Question about Goodman GMS90703BXA Heater

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Goodman GMP050-3 System was working Fine the all the Sudden Gas stopped Uniting Comes on first Vacume Blower Starts Electroni Ingigator Comes On Gas wont Trouble Light Flash seady Contunious Blick Red Steady One after Another with no 1-7 Flash Just contunious Service Panel States Incorrect Twining Reverse on transfoemer Was working Fine What the Heck Can some Explain and Help Thanks Stauts Light Code in the Panel States Rapid Contunious Incorrect twining Check Reverse Transformer Secondary Leads or Could this Be a Rool out Switch Problem There appears to 4 switches on the diagram

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If you do not have two furnaces hooked together, you have a bad circuit board or an improper ground or neutral wire.

Posted on Dec 10, 2008

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Why is my furnace not comining on


there is something wrong with the igniter circuit
as if it wont ignite the safety system will turn the gas off
perhaps its micro controlled and will need the error also cleared

i think some pilot or as i say thermocouple has failed

Dec 09, 2014 | Heaters

1 Answer

Furnace starts up blower starts..nothing ignites...then shuts down. repeats and doesnt stop...sanded igniter stick and nothing happend. flashes red once.


Do you see the actual ignitor glow? You must be saying that you sanded the sensor. The ignitor, after the little inducer fan comes on will begin to glow a bright orange until the burner lights. If the ignitor is broken, you will NOT see a glow, and you may smell a faint smell of gas.

Apr 14, 2011 | Goodman GMS90703BXA Heater

1 Answer

Ruud Silhouette II Gas Furnace, purges, lights burners and burns until the blower starts and then burner stops and does not really blow very warm air. Once blower shuts off, it starts the process all over...


I would be looking at the heat exchanger. They are designed to have the heat from burnt fuel flow thru them. Cracking or pin holes will let the super heated air into the furnace interior and in there you have some over heating protection some look like buttons, older they look like an external thermostat, and these get the hot gas from the burners and trip then the furnace shuts down. When the furnace comes on again some times the blower will come right on because the sensor says hey this thing is hot when in fact it isn't. This also can and if bad enough will cause carbon monoxide poisoning, please inspect this closely or have a professional look at this. There is no price ever to great to replace a human life.Sorry probably not the answer you wanted but better safe than sorry!

Dec 20, 2010 | Heaters

1 Answer

I have a Goodman GMS90904 and it's been working great for about four years. All of the sudden, i realize it's running a lot, so upon inspection, what's really happening is that it's firing up, the flame...


Even though this furnace is newer, I highly suggest a licensed tech make sure that this problem is not due to a breach in the heat exchanger causing the flames to go out when the fan comes on. That said, first check that the filter is clean and then check the flame sensor rod. If there is "chalky" build up on the end remove it with sand paper. If this cures the problem then purchase a new flame sensor for a more permanent repair.

Nov 28, 2010 | Goodman GMS90703BXA Heater

2 Answers

Ruud Silhouette II Gas Furnace, purges, lights burners and burns until the blower starts and then burner stops and does not really blow very warm air. Once blower shuts off, it starts the process all over...


Flame sensor needs to be cleaned. turn off the furnace power switch or breaker. pull the flame sensor located in the burner runner section of the furnace. It will be easy to locate because it has 1 wire running to it. pull the screw being very careful not to harm anything else. get the sensor out. inspect it for cleanliness. clean the sensor with light grade sand paper gently. re-install the sensor plug the wire back on. restart your furnace and this should fix the problem.
CookHVACR

Nov 19, 2010 | Heaters

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

I turn the thermostat on and the furnace tries to turn on three times before it turns itself off. The first time I see the gas blower turn on but it does not light the furnace up. The next two times I do...


