Vaillant 053574 Gas Valve

Ecomax Pro 18 E VU 186-0 2003-2007
Ecomax Pro 28 E VU 286-0 2003-2007
Ecotec Plus 415 VU 156/2-OH 2006-2015
Ecotec Plus 418 VU 186/2-OH 2006-2015
Ecotec Plus 428 VU 286/2-OH 2006-2015
Ecotec Plus 438 2006-2016

The gas valve is a gas distribution mechanism. When the need for gas in the burner increases, a message is sent from the printed circuit board to the gas valve, which opens and allows gas to flow through the valve in to the pilot assembly or the burner dependant on the type of appliance.