Coleman AGU10016A Gas Furnace
That's a safety to prevent an unsafe condition. It is caused by any number of protective devices such as flame roll out, blocked flue pipe, fan stopped working and causes the heat exchanger to get too hot and trip the limit switch etc. Call a qualified tech to deal with gas appliances. Gas isn't a DIY thing.
SOURCE: furnace blower not working how it should
first off buy yourself a honeywell stat, in my personal opinion lux stats are garbage, I have run into so many that are bad stats !!! but as far as your fan not shuting down, sounds to me like your fan center on your circuit board is bad and will not shut down the fan when needed, you will have to replace the circuit board, as the fan center is a part of the whole of the circuit board, hope that helps
SOURCE: My coleman floor furnace will not stay on
Have the thermocouple replaced, ensure the pilot flame is blue - not yellow, yellow indicates blockage in pilot
SOURCE: Coleman Gravity Floor Furnace need millivolt gas valve & pilot ki
Go to www.grainger.com and look for a "power pile generator" this is a millivolt thermocouple that may be just what you need to make your heater work again
SOURCE: I have a GE (Rheem) SmartWater SmartShield Sensor gas cut off
The click you hear is the gas valve shutting off flow. It does that because the thermocouple (a rod sticking into the flame of the pilot) voltage drops, usually below 13 millivolts or so. Might be a loose connection from thermo to valve body (should be finger tight plus 1/4 turn) or a bad thermo ($13 at Lowe's). Good Luck.
SOURCE: I have a Rheem Criterion II Gas Furnace that has
Turn off the power to furnace.
on the last burner to light there is a small metal rod in front of the burner. This is a safety called the flame sensor. It is dirty. Unscrew it from the bar ( 1 Screw) unplug the connector wire from it and clean it with steel wool. it will be kind of burnt. Plut back in place and turn on the furnace to cycle.
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