Picture of flame rod&heat sensor on goodman gmv95 furnace

The relay for the motor is stuck or the points inside the relay are arced closed. Replace the relay.

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Hello,sounds like you have a dirty flame sensor. This is a metal rod on the oppositenside of the hot surface ignitor. turn off power to the furnace and remove the flame sensor, then use steel wool and clean the flame sensor and reinstall. Next turn back power to Furnace.

Cycle the power first & see if the furnace goes through the normal sequence of order. On a call for heat, the vent inducer motor should turn on and the pressure switch should prove negative draft in the heat exchanger. the board then should power the ignition phase whenter it is hot surface ignition, or spark, you should hear a spark or see the orange glow of the ignitor & the gas valve is timed to turn on. If you have proper gas to the furnace, it should allow the gas to flow through the gas valve & ignite the flame. Once the flame is ignited, the romote or local sensor should sense the flame & the blower then kicks on from the time delay in the board. If you don't have any ignition, then something is wrong with either the ignitor, ignition module, pressure switch, or you have a manual limit that is tripped(this looks like a small 1/2 inch disc with a reset button on it) If you have ignition & the flame lights, but drops out, then your flame sensor is dirty & needs a touch of sand paper to clean it up(this looks like a 3 inch metal rod opposite of the ignitor) Make sure your power is off when you clean the sensor if you need to. Also if there is no ignition & the vent inducer motor is running... if it is hot surface igniton, there is a molex plug on the leead wires to it- disconnect & check continuity- should be under 110 ohms.

,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.

Hello ,
"Usually" a faulty flame sensor will cause the unit turn burns off and on. The furnace usually goes through its start up and burners turn on as they should then if the flame sensor/rod doesn't to sense anything and the furnace doesn't get a signal it will usually cut the burners off and re-attempt the burner sequence again because it looking for that signal from the sensor. The flame sensor is usually located opposite of the ignitor. The flame sensor/rod is usually in from of the burner. Sometimes you can get away with "GENTLY" cleaning the flame rod with some sand paper since its always in direct contact with the flame. Try to get it looking nice and new but do clean too hard as it may break which Iv seen. Make sure you turn off power to the furnace before working on it. Work safe.

Now, as for the LED error light. Usually the owners manual will have something in the troubleshooting section referring the the LED error lights. Perhaps it may have a different issue which corresponds to the LED indication. I would start here first to get you going in the right direction. If it does mention something about the flame sensor/rod then proceed to do the above that I mentioned. Worst case scenario if it does mention this, you will need a new one.

Hope this helps.

You did not mention how long the main burner stayed on. If it stayed on only a few seconds, most likely you have a dirty or bad flame rod. The flame rod is located in the flame path of the last burner to ignite. Take a toothbrush and scrub off any debris that may be on it. Also check all the wire connections from the rod back to the circuit board.

Good one! Is the flame getting to the flame sensor within the few seconds? Maybe a good cleaning of the burners or flame tray would help. 1.3 ma is enough for the flame rod to tell the board to stay on. Re-do all the ground connections both at the board and furnace cabinet to be safe. Check the polarity of the power going to the furnace. What are the chances the second board is bad?

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.

Sounds like it coud have been a flame sensor. the limit switch is usually near the top of the heat exchanger.