Heater Error: What Does it Mean if my Thermostat Reads “Heater Error” on the Display?
3iE Energy-Monitoring Thermostat
Heater Error Reading on your Thermostat?
The heater error message means the heating system not properly wired to the thermostat. As a result, you need to reassess the connection between the heating system installed and your thermostat. Then, test the thermostat again.
Contact your electrician to check for correct wiring of the system. Make sure to follow guidelines from the installation manual.
View the image below to see how the thermostat is built and installed to the back box. It is important to ensure the wiring is correct so that the heating system is able to receive instructions from the thermostat.
If the problem persists, please contact Warmup at +1 (888) 927-6333.