Hey Ryan,

I hesitated to reply earlier, but now your trouble is solved, I'll
tell you that I was having a somewhat similar problem. My furnace is
a "mid-efficiency" gas forced air and uses a programmable thermostat.
The program allows the house to be cooler at night, and then at
6:00AM, a warmer "daytime" temp is selected. I noticed that quite
often the ignition sequence would start, but about 30 seconds later
the "noises" wou,ld stop. Then about a minute later, it would cycle
like that again. Eventually, it seemed to get warm enough to bring
the blower on-line, and then would seem OK through-out the balance of
the day. I suspected a bad heat sensor that was not turning on the
blower, and then when a "high heat" sensor tripped, it would shut
down. But as usual, I was wrong. I had a furnace tech come in, and
after my description he reached inside and pulled out a flame sensor
rod. He cleaned a build-up of carbon from it, and replaced it. Runs
great now.

Take care.

Brian Lawson,
Bothwell, Ontario.
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
On Fri, 31 Oct 2003 22:34:13 GMT, "Ryan"
wrote:

The problem was a plugged heat exchanger in the boiler, which was not
allowing the boiler to vent the exhaust properly thru the chimney. A
thorough (read NASTY) cleaning was in order, and it now works 100%. Thanks
to all who lent a hand...

Ryan





"Ryan" wrote in message
news:jxhjb.4819$S_.2236@clgrps13...
Time to get the heat back on in this neck of the woods. My workshop has
floor heat, with a boiler (natural gas). This boiler (placards indicate
"MG-125-N-E Mini Gas 'super hot' with Honeywell electronics) does not
have
a pilot light, but it fires up a piezo sort of lighter which ignites the
boiler and it heats the circulating water until it reaches the required
temperature, then shuts off. Cycling this scenario over and over. It
normally runs for about 3 minutes, and is off for about 10 or so. I
noticed
at the end of the heating season in the spring that the boiler would not
always stay running, and have to restart several times just to get thru
one
'cycle'. The unit is 3 years old, and I just do not trust the shop that
installed it to call them up about this problem. They tried to double the
quote when the job was first completed, and I have soured of that
relationship.

You can see (and hear) the piezo fire then the boiler lites and runs for
maybe 10 - 15 seconds. It shuts off, then retrys to lite. Basically it
will not stay running for as long as it needs to, and it seems like
something is shutting it off. As with so many other things these days,
the
unit has an electronic control panel, with LED's and such, but no error
codes are apparent. I guess it must be time to call a different repair
person, but I thought I would try the group first, and see if anyone has
any
ideas. There is a couple of wires going up to something that looks like a
temperature sending unit in the chimney, so maybe there is a problem with
that unit not sending the proper signal back to the starter, so it will
not
stay running... any helpful thoughts?

TIA,

Ryan