Question about Goodman GMS90703BXA Heater

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No heat, trouble shooting light has continious flash.

Can anyone help? Gas furnace will ignite but won't stay lit. I thought it was the flame sensor, but I replaced it and still not working? Could the be a circuit board problem? If so how can I be sure? Goodman GMPN 120-5 my goodman will ignite the burners but they will blow will cycle a few times then shut down.please help.

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Re: No heat, trouble shooting light has continious flash.

There is a vacuum sensor on most units tied from the exhaust gas fan to the sensor. Does the unit try to start? If the unit's exhaust fails to pull the switch it will turn off after about 30-45 sec after starting. "IT" thinks it's not exhausting and stops to keep from overheating. Do you have this exhaust fan and rubber hose to sensor? Can you see if that fan is turning on start?

Posted on Nov 10, 2007

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SOURCE: No heat, trouble shooting light has continious flash.

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.

Posted on Jan 02, 2007

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When I try to use my Thermolaire model SU402E, the pilot lights( and stays lit), but the main burner will NOT ignite.. any suggestions as to what could cause this if the pilot stays lit?

Bad igniter? When you 1st try it the gas valve will give enough gas that you would get the burner lit if the igniter was glowing red. If you're desperate you can light the igniter area w/ an aim n flame, but you definitely want to do that w/ caution and crank up your t-stat so the furnace stays on awhile Cuz you'll have to do it again for heat or buy an igniter($40 or so)

Jan 14, 2015 | Heaters

1 Answer

Where should the flame blow when janitrol furnace is ignite?Toward firewall?

It sounds like he incorrectly installed the igniter and it may be a huge danger to your home. A incorrectly installed igniter can cause a excess build up of gas and blow back flame or worst blow up your house. Only have a licensed heating and cooling contractor work on your furnace and not a handy man.

Nov 22, 2014 | Heaters

1 Answer

My rv fridge will lite but goes out as soon as the ignition cycle stops

You didn't state the Brand or Model of your refrigerator but it sounds like your flame sensor isn't working.

rv refrigerator won stay lit YouTube

Oct 14, 2014 | Heaters

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 | Heaters

1 Answer

Suddenly not working im not sure if there even is a pilot to be lit

Goodman have troubleshooting idiot lights on the board. Look for flashes and count em.
The flash explanations are printed on the backside of the blower cover on most models.
A sampling of various failure codes on a furnace:

Read one LED flash that stays on continuously to mean your furnace has no signal coming from the thermostat and will not operate. Turn the power off and check the thermostat for improper settings or connections.

Interpret one LED flash that blinks on and off to mean your furnace has locked out because it could not ignite after three tries, and must be reset. Interrupt power to your furnace for 20 seconds or lower the thermostat so your furnace does not try to heat, then reset the thermostat to the previous setting. After one hour of lockout, your furnace will automatically reset itself and try to operate as usual.

Decipher two LED flashes to mean the draft blower is not working, or your furnace has a short in the pressure switch circuit. Turn off the furnace power and repair a short or replace the pressure switch.

Read three LED flashes to mean your furnace has an open pressure switch circuit or it has an induced draft blower operating. Check the pressure switch hose of your furnace for blocks or an improper connection. Also, look for blockages in the flue, and tighten any loose wiring.

Translate four LED flashes to mean your furnace has a primary limit circuit open, possibly from loose wiring or blocked filters. Check and clean filters, tighten wiring and check the flue for blockages.

Interpret five LED flashes to mean your furnace senses a flame without a call for heat. This could be from a gas valve closing slowly or a burner flame lingering.

Read seven LED flashes as a warning of a low flame sense microamp signal. This could happen with a coated flame sensor or a lazy flame from poor gas pressure. Turn off the power and adjust the gas pressure according to the information on the rating plate.

See eight LED flashes as meaning an igniter circuit problem due to a bad igniter or an igniter connected improperly. Replace the bad igniter or check the ground wiring, making necessary corrections.

Decipher nine LED flashes to mean the high-stage pressure switch circuit will not close during a high-stage-induced draft blower operation. Your furnace may have a pinched or blocked pressure switch hose, a blocked flue or loose wiring.

Read continuous flashing on the LED to mean your furnace has a reversed polarity of 115 volts. Turn off the power and correct the wiring polarity after reviewing the wiring diagram.

Feb 03, 2011 | Goodman Heaters

1 Answer

Williams 3003622 Wall Mounted 30,000 BTU The pilot light goes out when the main flame shuts down. The pilot light will stay lit for days when heat is not called for but when heat is called for the furnace...

I'm having the same exact problem... At first we thought was the vent... but the way the flames goes out... it seems that there is "not enough oxygen" more than "blown out by the wind"... right after both main & pilot goes out, I can't even light any external flame inside the chamber... and it doesn't feel like the outside cold air coming in... it just feel like there is some sort of gas in the chamber that's so strong, it prevents flame... and the only thing I can think of is that it doesn't have enough oxygen, but too much natural gas, and flame can't sustain.

Nov 02, 2010 | Williams 3003622 Ceramic Wall Mounted...

1 Answer

The igniter on my york furnace stays on for a sufficient time but the heat sensor either doesnt work or the gas isnt getting through and there is no gas lighting

make shure you have the gas valve on next use a voltage met and test voltage at the gas valve wires they should have 24 volts going to the gas valve the flame sensor only comes into play after the flame is lit

Oct 01, 2010 | Heaters

1 Answer

Pilot light will stay lit Lennox G8D2-82

You may need to replace the Thermocoupler. It screws into the gas regulator and the sensor end is set in the flame of the pilot light. You can get one at any appliance parts store. The Thermocoupler simply feels the heat of the pilot light and sends a very small amount of voltage to the gas switch that opens when your thermostat calls for heat. If the pilot light isnt lit, no voltage from the sensor and no gas can be released by the regulator.
Anyone can replace one. Just find the tip that sits in the the pilot flame when you try to ignite the pilot light. Follow it down to the regulator and unscrew it. There is no gas involved. It is Ultra Low Voltage. No danger.
Be sure to turn off the power to the unit before you begin removal. Take it to the parts store along with your furnace brand and model number. If you see any identifiers on the regulator, note them and take them with. When you replace it be sure to have the sensor end up in the flame of the pilot.

Sep 29, 2009 | Heaters

3 Answers

No heat, trouble shooting light has continious flash.

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.

Nov 16, 2006 | Goodman GMS90703BXA Heater

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