Question about Goodman GMS90703BXA Heater

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Flame sensor hello my problem is the same as others. My heater will ignite but will not stay lit once blower kicks in. Cleaning the flame sensor sounds like a good answer. but where is it located. thanks

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  • Anonymous Mar 27, 2014

    Blowers comes on but flame ignites but goes out after a couple seconds. After 3rd try itnshuts off completely.

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The flame sensor is located in the burner box of this unit. You may have to remove a cover plate to get to it. It will either look like a small probe or small diameter copper pipe (real small).

 

It will either be close to the pilot or ignitor or aways away where the flame has to travel to it.

 

A small brush or sand paper can be used to clean it.

 

If your furnace has more than one burner, while you are inside, clean out the track that allows the flame to travel to each burner. A small can of compressed air works great along with a small wire bruch.

Posted on Oct 16, 2007

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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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look for the flame sensor , its a small metal rod in front of one the burners you need to sand it with some sandpaper and it should stay lit. attached is a pic of what it looks like.



fscanlan_0.jpg

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My furnace lights but only stays lit couple sec can hear a click then goes out


Sounds like it is not proving flame, to check you need a meter that will read DC microamps. without knowing the brand I can't say what you should be looking for. Trane furnaces need at least 1 DC microamp to prove presence of flame. Usually you will see 2 - 2.6 or so, but it depends on what the manufacturer specs to prove flame. At minimum you can pull the burners out and clean them really good (especially the cross-over wings) because if the flame doesn't roll down to the sensor fast enough during the trial for ignition it will recycle and eventually lockout. If it stays lit longer than 20 sec, it most likely is proving flame and cycling off on high limit because the blower is not coming on. The typical blower on delay is 45 sec from the time flame is proved to when the blower is energized

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