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obeperalta
Community Member
since ‎07-11-2025
‎07-15-2025

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E Nest Thermostat does not detect W1 wire and show E155 error

07-11-2025
Hi, I have an E Nest Thermostat working properly for some years and suddenly appears the E155 error code. Te connection diagram showed as the W1 wire was not conected.Following the many troubleshooting procedures, i checked:-The correct wire connecti...