20 Most Recent Goodman GMS90703BXA Heater - Page 5 Questions & Answers


Hi,
Yes, they do make a conversion kit...you should be able to find it online or buy it from a dealer...

How to find Air Conditioning, Heating and Furnace parts online.
heatman101

Goodman... | Answered on Dec 05, 2013


I got my switch part from part-express.comparts-express.com

Goodman... | Answered on Dec 04, 2013


get a good can of spray adhesive and follow the directions on can....can get at most hardware stores! good luck!

Goodman... | Answered on Dec 03, 2013


Usually 24v.

Goodman... | Answered on Nov 15, 2013


Based on the info you have given here, I am going to make some assumptions. In "cleaning out all the components" you cleaned the air filter or changed it, cleaned the duct-work, and the intake combustion chamber? When the "furnace stays lite" the pilot and the main burner stays on? Lastly, when it "continues to blow cold air" is this when the main burner is on after long periods of time? If the answers are all yes, then maybe some of the ducts have come off, or the burners aren't working correctly.

Goodman... | Answered on Nov 12, 2013


There could be a number of other potential causes.
1-Ignitor failure
2-vent blockage
3-tripped rollout safety switch
4- tripped limit control
Etc...
Look at the door of the unit for a explaination of the number of flashes of the light. This may get you started in the right direction.

Goodman... | Answered on Nov 12, 2013


Sequence of operation, Gas Furnace.

On a call for heat, the 24 volt thermostat sends a signal to the control module. The control module will indicate a call for heat with a light on the control either blinking or remain solid depending upon model. The inducer (exhaust) blower will purge all gasses from the furnace and pressurize a pressure switch. Once the pressure switch tells the module to continue, the electronic ignition will energize and send 120 volts to the ignitor. The ignitor will glow and you will be able to see it if viewed thru the small inspection port. Once the ignitor gets hot enough, it sends a signal to the module opening up the gas valve (24 volts). Either a pilot will come on or the burner tube will ignite then spread the flame to all burners. Lastly a safety sensor will be looking for a certain temperature within a few seconds and the furnace will continue to operate and the room air blower will turn on in a minute or two.

What could go wrong? The unit will not run if there is no signal from the thermostat (bad thermostat or broken wire), the control module does not sense a signal from the thermostat (bad control), the inducer does not energize (bad motor), the pressure switch does not close (blocked vent piping, bad switch, plugged condensate hose), the ignitor does not energize (bad control, bad ignitor), the gas valve does not open or there is no gas (bad gas valve, broken wire, no gas), the pilot does not lite (dirty pilot), the burner does not lite (bad burner, plugged orifice, not enough combustion air), the flame does not spread to each burner (bad flame spreader, dirty flame spreader, more bad burners), the flame safety sensor does not detect flame (dirty or bad flame spreader, bad flame sensor, broken wire, bad control), or the room air blower does not energize (bad fan motor, bad control).

Most newer furnaces will have a diagnostic center or control built into the control module. You may be able to view it as it is running thru a small viewing port. Some models will require the removal of an access panel prior to finding it. On the reverse of the access panel, there will be a diagnostic chart that will aide you in understanding any error code recorded (usually a blinking light).

This is why we technicians earn the big bucks!

Goodman... | Answered on Nov 12, 2013


LAST RESORT IS THE BOARD, FIRST I WOULD TRY THE VACUM SWITCH TO SEE IF THAT IS WORKING, IT IS THE ROUND PEICE WITH A HOSE GOING TO IT, MAKE SURE IT IS NOT BLOCKED, YOU CAN BYPASS IT BY CONNECTING THE TWO WIRES TO IT, STICK A PAPER CLIP IN THE ENDS OF THE WIRE CONNECTORS, TRY IF THAT DONT WORK, CHECK THE LITTLE ROUND DISK THAT ARE LOCATED ON ALL SIDES, THESE ARE A SAFETY FETURE, THEY USALLY HAVE A LITTLE BOTTON ON THEM, JUST LITELY TAP THEM, TRY. MY GUT TELLS ME IT IS THE GAS CONTROL VALVE, FAN STARTS, IGNITOR STARTS, NO FUEL, THE GAS CONTROL VALVE CAN BE CHECKED WITH A VOLT METER, WHEN THE UNIT GOES THRU THE START SEQUENCE, THE TWO WIRES GOING TO THE GAS CONTEROL VALVE SHOULD HAVE 24 VOLTS OR ABOUT GOING THRU THEM IF SO VALVE IS BAD, USALLY IF IT IS THE M.BOARD YOU CAN LOOK ON THE BACKSIDE OF THE BOARD AND YOU WILL SEE EVIDENCE OF FAILURE,A BURN MARK, I HOPE THIS HELPS.

Goodman... | Answered on Nov 11, 2013


need more information, does it have power ?

Goodman... | Answered on Nov 09, 2013


One thing to try is, shutting down the direct power to the unit for approximately 5 minutes, then turn the power back on and retry the unit by turning up the temp on the thermostat, this normally resets the circuit board in the unit. If the problem still continues, you may be having trouble with the pressure switch, also check to see if there is a blockage of the air intake, such as a bees nest, or if you are where there is a lot of snow or ice this will also cause blockage of the air intake and must be cleared for proper operation, and will affect the pressure switch as well. Hope this helps !!!!

Goodman... | Answered on Nov 08, 2013


Check all safety switches on door. Make sure the main breaker in fuse box is on and well as main switch on furnace. Please ad more details. New install, just quit working? How old....

Goodman... | Answered on Nov 04, 2013


Try replacing the filter. Low air flow will allow the furnace to overheat. Sounds like a simple answer. Wish I had tried it before buying a flame sensor and controller. Live and learn I guess.

Goodman... | Answered on Oct 24, 2013


I would go to the goodman website

Goodman... | Answered on Oct 20, 2013


Turn main power off to reset unit then back on. If unit still blinking count the number of blinks and there is a list of codes on the inside of the cover.

Goodman... | Answered on Oct 15, 2013

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