video included - Furnace ignition problem - help -


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Old 12-03-08, 05:14 AM
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video included - Furnace ignition problem - help -

I have an older Carrier furnace that will ignite and burn for a couple minutes, shut off for a couple minutes, then re-ignite, etc...

I posted a video for you too see; you can FFWD through the dull parts.

Furnace Problem


Really appreciate any advice!!

Jay
 
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Old 12-03-08, 09:40 AM
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Hello Jay!

is the main blower running? I can't really tell.. Also, what is the full model #? I think you said 58SSX100....

Do you have a meter to take a reading for us?
 
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Old 12-03-08, 11:57 AM
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Is the blower runniing? I think I heard it? If it is ,than do you have a multimeter? from what I seen in the video if the blower is running, Than I would check the high limit . I worked on a carrier yesterday that was doing something like this .
please post back
 
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Old 12-03-08, 01:06 PM
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That model used a pilot assembly with a thermal switch, evident by the multiple wires. Besides the pilot flame looking weak, the reduction in pilot flame during fire along with a probable warn out temp switch thinks the pilot is out which shuts off main burner
 
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Old 12-03-08, 03:47 PM
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Originally Posted by ZL700
That model used a pilot assembly with a thermal switch, evident by the multiple wires. Besides the pilot flame looking weak, the reduction in pilot flame during fire along with a probable warn out temp switch thinks the pilot is out which shuts off main burner
Bingo me thinks
Yes the pilot is weak..if you look at the pilot flame you will notice a crisp line around the flame. That indicates the pilot pressure is ok, howerver the pilot orifice is restricted. When the burner comes on it pulls the pilot flame away from the bi-metal strip and when the strip cools it warps back to the original start postion and the main burner goes off because the electrical circuit has opened. Then the pilot heats the bi-metal and the burner comes back on. The orifice needs to be removed and cleaned NOT enlarged.
 
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Old 12-03-08, 06:37 PM
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It is a 58ss100-bc series 110

Yes, the blower is running the entire time regardless of the burners or the pilot being on.
 
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Old 12-03-08, 07:42 PM
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Do you have a meter to check voltage on the flame sensor head?
 
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Old 12-03-08, 08:28 PM
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Here is how to verify the flame switch (pilot) is the problem.

Disconnect the pilot harness down at the pilot. With the thermostat calling for heat install a jumper wire in the harness yellow and green holes you just seperated the pilot from. When the pilot lights remove the jumper and install in the white and yellow holes and leave it there for the duration of your test. If the burner continues to operate you have confirmed to either clean the orifice or replace the entire assembly.

When I say yellow-white -green I mean those are the colors of the wires at the flame switch.
 
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Old 12-04-08, 05:06 AM
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yes I do have a volt meter, I will take a reading. I am assuming the flame sensor head is right there by the pilot light. I will get to that tonight

Thanks people !!!!!
 
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Old 12-04-08, 08:15 PM
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OK so I go down there tonight to watch for the bimetal strip to bend back to the original position. and of course the stupid thing runs for 10 minutes straight with no problems!!!

I got sick of sitting on the cold floor.
 
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Old 12-04-08, 08:47 PM
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Originally Posted by SoMNyourselfer
OK so I go down there tonight to watch for the bimetal strip to bend back to the original position. and of course the stupid thing runs for 10 minutes straight with no problems!!!

I got sick of sitting on the cold floor.
Remember to sit on a cushion
 
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Old 12-04-08, 08:56 PM
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Originally Posted by SoMNyourselfer
I got sick of sitting on the cold floor.
Cold? We haven't even gotten down to -20 yet..


Where are you out of?
 
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Old 12-05-08, 07:40 PM
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very true, we have a lot colder days ahead!!

I am in Mankato.
 
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Old 02-15-09, 08:26 PM
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SoMNyourselfer,

Did you ever figure out your problem? I am having the same issue with my burners/pilot, but mine hasn't solved itself!
 
 

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