Vaillant 0020110997 Gas section

The Vaillant 0020110997 is a gas valve for Vaillant gas-fired boilers. It regulates the supply of gas into the combustion side of the appliance: when the burner needs more gas, the PCB signals the valve, which opens and allows gas through to the burner or to the pilot assembly, depending on the appliance type. It is listed for ECOmax 613/2 E and ecoTEC PLUS models built between 2005 and 2010.

• The boiler fails to ignite and locks out on a gas valve or ignition fault
• No gas reaches the burner even though the PCB is calling for heat
• The pilot flame will not establish or will not stay lit
• The flame drops out or the boiler cycles erratically during a demand
• Repeated lockouts that clear on reset but return on the next demand

• Confirm your boiler model and GC number against the compatibility list, as this valve is used across several ECOmax and ecoTEC PLUS variants.
• Match the number on the valve being removed to 0020110997 before ordering.
• This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.