Question about Jandy Lite2 LJ125 Ceramic Gas Heater

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This is an LJ175. Burner would not light, ordered and replaced the flame sensor. Burners light, run for 10 sec and shut down. After 3rd trial a code of FL2 blinks. Please help

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Check too see if you are getting signal back too control brd if you are replace the control brd

Posted on Sep 16, 2010

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1 Answer

Goodman furnace furnace starts,flames start and shuts off after 10 sec. Replaced flame sensor still have same problem


if flame sensor is new, the board may not be properly recieving currrent from flame sensor to keep burners on

Feb 05, 2014 | Goodman Heating & Cooling

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Baxter OV-210G burner cycling on / off @ 90 sec, repeating after new burner blower


You need to clean the flame sensor or replace the flame sensor.

Sep 30, 2017 | Heating & Cooling

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Burners kick on for 10 seconds then kicks off will keep repeating this


Hello, sounds like the flame sensor needs to be cleaned with steel wool. The flame sensor is a metal rod located on the opposite side of the igniter that senses the burner flame and will keep the Furnace running, what happens is the rod builds up oxidation and then cannot sense the burner flame and will shut the burners down and keep repeating. Just remove the sensor and clean with steel wool and reinstall.

Dec 08, 2011 | Weather King 10AJA3001AH Air Conditioner

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Inductor blower comes on and runs then the ignitor glows flame comes up and burns for approx. 10-15 sec then goes out then fan comes on. Model number is PBKMLB12N0B0F I believe this is a goodman furnace.


I cleaned the sensor that was at the the right further most burner on my Goodman and it worked. got the answer to my problem here at fixya. My burner flame only lasted 5 secs before it shut off. Thanks to all who took the time to send me a response.

Nov 13, 2010 | Goodman Heating & Cooling

1 Answer

Carrier furnace ,burner not staying on after 4th try shuts down completely.cleaned the flame sensor but noticed the 3rd and 4th burner has a delay in lighting by the time the 4th burner lights and hits the...


Remove them and scrub them with a wire brush.
On a call for heat, the 24 volt thermostat sends a signal to the control module. The control module will indicate a call for heat with a light on the control either blinking or remain solid depending upon model. The inducer (exhaust) blower will purge all gasses from the furnace and pressurize a pressure switch. Once the pressure switch tells the module to continue, the electronic ignition will energize and send 120 volts to the igniter. The igniter will glow and you will be able to see it if viewed thru the small inspection port. Once the igniter gets hot enough, it sends a signal to the module opening up the gas valve (24 volts). Either a pilot will come on or the burner tube will ignite then spread the flame to all burners. Lastly a safety sensor will be looking for a certain temperature within a few seconds and the furnace will continue to operate and the room air blower will turn on in a minute or two.

What could go wrong? The unit will not run if there is no signal from the thermostat (bad thermostat or broken wire), the control module does not sense a signal from the thermostat (bad control), the inducer does not energize (bad motor), the pressure switch does not close (blocked vent piping, bad switch, plugged condensate hose), the igniter does not energize (bad control, bad igniter), the gas valve does not open or there is no gas (bad gas valve, broken wire, no gas), the pilot does not light (dirty pilot), the burner does not light (bad burner, plugged orifice, not enough combustion air), the flame does not spread to each burner (bad flame spreader, dirty flame spreader, more bad burners), the flame safety sensor does not detect flame (dirty or bad flame spreader, bad flame sensor, broken wire, bad control), or the room air blower does not energize (bad fan motor, bad control).

Jan 10, 2010 | Carrier XHB123D X/Y Series Heat/Cool Air...

2 Answers

Gas furnace, main burner ignites the other 2 don't. then shutdn.


Between the burners is a small rail in the pressed steel where the flame runs across to light the other burners and it sounds like there is dirt or debris in the step over rails causing the problem. You will need to use some compressed air on those rails to clear them out. Once the rails are clear the other two burners should ignite right away.

Dec 21, 2009 | Heating & Cooling

2 Answers

FURNACE COMES ON AND SHUTS DOWN WITHIN 15 SECONDS


On a call for heat, the 24 volt thermostat sends a signal to the control module. The control module will indicate a call for heat with a light on the control either blinking or remain solid depending upon model. The inducer (exhaust) blower will purge all gasses from the furnace and pressurize a pressure switch. Once the pressure switch tells the module to continue, the electronic ignition will energize and send 120 volts to the igniter. The igniter will glow and you will be able to see it if viewed thru the small inspection port. Once the igniter gets hot enough, it sends a signal to the module opening up the gas valve (24 volts). Either a pilot will come on or the burner tube will ignite then spread the flame to all burners. Lastly a safety sensor will be looking for a certain temperature within a few seconds and the furnace will continue to operate and the room air blower will turn on in a minute or two.

What could go wrong? The unit will not run if there is no signal from the thermostat (bad thermostat or broken wire), the control module does not sense a signal from the thermostat (bad control), the inducer does not energize (bad motor), the pressure switch does not close (blocked vent piping, bad switch, plugged condensate hose), the igniter does not energize (bad control, bad igniter), the gas valve does not open or there is no gas (bad gas valve, broken wire, no gas), the pilot does not light (dirty pilot), the burner does not light (bad burner, plugged orifice, not enough combustion air), the flame does not spread to each burner (bad flame spreader, dirty flame spreader, more bad burners), the flame safety sensor does not detect flame (dirty or bad flame spreader, bad flame sensor, broken wire, bad control), or the room air blower does not energize (bad fan motor, bad control). When all else fails, check the ground connection for corrosion.

Nov 23, 2009 | Heating & Cooling

1 Answer

Goodman furnace seems to be cycling too often. Burner not staying on long enough to put warm air into system. Burner quits after a few seconds then repeats.


dIf the burners are only staying on for about 5 seconds, you proably hav e a dirty flame sensor. Watch the burners light, the glow plug will light one end of the burners, in front of the last burner to light the will be a small thin rod, this rod must sense the flame or the gas will be shut down. Take a piece of steel wool and gently cleqan the rod.

Oct 11, 2009 | Goodman GDS80904BNA Open Flame Heater

1 Answer

I hav a armstrong direct air furnance and when i call for heat the burners stay on for about 10 secs then go out and after the 3rd try it shuts itself off


Sounds like the flame sensor is dirty. Carbon builds up on the surface and it just takes a very small amount to block the sensor. Take some steel wool and very gently clean the surface off. The sensor is located at the last burner in line. Looks like a thick piece of wire just sticking down. Let me know how it goes. ken

Jan 14, 2009 | Heating & Cooling

3 Answers

My goodman gmt090-4 shuts off about 10 sec. after burners ignite


Check the pressure sensor. I tapped on mine a few times, removed the hose and checked it for blockage and replaced. It has been working fine since. I do have a new sensor on order.

Oct 04, 2008 | Goodman GMS90703BXA Heater

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