This on blink of the light is a system lockout. It is caused when no gas is released to light the burner. The first thing to try is to turn the power off to the unit make sure your thermostat is off also. Turn the unit back on and make sure your gas is turned on. Then turn on the thermostat. Try this 3 or 4 times to make sure there is not air trapped in the gas line preventing ignition. If it lights after doing this you should check for a small gas leak at all fittings and shut off valves. The reason for this is to make sure you do not have a slow leak. If you smell gas turn off the furnace and your gas main valve and call a repair person. If you are unable to turn off the gas you should call the utility immediately. The cycle for your furnace is as follows. When your thermostate demands heat a signal is sent to your circuit board in the furnace and it turns on a exhaust fan to cause a draft to push air out the flu. (this fan is on 92% and higher funaces) This fan has two vacume lines that run to two vacume switches one is for the presence of vacume the other is for sensing the release of vacume. These are low voltage switches hooked into the 24v system. If the fan works and the switches sense vacume it then turns on the gas igniter this will be a glow bar and you will see it glowing. This in turn has a sensor that near it that can sense the heat from the glow bar igniter and it in turn turns on the gas by sending the 24v signal to the gas valve. If after 8 to 15 seconds the flame does not come on the system will reset and try again for a total of 3 times. If any of the above systems do not work your furnace will lock out because it thinks there is gas being dumped into the furnace. If the exhaust fan comes on you have 24v going thru your thermostat to the furnace. Then the vacume switches have to work. One is normally open the other normally closed. If you have a volt/ohm meter which can be purchased for as little as 10 to 15 dollars at a hardware store you can check these switches. You will need to set the thermostat to off and turn off voltage to your furnace for safety. Then locate the two switches by following the black rubber vacume lines from the exhaust fan housing to the switches. Pull the wires off the switches and with the meter set on ohms place the leads on the two terminals. While the meter is hooked up pull the vacume line off the fan housing and **** air in and out of the line the meter should swing back and forth as it senses vacume and the lack of it. If it does it is working. Then do the other vacume switch. Make sure to keep your wires and where the vacume lines go straight. You will also see a sensor mounted above and center where your burners are at it will have two wires going to it and it will be round it should show continuity ck it by removing the wires form it and touching the meter leads to the connectors the meter should respond showing continuity. There are two others under the burners on each side ck them the same. If any of your sensors have a pop ot button in the center press in on it yours should not this is an older version yours should be self reseting. The only other sensor is located in the blower for circulating the air. It is located on the right hand side of the blower housing with a red and yellow wire going to it. It has a reset in the center this sensor is used to trip if the heat in the blower housing gets to hot. This happens when the blower motor quits or is not able to move air fast enough due to restrictions. If the sensor has tripped you will feel and should hear an audible click when you press on the center button also if you check it for continuity it will show none and when you press the button it will show continuity. The next thing is the gas valve If all of the above work it is either the gas valve not opening or your circuit board. All of the parts are inexspensive until you get to the circuit board and the gas valve. The gas valve should be replaced by a repair person. You can replace everything else just make sure you turn off the power and pay close attention to the wiring. I hope this helps good luck. But not to down play the above make sure te top panel is in place put your hand on the gas valve and have someone turn on the thermostat. If the exhaust blower comes on and the ignitor glows you should then feel a click from the gas valve if you do not it us normally the circuit board. If you do and it still doesnt light you have no gas coming to your furnace. I hope this helps good luck

Sep 11, 2010 | Goodman GMS90703BXA Heater

2 Answers

Hi i have a 431 and its have trouble starting the fan starts ok but when it comes to start clicking to egnite the gas it only clicks once or twice but wont fire the gas up but the gas i can hear comeing...


http://www.rinnaisales.co.nz/tradesmart/rinnai2/pdfs/service_info/550.pdf
above is a service manual, it will help toy troubleshoot and hopefully repair your unit. Be careful, if in doubt, call a certified gas fitter.
I would suspect, the thermostat, or some other sensor, as this is usually what's wrong.

May 08, 2010 | Rinnai RHFE-431FAIII 16,700 BTU Direct...

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