Lochinvar & A.O. Smith 100166064 Pressure Switch 321702-401 while the 3-foot capillary offers

while the 3-foot capillary offers the necessary reach for flexible positioning within the cabinet

allowing the brass valve body to remain in the piping system for faster service

Fail-Safe Design: Integrated dual internal safety switches prevent ignition unless the damper has reached the full 90-degree open position

Temperature Element

Key Benefits: OEM Compatibility: Exact replacement for Trane ELM1042 (superseded by ELM01042/X09130063010) ensuring precise fit in CHHB compressors

Lochinvar & A.O. Smith 100166064 Pressure Switch 321702-401 while the 3-foot capillary offersThe Lochinvar & A. O. Smith 100166064 Pressure Switch is a critical safety component engineered for precise airflow monitoring in high efficiency water heaters and condensing boilers. Designed to prove the inducer motor draft before the ignition sequence begins, this genuine OEM pressure switch prevents the burner from firing if unsafe venting conditions, such as flue blockages or intake restrictions, are detected. This mechanical to electrical