3iE Energy-Monitoring Thermostat

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What does it mean if my thermostat reads “output fault detected” on the display?

This can mean many things. The best thing to do would be to follow the instructions on the unit and call the Warmup technical department. 888-927-6333


It is likely to be a wiring or installation issue. Please consult our installation manual for futher assistance. Troubleshooting steps will need to be done with a licensed electrician. Please have the electrician call us on site with the model numbers that were installed and a multimeter for testing.