[Trane XR90 Light Flashing] Kgough


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Old 11-30-15, 07:16 AM
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[Trane XR90 Light Flashing] Kgough

Looking for info on Trane XR90, indicator light flashing 4 times. Don't understand which limit is the problem.
 

Last edited by ray2047; 11-30-15 at 09:16 AM. Reason: Add a meaningful title.
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Old 11-30-15, 09:23 AM
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Welcome to the forums.

Remove the burner access door and on the side wall you'll see an ID tag. Post the complete model number for your furnace.

Usually there are two limits switches with yellow wires. Usually a limit fault signifies an airflow problem. Check your air filter first as well as making sure the returns aren't blocked and too many registers are closed.

Turning power off and then back on to furnace will reset the code.
 
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Old 12-02-15, 01:25 AM
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Kgough

Problem solved! Discovered filter hadn't been changed for a while and caused the limit located at the top of the unit to stick open. Tapped on limit and everything started working.
 
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Old 12-02-15, 09:09 AM
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Good everything is ok. Try to make filter replacement a part of your maintenance program.
 
 

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