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Keeps going flame rod installed - Heating & Cooling

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Check ground on rod, tighten burner manifold, tighten computer board and make sure everything else is tight, most of these furnaces depend on good grounds.

Posted on Mar 16, 2011


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My rheem conquest 80 furnace comes on and 5 seconds later the gas goes off, it just keeps trying to come on.

This typically sounds like a flame sensor issue. Now, just so we are on the same page, the flame sensor( flame rod), its the rod that is opposite of the ignitor. Now that we have confirmed that, try cleaning the rod with some fine sand paper, nothing too gritty. the goal here is to try to clean any carbon buildup on the sensor that has created all these years of being directly in front of the flame. carefully. So give it a good cleaning to make it look new again but care not to clean too hard so you don't break it. Its best to take the flame rod out and do it and re-install it. If that does't work, try replacing the flame rod. The controller isn't getting any signal back from the flame sensor signifying flame is present. Try this first. Always turn power off when working on electrical equipment.

Dec 03, 2017 | Heating & Cooling

1 Answer

Coleman dgaa furnace lights then goes out

If your talking about taking out the flame proving rod and cleaning it with sand paper or abrasive cloth and that didnt work, you may have a bad flame proving rod and it needs replaced. If the flame sensor is good, it could be the board not keeping the call to the gas valve, the gas valve not keeping the call, or your thermostat not keeping the call. Hope this helps narrow it down.

Dec 07, 2013 | Coleman 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

1 Answer


Flame rod dirty or bad, flame tray not allowing flame to travel to all burners quick enough, look for error codes on PC Board and research code from wiring diagram on reverse side of front panel. The flame rod is a small probe located in front of the last burner that ignites and is heated by the flame. It will have only one wire going to it and goes from rod to PC Board. Take a tooth brush and scrub it in place. If it continues, change it but inspect wire first. Blow out any debris in tray that allows flame to go from first burner to all others. A good shot of air will work.

Mar 07, 2011 | Goodman Heating & Cooling

1 Answer

I have a monitor 2400 and it is flashing code E01 anyone got an clue what that means

E01 means the flame rod is sensing a flame when there shouldn\'t be one. This is caused by a grounded flame rod or pinched wire. For some reason the flame rod could be touching metal inside the heater. The flame rod could be bent or the burner ring is warped so much that it is touching the flame rod. Another possibility is the wire for the flame rod has somehow gotten pinched. If you remove the front cover and the black grill from the heater, you can see the window into the burner. The plate it is attached to has about 10 screws holding it on. You can remove the plate using caution not to damage the gasket and look into the burner to see what is going on. The flame rod should be centered between the burner ring and the burner. Let me know what you find. If you need to order parts I can help you with that.

Niten\'s Heater Service on Facebook

Jan 17, 2011 | Heating & Cooling

2 Answers

Hi I have a rinnai flame fire royal model ib35etr It keeps going out and flashes number 12 on the screen we are moving and packed the book

I had this same problem last year and went through all the checklist in poshpoms suggestions ( I am on mains Gas ). The issue was caused by the Flame rods. Near the 2 pilots at the front and the back. Those small rods each that 'senses' the flame become inadequate, so they were replaced with a new pilot assembly from Rinnai that had longer rods and better coverage. Issue was fixed. Good Luck.

Aug 23, 2010 | Heating & Cooling

2 Answers

Bosch SX 250 Lp. I get EA code and will not start. Was very windy last night. Does anyone know how to correct this issue?

EA & EC are telling you that the flame is not covering the flame sensor rod.
Take the front cover off by unscrewing the 2 phillips head screws about 1/2 way down the cover and may be covered by a plastic plate that unsnaps.
Locate the flame inspection glass window near the right side above the control panel. Prepare to observe the flame from start, until the error appears. Visually locate the flame sensor rod: there are 3 rods that pass through the plate below the burner - it is the right most of the 3, angle your head so you can focus on this single rod. Begin water flow by opening a valve or the pressure relief valve that should be outside the cabinet, at the bottom.

Did the flame ignite? it should make several tries before an error.
if it ignited, did the flame cover the flame rod, or did it jump up over it leaving the rod in clear gas below the flames?
In the LCD display, upper right corner, is an indicator in the shape of a flame. It is visably displayed when the flame is covering the flame rod, indicating that the flame is being detected by the electronics. If the flame covered the rod but the indicate is not on, the rod itself may be dirty. Remove it with the other 2 ignitor rods and careful clean the sensor rod with something like steel wool to remove the corrosion. Re-install and test again. If that didn't fix this condition, your control circuit is faulty.

If you find that the flame jumps over the rod and doesn't emerce the rod, check the draft vent pipe for any obstructions, water, bird nest, etc, and any obstruction of the combustion air supply. Check the the gas blower starts up, check for water or white dust in the clear tubing that attaches to the black blower intake from the gas meter.

Otherwise, you will need to follow the procedures to adjust the CO2 and this WILL require a combustion gas analyzer! If you are at an elevation above 2,000 feet, expect to make this adjustment.

Jun 05, 2010 | Bosch AquaStar Indoor Natural Gas Tankless...

1 Answer

Our furnace keeps shutting off the flame due to

Gain access to the flame rods and make sure the orfices are clean - use a can of compressed air/air compressor with a blower nozzle. Make sure there's no dust or debris in the flame rods.

Feb 07, 2010 | Heating & Cooling

1 Answer

My Rheem gas furnace has been having trouble with igniting, the ignitor will grow red and start the small gas rod burning, but within a second then the flame will go off. It will keep trying to ignite but...

Check to see if you have flame rod on your unit. It will be a small rod that is inserted into the flame. if you have this clean the rod with some sand paper.

Dec 15, 2009 | Heating & Cooling

4 Answers

Toyostove Laser 56 EE 2 error


I have been working on Toyo's for 14 years now. During this time I have never seen a flame rod that was bad except ones that people have broken themselves. The rod is just a piece of heavy wire that is insulated against the pot. It is almost impossible to mess it up. Now, that being said, you can have a problem with the flame rod being dirty or sooted. Since your stove is so new I would look at the fuel system. If it is clean I would go after the burner mat. There have been mats lately on new stoves that have caused them to soot up. When this happens the flame rod gets covered with soot and gives the EE2 message. A new stove that has a burner mat problem would be covered by the warranty. Bad fuel that causes a problem will not be covered. The other thing that is not covered is a stove that has had an iced up the exhaust pipe. A good dealer should be able to help you get the stove going and explain the warranty.

Tom Hawkins

Jan 06, 2008 | Rinnai Toyostove Direct Vent Heater:...

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