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Michelle NguyenJul 30, 2025
What to do if my ClimateMaster ATA11U03 shows 'E4'?
- MMichelle DonaldsonJul 30, 2025
If your ClimateMaster Thermostat displays 'E4', it indicates a memory failure. In this case, the thermostat needs to be replaced.
What to do if my ClimateMaster ATA11U03 shows 'E4'?
If your ClimateMaster Thermostat displays 'E4', it indicates a memory failure. In this case, the thermostat needs to be replaced.
Why does my ClimateMaster ATA11U03 display '--'?
If the room temperature sensor fails on your ClimateMaster Thermostat, the temperature display will show '--'.
Power Source | 24 VAC |
---|---|
Programmability | Yes |
Application | Heat Pump Systems |
Display | Digital |
Control Type | Digital |
Programmable | Yes |
System Mode | Heat/Cool/Auto/Emergency Heat/Off |
Backup Heat Control | Yes |