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  1. #1
    Join Date
    Oct 2008
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    Trane Error Code

    Hi all. I have a Trane XL19i installed in my home. The other night, the AC stopped working and the thermostat was blinking red (its a ComfortLink thermostat). It was displaying two error codes, #89 and #90. Does anyone know what these codes mean? The system went back on by itself a few hours later, so its working right now. I have a call into my hvac company asking about this. Thanks.

  2. #2
    Join Date
    Aug 2004
    North Richland Hills, Texas
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  3. #3
    Join Date
    Jul 2009
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    I had an err 91 code a while back. it turned out the installers had one too many wire nuts on the 24v dc lines causing one to back off. took the techs 2hrs to trace it down...

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