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Goodman gmp075-3 draft inducer will not shut off

Draft inducer continuously runs until main power is shut off. What can cause this?

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6ya6ya
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Posted on Jan 02, 2017

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machtcl1
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SOURCE: how to do the tune

You don't tune up draft inducers. If the inducer is bad it should be replaced.

Posted on Jan 04, 2009

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Therinnaiguy
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SOURCE: When my Goodman Gun125-5b furnace fires up the

Try and spray some mystery oil on the shaft. It may help. If not, you will be needing a replacement inducer.

Posted on Feb 18, 2009

  • 118 Answers

SOURCE: the draft inducer makes a vibrating noise at the

Check screws holding motor to housing and lint on blades making out of balance, too

Posted on Oct 22, 2009

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SOURCE: need help with a goodman gmt070 furnace

it may be clogged at the barbed fitting on the induced draft motor where the pressuer switch tubing connects. take a paper clip and **** it out make sure you can stick it thru freely till you can feel the Inducer wheel then reconnect and try again.

Posted on Nov 05, 2009

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SOURCE: Goodman GS9 propane furnace inducer motor runs continuously

it sounds like the low temp limit switch, the one that cools the furnace down with the burner off and the thermostat open, when it cools to a point the fan stops, the other switch in burner area turns burner off/on, hope this helps

Posted on Jan 31, 2010

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York diamond 80. when power is on should the red indicator light on printed circuit board be on. Replace flame senser furnace main burner still shuts down after a few seconds and we get 5 flashes from


Check polarity to the furnace, it must be correct, not likely unless new or worked on though. The induced draft has a pressure switch that has a tube that connects to the induced draft housing, that orifice clogs with carbon and a tiny drill bit is used to **** the orifice clean, it will be hard if pluged, you know you are clear when you fel,hear the inducers squirrel cage with the drill bit, the tubing if dipped can collect condensate and block the pressure of the draft to be sensed by the pressure switch and the pressure switch can be bad or off too. If the flue is blocked or induced draft wheels burned up/rusted out, not much draft is induced, you need to snoop a bit.

Oct 30, 2012 | Heating & Cooling

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Heater check out list for heater failures


Almost all furnaces built after 1978 have intermittant type pilots.
Ca banned them requiring electronic spark or hot surface ignitors, followed by induced draft motors, pressure switches or centrifigal switches that "prove" a induced draft exists, allowing the pilot sequence to commence.
electronic spark type units have a high voltage low amperage spark that is AC. Fire rectifies electricity that passes through it meaning AC becomes DC ! Fire is a terrible conducter however as a result , the DC signal is only milliamps/volts signal strength. the DC prescence is proof a flame exists for pilot, and safe to commence to mainburners.

As long as pressure switches stay closed, safeties and limits stay closed
and the DC signal to the ignition module is not broken, the furnace will run.

The normal sequence of operation is upon a call for heat from the thermostat a 24 volt signal is sent to W white (heat circuit) at the low voltage terminal board on furnace.
from there depending on unit and age the heat circuit may include a circuit board, but it still has the typical limits and safetys reqired for operation
its just not using electromechanical relays to control fan and induced draft motor etc.

for the induced draft to begin ,all limits, safetys in heat circuit must be closed.

induced draft begins and a proving switch, either pressure or centrifigal close allowung the pilot to begin, a spark or hot surface ignitor is energized and a pilot flame established,modern types use flame rectification to prove a flame, older Carrier, Payne,types have a 3 wire switch in the piloyt assembly that is a bi metal that expands and contracts clicking open and shut, allowing pilot or main burners, depending if cold or hot.

pressure switches are attached with tubing to the induced draft wheel housing and sense pressure differential and close upon induced draft running, the orifices that the tube attaches to on induced draft housing often plugs or is restricted causing pressure switch to fail to close, or waver on open and close , open , close, .

if you can run the fan in the on postion , you have both high and low voltage to the furnace.

if you dont have fan control check power, breaker , fuses.

on Dec 04, 2009 | Heating & Cooling

1 Answer

Model a36-15 - heat should be on but as the unit goes on and off sometimes the air blowing is warm and sometimes not which then takes numerous on/off to reset


This furnace has an induced draft motor and a pressure switch that has a tube that atttaches to the induced draft housing where it can sense the pressure or vacuum of the inducer motors running, thus proving to the system a induced draft exists with a purge period followed by a trial period for ignition, (either spark or hot surface ignitor) if the pilot is established another type of flame sensing device peoves a pikot flame exists allowing the main burners to run.

the pressure switch , its tubing and the orifices the tube attaches to piug with carbon or collet moisture if the tubes routed with a dip where condensate c an build and eventually block the ability of the presssure switch to sense the indicers operating, it can fail to close or waver open and closed back and forth as yours may be.

Dec 27, 2010 | Goodman Heating & Cooling

1 Answer

Have a Goodman GPG13 single package gas-electric heating and cooling unit. Turned on the heat and the outside unit ran a short time then shut off. Smelled gas after it shut off. Is this an igniter...


There is a induced draft motor that will run first to purge the combustion chamber and induce a draft, a pressure switch closes proving an induced draft exists, thus allowing the spark and pilot gas, or hot surface ignitir and gas to pilot rsil and /or burners, a trial period for ignition about 30 seconds each for 3 attempts will be made and if not lit by the 3rd attempt it locks out, requiring a reset of power to unit to reset the module or circuit board etc. 1st see what motors running, is it the flue exhaust motor/induced draft??

Nov 02, 2010 | Goodman Heating & Cooling

1 Answer

What is the model number for the Draft Inducer Motor Goodman GNP075-2REVB Furnace


I think you must mean GMP075-2rev8 check this link for parts listing:
http://site.famousparts.com/goodman/PDF/RP-169C.pdf

Johnstone supply which has many locations in many cities sells Goodman and stocks parts, and available mailorder http://www.johnstonesupply.com/corp/Default.aspx

Feb 18, 2010 | Goodman Furnace Draft Inducer Blower ...

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

How to do the tune up of B4833000 Janitrol Goodman Draft Inducer


You don't tune up draft inducers. If the inducer is bad it should be replaced.

Jan 03, 2009 | Goodman GMS90703BXA Heater

2 Answers

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


most forced draft fans are powered by 120 volts . close to the fan is usually a plug that unsnaps. create a call for heat after turning off to clear safetys and see if your getting 120 to fan on initial call for heat. if you are then fan draft motor is bad, usually sold as an entire assembly replace exact as it came out. sequence of operation is..... stat calls for heat via common and white wire to furnace , 24 volts. ......board sences call and sends 120 volts to forced draft ........ motor runs and creates pressure on proofing switch,....... switch closes 24 to board and tells it draft fan is on......... board then energizes ignitor,....... after ignitior glows gas valve is opened and burner lights ........ either ignitor or seperate sensor rod tells board the burner lit........ and a few minutes later the fan comes on and hot air is blown out. if a step is missed or doesn't proof the furnace either trys up to three times to light or locks out. turning off power usually resets safetys and it will resume attempts to lite normally.

Oct 25, 2008 | Heating & Cooling

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