Lochinvar & A.O. Smith 100166064 Pressure Switch 318172-701 Do I need to replace

Do I need to replace the defrost thermistor when installing this board

5:1 to 15:1 ( Factory set at Approximately 5:1 )

This single-piece solid Hytrel insert is specifically designed for size 6 Sure-Flex Plus couplers

the P251-0051 serves as a durable HVAC motor accessory that replaces legacy part numbers including 09DC507163 and HC99AA500

Lochinvar & A.O. Smith 100166064 Pressure Switch 318172-701 Do I need to replaceThe 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