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I have replaced the inducer control board but still cannot get the small fan to run. I have 120VAC to the board but not on the card edge that goes to this fan. How is the relay energized?

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Fan relay is on the PC board. Is the LED on the board registering the call for heat by blinking?

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My furnace inducer won't run and no 120VAC from control board. Is it bad?


I'll first check the power distribution board in the workshop.
Make sure all breakers are on.
Then I'll check the wall outlet for power by testing it with another utility.
If you have power then check the fuse on the unit.
Still not working. This needs attention by some more experienced people.

Dec 02, 2017 | Heating & Cooling

1 Answer

Draft inducer fault


Pressure switch is not proving that the inducer fan is running. First check to see if draft inducer fan is running that will be the small black fan that is hooked to the vent pipe. If fan is not running then replace fan. If fan is running then check the small rubber tub that runs from inducer blower blower to draft switch make sure the hole in the blower cage is not stopped up with rust you can clear this with a sewing needle. If this is clear then check the pressure switch with a volt meter make sure it is getting 24 volts to the switch and through the switch. If it is getting to switch and not through switch then replace the switch.

Oct 21, 2014 | Dayton Gas Furnace Heater

1 Answer

Changed inducer motor, now furnace will not ignite and gives code 31


since there is no model number to go by, let's go generic. Most inducer motors have some way of "proving" it is running to the control board. It may have a centrifugal switch in it or it may have use some type of air pressure switch. The centrifugal switch will usually have 2 wires other than the power wires and most of the time, go to the rear of the motor. The air switch usually has a small rubber hose that pushes onto it and is connected to the fan housing.

Aug 06, 2017 | Carrier Heating & Cooling

1 Answer

Model m1mc 090a bw furnace pressure switch open. inducer motor is pulling .45 w.c . the intake pipe above inducer is only pulling .1 w.c. . checked for venting and intake blockages found non. removed...


did you check the hose from the inducer to the pressure switch? HAVE you unplugged the unit from the wall outlet to reset the board? DO you have a voltmeter? If you do you can run voltage across the switch and if you get 24 volts you are open.

Oct 23, 2013 | Coleman Intertherm Nordyne Miller Furnace...

3 Answers

I have a Heil H9MPDO75F2AZ QUIET COMFORT FURNACE and have replaced pressure switch and still not running


Hi Kim,
A couple things to check:

1) OK, you've replaced the pressure switch - good stuff. But the neoprene hose running from the pressure switch to the inducer motor... does it have any tears or cracks? Is the hose fittings clogged on the inducer side? Clean/replace as necessary if so. You cannot have any leaks or restrictions in this hose.

2) Try disconnecting the inducer (spent fumes exhaust fan) motor and check this motor coil for continuity with a multimeter. If the motor coil is dead, you'll need to replace the inducer (about $120.00?).

3) Check during initial startup of a heating cycle that there actually is 120vac arriving at the inducer motor coming in from the control board. If not, your board may be at fault.

Hope this helps!
Papa Fixit

Oct 25, 2011 | Goodman GMS90703BXA Heater

1 Answer

I have no power (120VAC) coming from F2 terminal of Fenwall 1466H Ignotor Control. Draft inducer will turn on and oven is inop due to this. I would like internal connections of controller to verify loss of...


I'm assuming you meant to say your draft inducer will NOT turn on. I unfortunately do not have a wiring diagram in front of me (they are usually stickers inside the burner compartment) but you should check to make sure your hood fan is running and that the air switch for the hood fan is closed, your ignition module wont receive power until the hood airflow is verified.

Sep 06, 2010 | Baxter BXA2G Stainless Steel Gas Single...

1 Answer

Draft inducer runs continuously, unless i turn the furnace off at the fused switch on the furnace. Turning the Honeywell thermostat to the off position does nothing to stop it, nor does removing the front...


Sounds like some one needs a new induce draft fan relay, if relay is located on the main control board you have to replace control board,follow wires from inducer motor and you will find the relay. I could help you more if i knew model # and serial # of the furnace, Good luck.

Feb 06, 2010 | York Furnace Draft Inducer Blower Fasco #...

1 Answer

Bryant furnance clicking, won't fire


try checking the pressure sensing switch,it has a tube that should run somewhere close to the inducer fan.sometimes this hose fills with liquids,and makes the units act funny.I don't know if you have a condensing unit or what.the furnace wont try to light if it cant tell the inducer motor is running.any induced draft unit will work this way.you can also do a temp. bypass of the pressure switch to make sure the contacts on it are closing just be sure your inducer fan is running,and you cant leave it like that its just a test.that is a safety feature you really need.

Mar 11, 2009 | Heating & Cooling

1 Answer

Gms80904bna


Since you have 24VAC, put a jumper between “R” and “W”, you should hear a relay click from the control board, this is for the inducer motor, if you don’t have 120VAC at the board, you have a faulty control board, it’s the same scenario if you do NOT hear a click.

Hope this helps

Oct 25, 2008 | Goodman GMS80904BNA Open Flame Mid-Size...

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