It was cold enough for the heat to go on, and although the fan started
blowing (forced hot air system), cold air was coming out. I went downstairs
and I see that there is no ignition, so I'm guessing the ignitor is shot.
This is a 10 yr old American Standard, Freedom 78 unit. The question is, is
the igniter something I can change myself, or is it time to call the heating
O.K., that's reasonable suggestion. So how do I go about making sure it's
the ignitor. When I crank the thermostat up, the fan starts, the gas starts
fo about a second, but no ignitor glow, so the flow of gas stops, and the
fan keeps running. After a few minutes, the gas starts flowinf for about a
second, and the cycle just keeps repeating. Do you think it might be
something else? Any ideas what?
You really should call in an expert. I understand you want to save some
money and you are compenent enough to do it yourself, but by the time you
start "parts changing" (and that's IF you can get the parts) you may be into
more money than if you called someone and had them do it right the first
Fixing a furnace is not rocket science, but it's nothing to fool around with
if you don't know what you are doing. Bottom line? Pick up the phone and
call someone out to do a proper repair....
I'd check for current at the igniter with a multi meter. If you have current at
the points the igniter connects, when the ingniter is supposed to heat up, then
I'd try a new igniter. That's what I'd do.
Red Neckerson wrote:
I had a similar problem last year and tried to do exactly that. Only, I didn't
have any manuals and couldn't get any info on what the current should be at
those points. So, I called in the repairman. I think it was $33 for the
igniter and $95 for labor (it only took 5 min to fix, but with driving and
that, it was their minimum charge). I could have saved $95 if I had the manual
:-(( (Actually, I was kind-of leery fixing it myself. I always fear that I'll
do something wrong and the furnace will blow up as I'm sleeping some night. I
slept better knowing it had been done professionally). Plus, even if I had
attempted to do it myself, I don't even know where I'd get the part.
I fully understand, I wouldn't want to do that either, because you don't
know who is on the keyboard, at the other end. Sorry I made is sound like
you *had* to give me advice. I sincerely did not intend to.
In any case, I just finished replacing the glow plug. $26 for the part, one
screw to unscrew, one plug to unplug (not even 5 minutes total time), and
the house is already a roasty 66 degrees. Luckily, it wasn't anything more
I'm guessing that you can find an ignitor on the internet, and change it out
yourself. If you're good with tools, electrical, following schematics, and
But what if it's some other problem? You can go changing out parts, and
never get it fixed. Or pay more than just calling a repairman who can
diagnose and fix it right for you.
I don't want to sound mean, but the very fact that you're asking the
question tells me that you don't have the background. Or you woulda just
I would still have it looked at. on most forced air gas furnaces, the
fan will not come on until the output temp rises to a factory set temp
and runs after the flame goes out to cool down the heat exchanger.
someone may have "worked on" your furnaces in the past.
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