Thermor Appliance Repair in Davenport & Cale Green

What does error code W.9 mean on a Thermor heat pump water heater?

Error W.9 indicates the water temperature is excessively high, exceeding 80°C. This is a safety protection. Switch off the water heater and allow it to cool completely. Check if the supplemental electric heater is operating continuously. If the mechanical safety device has triggered, it may need to be reset by a qualified engineer.

What does error code W.30.3 mean on a Thermor heat pump water heater?

Error W.30.3 indicates a component is in auto-conduction, showing high intensity on the electrical line. This relates to internal electronics. Switch off the unit and contact a qualified engineer immediately. Do not attempt to repair electrical components yourself.

What does error code W.24 mean on a Thermor heat pump water heater?

Error W.24 (Info24) is an informational message indicating the air temperature is outside the ranges tolerated by the refrigerant fluid. Ensure the unit has adequate ventilation and the air inlet is not obstructed. In extreme temperatures, the electric backup heater will activate automatically.

What does error code W.11 mean on a Thermor heat pump water heater?

Error W.11 means the thermodynamic water heater has not received the off-peak hours impulse from your electricity meter. Check that your off-peak hours contactor is functioning correctly and verify the wiring between your meter and the water heater.

What does error code 10 mean on a Thermor electric water heater?

Error 10 indicates the safety thermostat has triggered due to excessive temperature buildup. This is a safety feature preventing overheating. Cut power for 1 minute, then restart. If the error recurs, this indicates a problem requiring professional diagnosis.

Why does my Thermor heat pump water heater make noise?

Heat pump water heaters produce operational noise from the integrated heat pump compressor and ventilation fan during heating cycles. This is normal operation. Thermor recommends installing these units in non-habitable spaces such as a utility room, garage, or cellar rather than near living areas or bedrooms.

What is the pilot wire on Thermor electric radiators?

The pilot wire (fil pilote) allows centralised control of multiple radiators from a single programmer or energy manager. It transmits operating commands including Comfort, Eco, Frost Protection, and Off modes. All radiators with pilot wire capability follow the same protocol, enabling whole-home heating management from one controller.

How do I clean the evaporator on my Thermor heat pump water heater?

The evaporator should be cleaned annually. Use compressed air to blow debris from the fins, a vacuum cleaner with a soft brush attachment, or a dedicated evaporator cleaning spray. Take care as the aluminium fins are sharp. Always disconnect electrical power before performing any maintenance.

What is the difference between inertia radiator heating body materials?

Aluminium heating bodies are highly reactive, ideal for irregular schedules with variable occupancy times. Cast iron bodies offer both inertia and reactivity, suitable for mixed routines. Heat transfer fluid bodies provide steady, sustained warmth best suited for regular schedules with consistent presence times.

What temperature should I set my Thermor heat pump water heater to?

The recommended setting range for nominal water temperature is 50-55°C. The heat pump operates efficiently within an ambient air temperature range of -15°C to 37°C.