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Hey, Whirlpool furnace in attic no ignition after induced fan on a few seconds, sonds like the induced fan is working weaker than my other furnace in basement. Is it possible if something such as leaves fallen into the vent pipe and block the vent way? Thanks.

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Sounds like you have a problem with your pressure switch. Make sure the tubing which runs between the inducer fan housing and the pressure switch is no clogged. Remove, clear, (blow through tube) and put back in place. Then restart the system. If problem persists call a licsenced HVAC technician and have him/her confirm that the inducer fan is operating properly.

Posted on Sep 30, 2008

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Amana 90 furnace won't ignite. Inducer fan runs for 30 seconds then shuts off and nothing happens. Try to turn fan on at thermostat and nothing happens. Ac works fine.


Most likely one of two issues is occurring. Either the inducer fan is not providing enough draft because it is either spinning too slowly or the impeller is damaged, or the pressure switch that the inducer motor air flow is supposed to activate is not operating properly. If the pressure switch fails to activate, the furnace will not open the gas valve and fire the ignition believing that there is not sufficient draft the vent the combustion gases.

Oct 17, 2015 | Amana Heating & Cooling

1 Answer

My York furnace sometimes doesn't completely ignite


A noisy inducer probably is headed for replacement.

The igniter can produce a healthy glow and still be defective. Mine had to be replaced with a new, improved one.

The thermocouple could be defective even though it seems to open the gas valve when it should.

The heat sensor in the bonnet could be defective. That controls main blower operation.

The heat exchanger could be cracked.

Jan 10, 2014 | Heating & Cooling

1 Answer

How to trouble shoot trane 80 gas furnce


The 1st thing I do is go to the thermostat and put the Fan switch from Auto to the On position. If the fan operates this proves you have both high and low voltages and the breaker, fuses, transformer etc is functional, this saves one from going to the breakers and air handler often in an attic or roof or basement.
If the fan does not operate then I check for correct power.
Set the thermostat for heat mode and turn the temperature setting well above the rooms temperature. and observe the furnaces sequence of operation.
What you normally expect is upon the white circuit from the thermostat being energized with 24 volts, the induced draft motor will cycle for 30-60 seconds typically to pre purge the heat exchanger, after this purge the induced draft motor has a pressure switch that senses the induced draft operation thus proving the induced draft motors running and alloqw the ignition to begin, either a spark or a HSI, hot surface ignition type.
If you see no bright white light or hear a sparking noise by the burner area this is normal, this will be followed by a trial period for ignition, meaning the gas valve will be energized for a 30 second trial period, during this time the flame rectification proves a flame exists by a DC signal being sent back to the module by the flame sensor or the ground/burner ground.
This DC signal is very weak and easily interrupted and this is why we clean flame sensors and simply re seating wiring will often times correct a situation,
The typical issues are the induced drat pressure switch and the orifice that it's tubing connects to on the induced draft housing.
This port must be reamed to clear carbon and if not will cause a problem such as locking out requiring resetting power or a 5 hour wait for some units,
You need to insure the limits and roll outs are all closed, its all failrly simple if the LED is tellingyou the error as they do today.

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Feb 19, 2013 | Heating & Cooling

1 Answer

Hello there, I have a Goodman GMH951155DXAC furnace that I got in 2007. I have the following problem for the last 4 years: When the thermostat calls for heat the induced draft motor comes on and 30-40...


With furnace OFF ,Disconnect the top of the hose that leads to the
Bottom of Daft inducer Box, Now blow into it water will come out
of the drain hoses "condensation " this will shut the unit down if not drained. There must be a Trap on the side of the Furnace with water in it , to have positive presure to suck out condensation. This will fix problem. some installers forget to install this Trap that comes with Unit.....!!!! A little item
that will shut the whole system DOWN. :o)

Jan 06, 2011 | Goodman Heating & Cooling

1 Answer

Rheem 3204-80D furance. Turns on and fan starts. Then in about a minute the fan shuts off.


Problem: Your furnace will not ignite the gas to produce heat for your home. When a furnace has a bad ignitor what I see most of the time is the following sequence of operation:


1. Thermostat calls for heat. 2. Draft inducer motor starts. 3. Pressure switch attached by a small plastic or rubber tube senses the negative pressure produced by the draft inducer and closes. 4. Draft inducer runs for 30 seconds to a minute before you hear a gas hissing sound. The ignitor did not glow, the flame sensor (a small metal probe about 1/8" in diameter, with a white porcelain base) does not sense the flame, so after 8 to 10 seconds the hissing sounds stops with no ignition of gas to heat your home. Your furnace shuts down and goes into a lock out condition until you turn your power switch back off and on again. Then the sequence starts all over again with no ignition of the gas. Solution: You probably need to purchase and install a new ignitor. I would suggest that you inspect your ignitor closely for cracks. Make sure you do not touch the ignitor with your bare hands. If you do not visually see a crack, then you could have a furnace control board problem or a limit, rollout switch problem. The furnace's control board might not be supplying the voltage to the ignitor. If your furnace lights and the gas stays on for 8 to 10 seconds, then shuts right back off, then you need to clean your flame sensor with light sand paper or steel wool. You might need a new flame sensor, but most of the time they can be cleaned an will work well after cleaning.

