Vail 0020073800 Fan Assy Vu-vuw A thermocouple is a device that is made of two different metals that produce a charge when heated on one side. This small charge activates an electromagnet which opens a valve and stops restricting the flow of gas or water .

Brand Name	Vaillant
Colour	None
Material	None
Manufacturer Model No	0020073800
Wear Type	None
Type	Fan Assembly
Certifications Met	None
Country of Origin	None
Protects From	None
Waterproof	None
Number of Pockets	None
Fits Multiple appliances	Yes
Supplier Part Number	0020073800
Waist Size	ac64ce11gv
Toilet Cistern Capacity	FTW