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.
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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.