Question about Goodman GMS90703BXA Heater

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Goodman PGB042100-1 REVA Flame sensor not working; no heat

Service technician came cleaned the sensor, got heat going again. Heat was off again shortly after he left.
Tehcnician says I most likely need to replace the primary circuit board at estimated cost of $636. (Should this cost this much?)
Also had service a few months ago for contactor.
Unit is 10 years old. Repair or replace?

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  • Goodman Master
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Try national energy they will give you a price you will need make model and serial number 600 is high you should be able to get it for a lot less

Posted on Jan 08, 2009

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Goodman model PGB036075-1B will start the gas and the burner but will shut down before blowing heat. Is it a bad switch?


Hello, sounds like either a dirty flame sensor or open limit switch. First try cleaning the flame sensor by turning power off to the furnace and using some steel wool. If the flame sensor checks out good then you limit switch is opening becuase of lack of airflow. check air filter, clean blower wheel, and check to make sure the blower wheel is running at proper speed and not dragging sometimes cause by a weak capacitor.

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,Hello, Make sure the flame sensor is clean near the burners, The flame sensor is a metal rod that is on the opposite side of the ignitor. To clean the flame sensor you will need some steel wool, turn off power to the furnace and remove the flame sensor and clean it with the steel wool. After cleaning reinstall it and turn power back on to furnace.

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If the hot surface ignitor comes on and fires the burners, and then shuts back down, you need to take a look at the flame sensor. It is a ceramic rod with a metal tip that rests in the pilot flame. When heated from burners, it sends a signal to the main control module, circuit board, which ever this unit is equipped with to keep the burners on. It is a safety to shut the burners down if there is a problem. Take some fine steel wool to clean the metal tip on this and this should take care of the problem. If this does not do it, then 99% of the time you have a faulty control board or module. It will have to be replaced.It is where this flame sensor connects.It will continue to drop out of the circuit, and the fan will start and run. You're T-stat is good or the Hot Surface ignitor would not glow. You will need to take as much info you can from the unit, Goodman and the control, all numbers with you.You can purchase this part at a appliance parts house, or air conditioning parts house. Please keep me informed, I would like to hear back from you. I hope this has given you some direction to follow.Good Luck,
Shastalaker7

Dec 08, 2009 | Goodman GDS80904BNA Open Flame Heater

1 Answer

How do I clean a flame sensor on a 1993 Lennox Whisper Heat furnace. It heats,then the gas valve clicks and the flame briefly stops and starts again then the valve clicks again and the flame briefly stops...


You can sand the flame sensor but it sounds like another problem. Sounds like a limit switch or something in the control circuit, You need to have a service tech look at this. Ask for free estimate on repair. I have worked on hundreds of these units and they are sometimes tricky to work on. Lenox has come up with new controls for the whisper heat furnace to replace the old ones. If the flame sensor is bad the unit will try to light a few times and lock out and you ahve to kull power to the furnace to reset. If this is whats happening clean the sensor nd you should be ok If not you need help from a service tech.Rus

Nov 11, 2009 | Heating & Cooling

1 Answer

Exhaust fan turns on for a few min, then shuts down. No heat


There is a gas valve that controls the burner and has a flame sensor that keeps it from supplying gas when there's no flame. There's a chance that the unit overheated and caused a heat overload protector to fail, which was a safety feature to keep the unit from becoming dangerous. You may need to replace that overload protector. The pilot light may have just went out, and you'll need to light it again and make sure the gas valve is set to on. The flame sensor may be dirty and thinking the pilot is not on. The flame sensor will be a wire or probe mounted close to the pilot light. The gas valve may have failed and need to be replaced. You probably can't cause a lot of damage by just looking around in there and cleaning the flame sensor, but you're dealing with fire here, and you should leave anything like taking the gas line apart to a professional.

Oct 01, 2009 | Goodman GDS80703ANA Open Flame Mid-Size...

1 Answer

Where is the heat sensor on a goodman furnace


Heat sensor....Or a flame sensor. Flame sensor is connected to a "single" wire under the buners usually found on the left side. Heat sensors (or flame rollout switches) are found surrounding the burner box. The most common bad one will be located just above the burners. it "should" have a small reset button in the middle just between the two wires. If the furnace does light even for a short time the rollout switch is not bad.

Mar 03, 2009 | Goodman GMS90703BXA Heater

1 Answer

Goodman gmp075-3


I am confident the technician(s) have done this but check anyway.
Gas pressure 4-7 inches W.C for natural, 10 - 11 for Propane.
Air filter clean and unrestricted.
Temperature over supply plenum 140 degrees F.
All registers open and unrestricted.
Vent and intake unrestricted and not blocked.
Condensate hoses free of debris and draining.

OK now lets check to see if the furnace is staying on long enough.When it runs for a heat cycle, is the flame staying on until about 2 minutes prior to achieving the set temperature or is it cycling everyfew seconds and never reaching temp? To check you will need to view the flame through a small viewing port of thru the fins in the front door. Watch them for 10 to 15 minutes.

If they are staying on a long time, we will need to see if the room blower is working properly. If they are going out quickly and or cycling. Get the technician on the pone to talk it over. It could be a safety sensor.

If the blower stays on and the burners are on as well, you have a door open somewhere. Just kidding. Remove the thermostst documenting which wires go where. Take the white wire and cross it with the red wire. This will (or should) turn on the furnace. Clamp them together untill the either the house gets warm or you are confident it is not going to reach temperature. If it did get close to the temperature you wanted, it is a thermostat issue. If not, you got me!

And they say we have an easy job! Get beck to us with your results.

Jan 22, 2008 | Goodman GMS90703BXA Heater

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Goodman heating element does not light


The flame sensor is not sensing flame. Inspect the system as it is tying to start and see if the flames are traveling to all burners and hitting the sensor. If not, clean the burner flame rail (the trough the allows the flame to travel from one burner to the next) or if it is hitting the sensor, clean the sensor with steel wool and check all connections from the sensor to the control board.

Jan 20, 2008 | Goodman GMS90703BXA Heater

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