Have you tried a new t-stat? They go bad. Also try jumping wires at t-stat, then disconnect & jump at furnace - to see if there's a short in the wire
SOURCE: Coleman forced air furnace blower
Rmove the two screws holding the blower in place and slide it out. With the power off, rotate the wheel and inspect for debris or an impingement. If everything turns easy, you have a bad motor or start capacitor. If you have rubbing, adjust the wheel. If the motor will not turn, replace it.
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 furnace -- fan runs, ingniter won't light,
My furnace did not have a reset switch on that particular limiter. I unpugged the switch, it had 2 wires, waited 15 seconds or so and then plugged it back in . Turned the furnace back on and the limiter reset itself.
SOURCE: i have a coleman evcon gas furnace in a 95 trailer
Most Coleman units in a trailer dont have a draft fan. Are you talking about the fan that blows air through the floor registers? If yes, then you will probably need a new fan/limit control. If you do have a draft motor, you would probably need a new circuit board or draft fan relay.
SOURCE: Coleman furnace fan keeps turning off and on every 10 seconds...
clean your heat/flame sensor with sand paper or steal wool. If the sensor is dirty, it won't detect the heat from the flame and it shuts the gas off. Clean the soot and junk off the sensor and it should work fine. I have to clean mine every year. After spending hundreds of $$ every yr on tech calls..I figured out the problem and in 30 sec I'm up and running again.
Hey, nofarmark91
Turn the Coleman furnace system switch to the "Off" position on the electric service panel.
Locate the manual reset switch near the left side of your furnace blower. Your Coleman furnace has an upper limit switch for manual reset and a lower limit switch for automatic reset.
Press the reset button, which you will find in the middle of the limit switch. Use this manual reset button when the furnace burner will not operate. (See Reference 1 pg 4 "The Furnace Controls and their Function/Important" & Reference 4 # 3)
Turn the system switch to the "On" position.
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