Sime water heater shows E09; unit will not ignite and may indicate gas-related fault.
Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
Possible Causes
How to Fix / Troubleshooting
Critical safety: If you smell gas, do not attempt repairs. Ventilate the area, do not use electrical switches, and call emergency gas services.
Steps (if no gas smell):
- Check gas supply: Confirm the gas isolation valve to the Sime heater is open. Verify gas supply by checking another gas appliance.
- Inspect gas valve wiring: With power off, check the connectors on the gas valve. Ensure they are tight and not burnt.
- Reset and test: Restore power and reset the heater. Open a hot tap and listen for the gas valve click and ignition sequence.
Professional help: Diagnosis of gas valve coils, gas pressures, and control board outputs must be done by a licensed gas technician. Do not attempt to open or adjust the gas valve yourself.
Repair Difficulty
Required Part
We may earn a commission from links on this page.