Question about Goodman GMS90703BXA Heater

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Model # GMPN100-4 Furnace will not start...

Furnace will not start. Getting a continuous flash--twinning? Don't really know how to resolve this one... Any ideas? Thanks, Johnny

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When you remove the panel there reset button press on it

Posted on Jan 19, 2008


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Posted on Jan 02, 2017


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Trouble shooting your gas Furnace

If you are having trouble with you gas furnace they are really not that complicated to figure out. Most of the newer gas furnaces within the last 10+ years have a flash code on the circuit board inside the furnace. The trouble codes are in flashes. For example: 1 flash means ignition problem, 2 flashes mean vent pressure switch, 3 flashes means control board problem and so on. The first thing to do would be to check for a sight glass or window in the blower door to see if there is a flash code. Then you can pull off the blower door to check to see what the code represents. The code chart is usually located on the inside of the blower door.
If there is no flash type board in the furnace it still pretty simple to trouble shoot. First thing is verify that you have power to your furnace. You can do this by checking voltage with a simple meter. Check for voltage at the door switch since this is usally where the power starts. If there is power there then check for voltage at the thermostate between the R terminal and C for common. If there is power there then you need to go back to the furnace and try to figure out where the power is stopping. With the power to the furnace off start to check the safety switches. With an ohm meter or a test light you can start checking for continuity across your safety switchs. Check the roll out switch that is located near the burners if thats okay, Check the high limit that is usually located up higher on the front of the furnace that has two wires going to it, if that is okay then check your pressure switches and these you will have to check with the inducer or vent motor running. Hope that this information is helpful and if you don't feel comfortable using an electrical tester be sure to call in a professional HVAC Tech. to look at it.

on Dec 20, 2009 | Heating & Cooling

1 Answer

Do not get 24 volts from 120/24 volt transformer how test it?

Yes. There could be a couple of high limit safety devises in the circuit that can open the circuit to the gas valve. Pending your furnace type If your thermostat is calling for heat and the furnace tries to start your transformer is working. High limit safety controls are normally closed. If you have a open limit switch you will not have any continuity through it using an ohm meter or if you test it with a volt meter you will have 24 volts across the terminals of the safety devise. Other problems can be pressure switches, hot surface igniters and control boards. most newer furnaces have a control board that will flash a light code to help trouble shoot the system. Count the flash pattern and look on one of the furnace doors for the flash code directory.

Jan 01, 2015 | Heating & Cooling

1 Answer

Furnace wont work

Have to know the model and serial of the furnace.
locate code list usually inside or on the back of a door.
Operation sequence= call for heat--inducer blower motor--makes pressure switch--signals board to bring on hsi--after a set time gas valve opens and you have ignition--main blower motor comes on after a set time

Feb 14, 2014 | Coleman 7990-319p Evcon Gas Furnace...

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My friend is annoying the hell out of me. She is following me EVERYWHERE and talking about stuff I don't give a **** about. I can't like go off to my "other" friends cuz I don't have...

why do you hate her so much? since you just cannot leave her because you cannot leave her sister, i am thinking if you can find some good things about her and then try to like her. Or you just tell her directly do not follow you everywhere, because that really makes people annoying.

Apr 17, 2013 | Computers & Internet

2 Answers

Twinning problem

Switch the leads and also make sure that you have a good ground.

Mar 30, 2009 | Goodman Heating & Cooling

1 Answer

Furnace integrated control module

The light is supposed to be on, if there is a fault in the furnace the light will begin to give u a flash pattern... ie; three flashes...or two flashes.. on the furnace exterior or on one of the doors there should be a fault code chart.... read the chart on the unit it will tell you what light is on and when..

Jan 14, 2009 | Goodman GMS90703BXA Heater

1 Answer

York high effenciency furnace not firing all the time

has anyone worked on this furnace because the error would indicate that the positive 120 volt and the neg 120 volt is swapped , these units will also do this when the ground wire to the furnace or gas valve or furnace or @ the panel is lose , corroded , or missing , the gnd must be present to open valve , I am aware that ac is is not usually polarity sensitive but in this case it most certainly is ...have seen many time and know it to be true

Dec 27, 2008 | York Yankees Bedding MLB Comforter

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