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Coleman-blower motor contiuesly on even when t-stat is not calling for heat? Suspect relay on control board stuck closed?

All-roll-out switches test good,limit test good,power good from secondary transformer! t-stat rests good.correct polarity!

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  • 1,033 Answers

Hello, the relay on the intergrated control board is stuck. Unfortunatly the relay is part of the board, so the entire control board must be replaced.

Posted on Dec 03, 2012

  • milton morales Dec 03, 2012

    Gosh Robert! That was Fast thanks-ah-bunch I really appriciate your help! Respectfully Milton.....

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Posted on Jan 02, 2017

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  • 51 Answers

SOURCE: Goodman GMH950904CXAC

make sure the blower is not set on rather than auto or the blower will run all the time. You might want to disconnect the thermostat and test the low voltage circuit to make sure the wires are not shorted

Posted on Aug 12, 2009

Therinnaiguy
  • 1420 Answers

SOURCE: Coleman furnace blower runs continuously

You should be seeing 120 volts to the igniter. Anything less requires either a replacement of the transformer, start relay or control module.

Posted on May 30, 2008

  • 89 Answers

SOURCE: GMPN 100-4 furnace. Blower motor runs when not calling for heat.

The board is bad. The unit thinks a flame is present, so it tells the blower to come on. Replace the board.

Posted on Oct 08, 2009

gear001
  • 59 Answers

SOURCE: I have a Goodman GMP075-3. Worked OK on A/C.

I come across this one a lot. You need to switch the wires at power cord.

  1. Pull power out
  2. follow the cord* back to the furnace
  3. Open the front door
  4. There should be a small metal box where the cord leads to inside the furnace
  5. Open that up
  6. Take the electrical tape off
  7. Pay attention to which wire goes where
  8. Switch the two wires around
If you still got problems ill walk you through it over the phone www.fastacservice.com

Posted on Oct 12, 2009

  • 118 Answers

SOURCE: bad control board?

bad board

Posted on Oct 22, 2009

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Coleman Evcon furnace blower runs w/ no call for heat. Temp is 5+ degrees above thermostat setting. (Programmable tstat)


When you say door are you referring to the front door or the furnace door? If the unit kicks on AND off by itself I would say it's in the tstat or the tstat wire. If it were internal I would think the blower relay or heat contactor/relay were getting stuck AND THE FAN WOULD NOT TURN OFF until you flipped the breaker. Good luck

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I have a Coleman eb15b I have replaced blower motors both relays not the capacitor. Cause it tested good but blower still. Won't. Come on wat do I do


The big question is does the blower come on when power is applied direct to the motor or the relays are closed manually?

If it doesn't the motor is suspect, if it does the control circuit is likely to be faulty.

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Blower fan continually runs


It may be but the fan control may be set to turn off at to high a temp, or theres a short between ;r; and g at the stat or furnace or sequencer, IF it runs through it. A limit or rollout switch may have failed but this will keep the unit from firering. Check for a manual blower switch that may be on. At stat it should be at auto and alsso at the fan control. A stuck relay is always possible,

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I have a dometic air/heat roof conditioner. When it is plugged in to power source, it automatically stays on and won't turn off


I agree with other answers here indicating that it could be a stuck relay contact. These units are controlled by a series of relays opening and closing contacts that apply the voltage to the compressor and fan motors. If both the compressor and fan motors are running then I would seriously suspect the main power relay is either being held ON by a stuck relay contact or the t-stat or relay control assy board has malfunctioned and is holding the main power relay in a state of constant activation. If you can disconnect your t-stat completely from the circuitry [it usually will have a connector behind the t-stat that can be disconnected] and the unit still continues to run; that would indicate to me that the t-stat is good and the problem is a stuck relay contact or the relay is being held ON. Now, after all of that, unless you have a complete schematic diagram of the t-stat, external relays and relay control board, AND have the knowledge to troubleshoot with the schematics, take it to a dealer who knows what they are doing [and all of them do not even though they may think they do]. Good luck--

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Does the blower run fine for a long period when set to on? If I had to guess it sounds like a tstat issue. Did it work before??

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Electric dryer spins no heat, replaced heater element and high limit thermostat, tested thermal fuse and it does have 0 ohms, thermistor reads ~50 ohms.


in addation to checking the high limit t-stat have you checked the thermal cut off (the small t-stat) on the heater housing where the element fits into, the high limit t-stat and the thermal cut off BOTH shoud have 0 ohms (the thermal fuse is in the blower housing) the cut off is on the heater box, if you have checked those to be good, check that the heat relay on the control board is closing and sending power to the element, if not replace the control, if all above are good then the motor switch is bad and not sending power to the element(thats a built in safety feature so the dry would never heat when the motor isnt running)the element of course heats only when 240 volts ac is to the element ,120vac from the relay on control through the high limit t-stat then through the thermal cut off finally to the element and 120vac from the motor switch for a comined 240 vac

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I have a Coleman Evcon gas (propane) furnace. When the t-stat is switched to heat the furnace heats up but the blower will never turn on. The unit then shuts down and tries to cycle again. I have replaced...


If the unit fires but the main blower fan doesn't come on the the unit is shutting off on a temp high limit switch and it sounds like the problem is the main blower fan motor or control

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Check the relays on the main board of your blower/furnace. If one is stuck, then the unit will not change from ac to heat. You may need to replace the entire board.

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Janitrol/Goodman GMP075-3 Draft Inducer Fan Won't come on


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