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How do I replace draft inducer fan - Tools & Hardware - Others

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Its Best to replace the whole assembly due to most of the hubs on the inducer blower wheel are rusted on to the shaft. the whole assembly has 3 to 5 nuts or screws that mount to the heat exchanger shroud. Pull the wire harness molex plug & pressure hose, then install new assembly.

Posted on Feb 28, 2015

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Need to find a replacement part


Here you go Angela

1149097 Draft Inducer Assembly - AllParts Heating

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Furnace draft inducer assembly. The draft inducer motor draws air into the burner and exhausts it out the flue. If the draft inducer motor is defective, the furnace ...

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1149097 - Arcoaire Furnace Draft Inducer / Exhaust Vent Venter Motor - Fasco Replacement: Replacement Household Furnace Motors: Amazon.com: Industrial ... Draft inducer motor for arcoaire model guh125a016cin Google Search

Nov 27, 2016 | Heating & Cooling

Tip

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

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

How do I wire a induce fan motor


Induced fan motors on older units are wired through the high limit safety on the stack - in series. When the furnace calls for heat, the induced fan motor comes on and after a time the furnace will light.

Older units have a temp switch in the stack that rotates to bring on the burners and blower motor. . When there is a call for heat, the induced draft fan motor comes on and then the burners will light.

After the heat exchanger is warmed up the limit switch will bring the blower motor on. That's basically how it works - there are two circuits - one for the induced draft motor and the burners and the other for the blower and high limit.

New units have a plug on the board you just plug in.

A

Oct 04, 2014 | Heating & Cooling

1 Answer

Bryant Furnace 350MAV code 31


Probably a failure of the draft inducer fan motor, draft inducer blower, or the pressure switch that senses the operation of the draft inducer.

Oct 25, 2013 | Heating & Cooling

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

Outside unit turns on but inside wont. fan is real hot


I would suggest replacing your induced draft motor. You can perform an amperage draw test to verify it's integrity first. Also check your high limit snap disks before spending money.:)

Sep 07, 2009 | Cross Furnace Draft Inducer Blower 115...

1 Answer

Central heater will not heat up to set temp on thermostac


pressure port is plugged pull hose off draft motor and clean port with a paper clip

Jan 13, 2009 | Omega Trane Furnace Draft Inducer Blower...

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