You can test this with a multimeter in series

What are the symptoms of this part failing

Precision Timing: The fixed 10-second TFI provides a sufficient window for consistent combustion without excessive gas accumulation

this replacement regulator spring allows technicians to convert or maintain 496 series units for higher pressure applications beyond standard inches of water column settings

Danfoss 193B-1701 Thermo Valve 30067439-890 You can test this withThe Danfoss 193B 1701 (also identified as 193B1701) is a heavyweight VTC511 thermic valve engineered for hydronic heating applications, specifically for solid fuel boiler protection. This 1 1 4" NPT thermal loading valve features a high 16. 2 Cv flow coefficient, designed to maintain a consistent return water temperature. By ensuring the boiler reaches and stays above a specific thermal threshold, it effectively prevents condensation and flue gas