It is a thermally operated switch installed in the electrical power line to the burner

Other Balcrank Premium Series Replacement Hoses also available in our store:

Inlet 9/16 – 18(M)

The MVA7205 quickly connects to Mityvac models MV7400

P/N 100200

Zeeline 171-NF01 - Milton® 2-In-1 High Volume Hydro And Air Power Cleaning Wand SIDE BAR CONNECTOR It is a thermally operatedMilton 2 In 1 High Volume Hydro And Air Power Cleaning Wand Features: This equipment and engine air or water cleaner is great for any industry: agriculture, construction, automotive, industrial, stationary power and others that requires a powerful, multi port nozzles to clean Radiator, Condenser, Machine Shop, Machinery, Agriculture and Heavy duty vehicles FOR PRECISE CLEANING: Constructed of robust 15 1 2" industrial grade aluminum tube, this air