace to light?
Tony D.

Lack of vac would indeed, but what he describes is another larger problem
that needs to be addressed, and while anyone can hack in a fix, the real
tech will find the real problem, and repair the unit, not put a patch on
it.
That was a patch...nothing more.

Case in point. I had a customer that had (key word, HAD) a 3 year old
Rheem
90% condensing furnace. He had allowed his cousin, who had a friend in
the
trade who had a friend...and so on, install it for him. I got called out
for
a no heat call. When I got there, the unit was installed BELOW grade, in
a
crawlspace and had been flooded. I priced out a new unit. Period. The
maker
of the unit even states in clear letters, not to run the unit if it has
been
exposed to water.
He of course, declined and called his buddy of a buddy of a buddy back
out
who basically, disabled all the safetys, vac'd out the primary heat
exchanger and blocked the drain at somepoint.
I got called back about a month later. The home had caught on
fire....sorta...the lower floor joists were found to be smoldering one
morning since the drain had blocked up, filled the primary heat exchanger
with water again, the inducer motor had been rigged to run all the time,
and
the roll outs had been bypassed.

If the inducer was rigged to run all the time, how did the furnace
continue to operate after the first cycle in which the pressure switch
failed to open?

Ignore the posting name, changed it for a sec in alt.hvac and havent
bothered to change it back.

Simple...it was rigged on a standard peanut relay...When W was hot, it
started the inducer. I might...and thats might, have some pics of that one
around...if I do, you can see what a mess it was.
He had a couple of old TI sequencers in there as well, that didnt belong.

Why did he go through all that trouble instead of just letting the
control board do its job? Or was the exchanger plugged to the point
the pressure switch didn't prove, so he basically hardwired the
inducer and used a relay in place of the pressure switch that would
make and break on W in order to fool the computer? Now that would be
Sweeet!!

Oh and if you're reading this, Stormin'...please don't get any ideas!

George