Igniter air gap


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Old 01-30-13, 03:44 PM
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Igniter air gap

I have a 4YCY4036A1075AA Trane furnace that when weather is rainy wil start and shut off. I cleaned the igniter #IGN00130 and the flame sensor SEN00297 with sand paper but the air gap looks large 5/16". Is this correct?
 
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Old 01-30-13, 06:20 PM
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Unlikely to be the problem.


Describe the sequence of events that occurs when the thermostat call for heat, in order and in detail.

Do the same thing when the furnace is failing to ignite.

Very likely that will help to identify the reason why the furnace isn't turning on reliably.
 
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Old 01-30-13, 06:29 PM
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Blower starts , burner ignites, runs for a few minutes 2 -3 and then goes out. When i trip the breaker it will start and run until the next restart. Only does this in wet weather but no water gets into the heater housing.
 
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Old 01-30-13, 06:39 PM
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WHAT blower starts?

What continues to run or stop when the burners shut off?

I would recommend that you take the cover off the burner compartment of the furnace and carefully observe the sequence of events that occurs, perhaps several times until you understand in detail what is happening and can report that in detail and in order here.

It sounds like you have an intermittent problem that will probably continue to get worse. It's unlikely that this is actually related to the weather. If you cycle the furnace through the ignition sequence repeatedly you will likely be able to observe the ignition failure.
 
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Old 01-31-13, 09:29 AM
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It only does the flame out when its raining out and there is no evedence of water in the burner or control area. I have cleaned the igniter but i think the gap is large, the burn sensor is clean also.
Does the burn sensor need to be in the flame? also is the igniter firing all the time the burner is lit?
Just trying to check on the basics first.
 
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Old 01-31-13, 01:24 PM
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Sorry. Can't help you if you don't provide the information requested.
 
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Old 01-31-13, 01:34 PM
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Well it has run fine since Monday when i cleaned the igniter and heat probe but it hasent rained.
What is the gap supposed to be on the igniter?
 
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Old 02-20-13, 01:12 PM
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Well the furnace has run fine until today and its raining and the burner quit again. I retrieved the code and its 2 blinks = system lockout no flame. What causes this?
 
 

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