using this specific P321826 vent switch ensures exact physical fitment and proper operation of the safety loop without the risk of nuisance tripping or delayed response times associated with generic universal alternatives

Is this pilot assembly compatible with propane (LP) gas

Contractors can rely on this factory-spec harness for rapid plug-and-play installation during field repairs

Optimized Combustion: Designed to maintain a crisp blue flame

Whether you are retrofitting a commercial split system or commissioning a new zoning equipment controller project

Field Controls 1170004 Switch 340155-7024 using this specific P321826 ventThe Field Controls 1170004 (FTS 4) is a critical manual reset thermal safety switch designed to protect gas fired furnaces, boilers, and water heaters from hazardous flue gas spillage. This SPST thermal switch monitors temperatures at the draft hood or barometric control, effectively de energizing the burner circuit if hot gases escape due to a blocked flue or inadequate chimney draft. Engineered for heavy duty applications, it features a 140F fixed