Honeywell Gas Valve VK4105G1179U

The Honeywell VK4105G1179U is a gas control valve from Honeywell's VK4105 range, used to regulate and shut off the gas supply to the burner inside a gas appliance. It sits in the gas train and opens or closes on demand from the appliance's control board, so the burner only receives gas when the sequence of operation allows it. This valve is listed for Honeywell residential products.

• The appliance fails to fire even though the ignition sequence runs and the fan and pump operate normally.
• The burner lights and then drops out shortly after, with repeated lockouts on the control board.
• No gas is passed to the burner when the valve is energised, or gas continues to pass when it should be closed.
• The valve body shows signs of leakage, corrosion or a burnt smell around the coil.
• Fault codes on the appliance point to a gas valve or gas train fault rather than an ignition or flame-detection problem.

• Confirm the appliance make and model against the compatibility list, and check the existing valve's part number before ordering.
• Note the previous number VK4105G1179, which may be marked on older valves still in service.
• Check whether a gasket or seal kit is needed for the gas train joint, as these are often replaced at the same time.
• This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.