Service/fault: If the “Service/fault” symbol appears on the display Ph 1800 633 920. Continuous illumination of the symbol indicates that the fault is not preventing appliance operation. A flashing “Service/fault” symbol indicates that water is not being heated and it is essential you notify your qualified contractor. Switching the appliance to emergency mode is a special case. The electric emergency/booster heater will then heat the water despite the flashing “Service/fault” symbol.
Normal and Fault Display Codes.
Service/fault: If the “Service/fault” symbol appears on the display Ph 1800 633 920. Continuous illumination of the symbol indicates that the fault is not preventing appliance operation. A flashing “Service/fault” symbol indicates that water is not being heated and it is essential you notify your qualified contractor. Switching the appliance to emergency mode is a special case. The electric emergency/booster heater will then heat the water despite the flashing “Service/fault” symbol.
Normal and Fault Display Codes.
Stiebel heat pump error codes indicate specific faults or operating issues detected by the system, such as sensor errors, pressure faults, temperature issues, or electrical problems. These codes help identify what’s affecting your hot water system.
Some minor issues may be resolved by resetting the unit or checking power supply and ventilation. However, most error codes require professional diagnosis to prevent further damage or safety risks.
You can usually reset the error by switching the unit off at the power supply for a few minutes and restarting it. If the error code reappears, it indicates an ongoing fault that needs professional attention.
Repeated error codes usually point to an unresolved underlying issue such as faulty sensors, compressor problems, airflow restrictions, or electrical faults. Continued resets without repair may worsen the problem.
Some warning codes allow limited operation, but critical error codes can shut the system down completely. Running the unit with active faults can cause further damage, so it’s best to have it inspected promptly.
You should contact a licensed hot water technician experienced with Stiebel heat pumps. Anytime Hot Water provides expert diagnosis, fast repairs, and servicing across Sydney.
