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Centrifugal switch Coleman Evcon furnace model DGAT090BDD. Furnace does not come on. Green light blinking 3 times- centrifugal switch stuck open. When I turn furnace power off and then on, it resets and starts working again. However, this has happened 3 times in the last week. Where is the centrifugal switch and how do I fix/replace it?

Posted by Anonymous on

6 Suggested Answers

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  • 2 Answers

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Posted on Jan 02, 2017

mrgrzz
  • 88 Answers

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

Posted on Jan 20, 2009

  • 70 Answers

SOURCE: i have a coleman/evcon electric

Have you tried to replace pressure switch for the combustion air. If your not sure where to find it if you pull the front panels off follow the flue pipe down to combustion chamber the combustion fan motor is either inside the flue pipe or out side of it not sure on the one you have but you should see two plastic tubes that connect to a barb onto the topside of the fan and one on the bottom they both should go back to the pressure switch. i hope this helps you if you have any more question or if this doesnt fix the problem just reply back to this message . Make sure fan is working when furnace starts up. It should be the first thing that comes on when there is a call for heat

Posted on Jan 21, 2009

Therinnaiguy
  • 1420 Answers

SOURCE: furnace wont start. heil gas furnace. on initial

Yes, inspect the air intake, exhaust pipe, filter and condensate piping for blockage or moisture. Also check for a hole in the hose that goes from the small exhaust blower to the pressure switch or a bad connection on the switch or control board. You may be able to temporalily jump the switch for diagnostic purposes only.

Posted on Oct 17, 2009

  • 2458 Answers

SOURCE: coleman echelon 9.T furnace will not turn on. Red light blinking

sounds like it is the pressure switch try jumping it out on some models you fool the heater in too working or see if the tubes are blocked , there should be some codes on the front panel or the fan panel

Posted on Apr 27, 2010

  • 2458 Answers

SOURCE: DGAT 090BDF Coleman Evcon furnace in manufactured

change the pressue switch ,

Posted on Sep 18, 2010

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1 Answer

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Have to know the model and serial of the furnace.
locate code list usually inside or on the back of a door.
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IF YOU LOST POWER WHEN FURNACE WAS RUNNING IT TRIPPED ROLLOUT SWITCHES AND POSSIBLY THE HIGH LIMIT . IN CENTER OF ROLLOUT SWITCHES IS A LITTLE RED BUTTON THAT YOU RESET . YOU CAN ALSO TRY FINDING HIGH LIMIT WITH POWER SHUT OFF TO FURNACE PULL BOTH WIRES OFF HIGH LIMIT AND USE PAPER CLIP TO JUMP BETWEEN THE TWO WIRES MAKE SURE YOU DONT SHORT OUT AGAINST ANY METAL WHEN YOU TURN BACK ON IF IT WORKS YOU NEED A NEW HIGH LIMIT SWITCH.

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My furnace is a Coleman Evcon DGAT090BDD and it won't turn on at all. The green light is solid green, I can't find the pilot light, and its freezing in here. Please help me!!


Your furnace has an electronic ignitor so there is no pilot to lite...... I would shut power off to the furnace and then restart it....this will reset the control board and take it out of lock out..... If the hot surface doesn't glow after you restart it then it is probable burned out and will have to be replaced.....It is inside the furnace right behind the Gas Valve. Will have two wires running to it from the control board....If you can't get it goingby shuting off the power and reseting it then you many want to call your Service Company to have them check it out.....

May 05, 2011 | Heating & Cooling

1 Answer

The furnace ran out of propane. Filled tank and now it tries to start up for a few seconds then the green light blinks 3 times which, according to the guide, says the centrifugal switch did not close.


turn the breaker off to the furnace or the switch next to furnace and turn it back on or you have to purge the line crack the line right where it ties to the gas valve or the furnace then turn the switch off and back on

Nov 23, 2010 | Heating & Cooling

3 Answers

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I have had the same problem with mine for the last 2 years. Remove the motor on the side of the furnace(usually held on by 3 screws) and turn the fan blades inside by hand. after sitting all summer it seems to get stuck. If it moves freely, replace the motor and try to start it again. This fixed mine the last 2 years! Hope this helped.

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This sounds like a bad heat exchanger. It is possible that you do not see the crack because the crack is closed when the heat exchanger is cold (or room temp). Allow the furnace to heat up, this will allow the expansion of the crack. Turn the power off and examine the heat exchanger while it is still hot.

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1 Answer

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Looks like 4 flashes might be high limit fault on this furnace. (I don't have a manual for this furnace, just searched online for the code meaning) Is the unit running flame at all? Is the unit running flame for a while then shutting flame off before desired temp is reached? Does the main air fan turn on to circulate air through your diffusers? Does it feel like the unit has much air flow out of the diffusers if the fan is running? Is your air filter clean? If it is infact your high limit switch, it is usually caused by not having enough airflow through the furnace and overheating occurs.

Hope this helped, let me know if I can assist you further :)

Jan 16, 2009 | Coleman Propane Forced Air Heater...

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Defective combustion air switch. The 3 blinks are an error code. You didn't say, but I'm guessing you have a Coleman Evcon. They had alot of defective Combustion air switches. Your specialists were not that.

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