E09
Roca
Gas Valve Control Fault
Furnace indicates gas valve or gas supply fault, no ignition despite fan and spark operating
Advertisements
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.
Advertisements
Possible Causes
Defective Roca gas valve coil, No 230V/120V or control signal to gas valve, Stuck gas valve, Closed manual gas shutoff
How to Fix / Troubleshooting
Safety first: Turn off power and close the gas shutoff valve. Gas work must comply with local regulations.
- Verify manual gas valve: Confirm the external gas cock is fully open and that other gas appliances work.
- Check electrical connector: Inspect the plug on the gas valve for loose pins or heat damage. Reseat firmly.
- Observe ignition sequence: With power and gas restored, call for heat and watch the sequence: fan, spark, then gas. If there is never any gas sound or flame, the valve may not be opening.
- Professional testing: Measuring voltage at the gas valve and checking gas pressures must be done by a certified technician. If E09 persists, the gas valve assembly should be replaced with the correct Roca part.
Warning: Never attempt to disassemble or manually force a gas valve. Incorrect handling can cause leaks and explosions.
Advertisements
Repair Difficulty
Professional Required
5/5
Required Part
Gas Valve Assembly
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements