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My furnace keeps faulting out. It says ignition lockout due to retries. What does this mean and what would I do to fix it?
M Oglesby :
Hello, would this be the result of a dirty flame sensor
Yes. The flame sensor needs to be cleaned with a piece of emery cloth or sandpaper.
Is that about the only thing I should try
That is the only thing that it could be unless your control board is bad.
Ok thanks and I will try that. Everything else on the furnace seems to be in proper working order. This problem just occurred over night
But I am pretty sure that is the problem
Ok, thank you
The flame sensor should have only one wire and is located in the path of the burner jets.
The igniter has two wires.
Ok my burner has two elements on each side and they both have two wires going to them both. That is all I see on that box
Describe to me how the elements look?
It is a coleman furnace if that makes a difference
The flame sensor rod is a small thin steel rod that is straight or L shaped.
They have two prongs on them with electric connectors hooked to them
Ok, I will have to pull this and see if it is the rod you are speaking of
You were right. I guess my next question would be, would you be able to tell me were the flame sensor is?
It is usually located near the pilot igniter or in the path of one of the burner jets.
Locate it and let me know if you find it.
I have a small box about 10wX6dX4t. It has a sight glass were you can see the pilot come on but the only wires attached to it are on the left and right side of the box. Both of these have two wires going to them. Same color wires at that and these when unscrewed from the box they are just flat little round plugs.
Ok give me a few minutes.
Ok, I found that flame sensor. Took it out and used some emery paper, cleaned it and put it back. Reset the fault and fired it up and I'm still getting the same fault ignition lockout
The flame sensor is in good shape. It had very little amount of debris on it
You have to scrub it very very good.
That was quick.
So even if it looks clean it still might need some more scrubbing?
That is correct. Especially on the tip of it.
Yes, it was kind of hidden but it was right on top of that box all the way to the back
Should I be worried about cleaning it too much or give it a good scrubbing?
Give it a good scrubbing.
See, I didn't concentrate so much on the tip. I will try it again
If cleaning it does not correct your problem, you will have to call a technician.
Yes, that didn't do the trick and it is clean. Looks brand new. Otherwise you think it was what?
I have a technician on the way
I apologize that we could not solve your issue.
Do the burners ignite at all?
Yes, the burner ignites but it kicks back off. It does that three times and then faults out
It could be a number of things.
It could be a loose or broken ground wire some where
Or it could be that the control board is gone bad.
Ok. Those control boards are probably pretty expensive
The control board itself will cost about $175.
The labor will be another $200
The other thing I noticed is, usually when I had this problem I would throw my thermostat on and off and it would work great
Well whatever it is hopefully the technician will find it.
Well, thank you
You are welcome!