This official guide explains the E1 (Internal Sensor) and E2 (External Sensor) error codes on MAXKOSKO thermostats. Follow our step-by-step troubleshooting for wiring and resistance testing to resolve these issues quickly and safely.
This official guide explains the E1 (Internal Sensor) and E2 (External Sensor) error codes on MAXKOSKO thermostats. Follow our step-by-step troubleshooting for wiring and resistance testing to resolve these issues quickly and safely.