Field Controls 1170004 Switch R-134A typically at the 10 or

typically at the 10 or 2 o'clock position

Integrated valve position indicator for accurate status monitoring

It is ready for installation into compatible 3/4 HP units without the need for additional external software tools in the field

Bypassing a safety limit switch is never recommended for permanent operation

Field Controls 1170004 Switch R-134A typically at the 10 orThe 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