We have a gas forced-air furnace. The blower v-belt broke tonight.
Oops. I'll get one as soon as the stores open; but, in the meantime, in
case anyone is up: can I run the furnace w/o the blower, like an old
gravity furnace? Or, to put it more precisely, how long can I run it
As usual ransley, you are most likely wrong again.
It has a belt drive blower so it is most likely a very old furnace.
Probably something like an old Williamson or one of the other Behemoth
furnace. You can run those day and night without a belt and not hurt
those plate steel heat exchangers. Ive seen them glowing cherry red
and still not hurt the heat exchanger one bit. Probably has the old
Honeywell limit that you can almost burn with a propane torch and not
hurt it either.
If it were a modern furnace, forget it.
When will you ever get it right, ransley?
Im "most likely wrong" only a fool like you would give out public
info that could be harmfull. No pro I know of would just guess on what
he has and say something possibly unsafe is OK. And if I said go
ahead, you would pick the opposite side, just for for a stupid fight,
are you that lonely bubba, what no friends or family to kick anymore.
Althvac is your home, you are a hvac pro, go where your types are and
Harmful? You're an idiot. It would save his home from bursting pipes
and keep him slightly warm. Thats why the furnace has safety devices
you bonehead. Im sorry you are feeling so stupid. As long as you keep
up with your bonehead advice, I'll be happy to just keep on kicking
you. Stick to something you do know. By the way, just what the hell
would that be?
Hmm, it does seem that I let him know that it wouldnt hurt his
furnace, his home wouldnt freeze, thus giving him time to figure it
out or call in a pro. He figured it out and replaced the belt.
Seems a far cry from what you gave him other than a headache.
hehe. You're and idiot ransley. A pro gets the job done. Unlike your
advice which leaves the guy out in the cold. Thus his house freezes up
and major damage occurs.
His old furnace will do just fine without the blower running. You are
a cluck ransley. A shell without a brain.
c'mon. You know the two of us are the highlight of your day. You come
home from work and the first thing you do is go to this newsgroup and
read this particular thread. Otherwise, you would have skimmed over it
entirely and never even seen it. Now how pittiful does that make you?
I've got 4 old Bryant furnaces in my apartments.
Last year a tenant ran one of the furnaces for 2 months during heavy
heating season with the blower drive belt off.
Gravity air flow and the upper limit switch must have saved the day.
As you say, the old furnaces seemingly can go indefinitely this way.
The upper limit is one of those surface mount thermo-disk types,
basically the same as a water heater thermostat. Since those go
through thousands of operational cycles, I guess these upper limit
switches can too.
I went over to do a non-related repair, heard the furnace burner on
and never heard the blower. The motor mount had loosened, the motor
shifted and the belt slipped off the pulley. After 5 minutes I had the
I asked the tenant about it and she said "Oh, it's always been that
way. The place is just very slow heating up."
I gotta get out of this rental biz....
Him just asking that question, shows he thinks unsafe and should not
even touch his old clunker furnace. One night, electric blanket and a
hat could have him dreaming its summer out he will be so warm.
Heat rises cold air falls back down the cold air return.. If it's in the
basement it should be fine. Remove the filter to enhance air flow. The
burner is controlled by the heat exchanger temperature. If it's a mobile
home forget it. Heat would have to go down then up and hot air don't
flow that way.
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