Nov 26, 2010 | Heating & Cooling

1 Answer

I have a downdraft Goodman furnace. On only some occasions the blower will start, then after a few seconds I will see the igniter light up, but then I do not get the rush of gas and lighting of the...


It sounds like you got a tough one there.When you say the blower starts up and then the igniter comes on are you refering to induced draft motor or main blower. The proper sequence is for the thermostat to call for heat at which point the induced draft motor should come on and run for 30-45 seconds,then the igniter should heat up for a few seconds then gas valve should open and main burner should light. After limit switch reaches set point for fan on ,blower should come on till after heat has reached thermostat setting then burner should go out, and blower run until fan off setting is reached on limit switch. If your furnace is not following this sequence and then not always doing the same thing in the same order,I would recommend that you change out board again. I have had several problems similar to this with Goodman units and all but one time installing new board solved it. That time I did everything I knew to do and talked to factory service techs repeatedly and finally installed new furnace. As far as your question about insulation,. As long as it is fire proof I can't see where it would hurt anything. Sorry I'm not more help. Good luck and thanks.

Nov 12, 2010 | Goodman GDS80904BNA Open Flame Heater

1 Answer

Rheem 90+ NG Furnace. When furnace starts, draft inducer starts, ignitor glows and gas ignites. Burners stay lit for 10 seconds or so, then the flame reduces for a few seconds then goes out. Main blower...


Check the draft inducer air switch ( vacuum diaphragm switch) If the switch is opening when the burner starts, you might have a blockage on air piping coming into the furnace. Also prime the condensate trap on the condensate drain from the combustion fan. Also check the gas pressure, if your gas pressure is dropping, the gas pressure switch will shut it down. If it's too high the moment it comes on could raise the pressure in the furnace dropping out the combustion fan proving switch.

Oct 29, 2010 | Electric Circuit Breaker Kit for Furnace

1 Answer

Rheem Model# RGDJ-10eamer sometimes lights and sometimes does not


Find the small tube that runs from the inducer blower. Disconnect the hose and see if there is water in it. If so then I suggest remounting the pressure switch that it is attached to a little higher and so that there is no droop in the tube for water to collect. Just shortening the tube will only allaow water in to the pressure switch. The second thing is with the tube disconnected at the inducer take a straightened paper clip and poke it in the orifice on the nipple attached to the inducer. there may be a partial blockage. Let me know what you find.

Feb 27, 2009 | Heating & Cooling

2 Answers

Ignition failure after three attempts then sits for an hour.


try cleaning the burners and or adjust the distance the igniter is from the actual burner .

Oct 01, 2008 | Goodman GDS80904BNA Open Flame Heater

5 Answers

Goodman furnace I think


Ok, a flashing 3 on a Goodman control board usually means that the pressure switch is tripping. A few things will cause this. One being a restriction in the exhaust or combustion air inlet. The second could indicate a faulty inducer blower motor and the third would be a blocked or bad pressure switch.
 
With the front cover off and door switch taped down, Have a helper turn the thermostat up to 75. You will be watching the circuit board for flashing lights and in a few seconds the inducer motor (the small fan hooked to the exhaust) will start. If this does not happen, we either have a bad circuit board or blower motor. If the fan starts rotating, inspect the hoses going to the small circular pressure switch. Sometimes they may get either water or debris in the hose and not allow the switch to sense pressure. If the hoses look OK, the igniter will glow an orange color and you will see this if you look thru the small viewing port. IF no glow, you could have a bad pressure switch, a bad ignition relay (found on the circuit board) or a bad igniter. OK so if the igniter glows, a few seconds later the gas valve should click open and send gas to the burners. The orange will turn to blue. If this does not happen, you have either a bad gas valve or bad circuit board. Finally if you get flame but it will not stay lit more than a few seconds, you may have a restriction in the burner gas train, a bad gas valve, a dirty or bad flame sensor or not enough gas pressure.
 
Knowing the sequence of operation will give you the needed information to talk with a service technician and cut down on diagnostic costs.
 
Try looking on the back of the furnace access panel for both model number and a diagnostic schematic. This will confirm what the flashing 3 code means for your unit.
 
Sorry, without knowing the model number, this is the best I can do for you. Good Luck!

Oct 28, 2007 | Goodman GMS90703BXA Heater

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