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(ESM) (ET) INDICATES CORRECTIVE ACTION*
ERROR CODE DIAGNOSTIC LED
9, 10, 11 or 12 FLASHES Electronic Thermostat (ET) error
(Red)
E9
El0
Ell
E12
1. Turn off electrical power.
2. Check wiring at Electronic Thermostat (ET) for damage.
3. Turn on electrical power at breaker.
4. If this code flashes condition continues, replace the Electronic
Thermostat (ET).
*These instructions are brief and intended as guidance for a qualified person. If you lack the necessary
skills to perform these procedures call 1-877-817-6750 for assistance.
2O
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