Sounds like the thermocouple is on its way out. You _might_ be able
to get a few more lights out of it by redirecting the pilot flame or
increasing the gas to the pilot, but your best bet is to check the
connection from the TC to the control then replace the thermocouple.
They cost a few bucks at a local hardware store.
> Date: Wed, 20 Nov 2002 23:48:37 -0500
> From: Trevor Boicey <firstname.lastname@example.org>
> I have a natural gas heater in my garage, and today I realized it's
> still giving me problems. (it was last year too, but it got warm before
> I got concerned)
> This is a ceiling hanging model, with a pilot light, but I use it so
> seldomly I light the pilot light each time.
> So the procedure I follow is to turn on the gas valve, turn the valve
> on the unit to "light", hold down the pilot button, light the flame with
> a long match, and wait holding the button down for a painful interval
> until releasing the button no longer makes the pilot die.
> So far so good.
> So I then kick on the electrical, and the unit fires up full bore
> with fan and heat, and runs for a while. (20 minutes or so, enough to
> get the garage warm)
> However, then I notice that the flame is out, even though the
> thermostat should still have it on. The pilot light is out as well, just
> the fan is running, and it shuts off after a while too.
> Any ideas?
> I suspect something in the safety circuit is malfunctioning and
> cutting off the gas, thinking the flame is out. This might also tie into
> why it takes a long time for me to be able to release the pilot button
> before the system stays running on it's own.
> Perhaps the sensor is position sensitive, and needs a tweak? I
> confess I don't know all the basics on these systems and obviously want
> to be very careful, but it seems simple enough.
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