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Mark Henley
Mark Henley, Journeyman Technician
Category: HVAC
Satisfied Customers: 3217
Experience:  UA Journeyman Pipefitter , HVAC, Refrigeration, DDC controls. 26 years.Commercial & residential
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My Honeywell/36 Programmable Thermostat displays EEE and

Resolved Question:

My Honeywell/36 Programmable Thermostat displays "EEE" and will not work. I have changed the batteries but that did not help.....
Submitted: 8 years ago.
Category: HVAC
Expert:  Mark Henley replied 8 years ago.



Generally speaking an E error means it's lost its E-prom which contains the firmware in the controller. I can't find any info that states otherwise so its probably a bad stat. You can try different batteries but it sounds like the stat has failed.





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