Error code
HH
Issue
The ambient temperature exceeds the reading range.
Verification
Make sure that the operating temperature of the thermostat is between 0 °C and 50 °C (32 °F and 122 °F).
Solution
Perform a reset of the circuit breaker.
- Find the circuit breaker connected to the unit.
- Disable it.
- Wait about 30 seconds.
- Reactivate the circuit breaker
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