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Old 10-23-2011, 07:26 PM   #1
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Trane xr90


I bought and installed two years ago and have had no problems with it. Last week I turned on the heat for the first time this year everything was working well until yesterday. After the heats been off for some time and tries to fire for the first time the burners will not stay lit. It lights and will fire for about 3 to 5 seconds then shuts down. It will do this for 3 times then lock out. Iíll reset and it usually fires and stays lit on the first try. Anyone have an idea on what could be bad? I was thinking control panel.
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Mike

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Old 10-23-2011, 07:40 PM   #2
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Trane xr90


Only a 3-5 second burn is almost always a flame sensor that needs cleaned.

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Old 10-23-2011, 09:03 PM   #3
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I cleaned it with sandpaper and it's doing it every time. It stills lit after I reset it.
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Old 10-23-2011, 10:03 PM   #4
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Should never clean it with sandpaper. What reading are you getting from it?
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Old 10-27-2011, 07:04 PM   #5
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OK I put in a new flame sensor, works better but it will still go into lock out every now and then.
Thanks for the help
Mike
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Old 10-27-2011, 08:01 PM   #6
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Trane xr90


remove and clean the burner faces. Also ensure there is a ground attached to the burner box... should be near the manifold screws on side or the other.
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Old 10-29-2011, 06:25 AM   #7
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How should you clean the burner faces?
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Old 10-29-2011, 08:17 AM   #8
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remove the burners and clean the faces with a steel brush....

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