Common Questions: How do I change the defrost frequency on the CNT1642

Field-verified for heavy-duty residential and light commercial HVAC applications

Non-Removable Trippers: Captive 15-minute segments prevent lost hardware and simplify complicated scheduling

The baseline speeds are managed by 24 VAC inputs

Lochinvar & A.O. Smith 100166108 Pressure Switch 320720-756 Common Questions: How do IProfessionals in the field know that the Lochinvar & A. O. Smith 100166108 Pressure Switch is a critical safety component designed for precise draft proving in high efficiency condensing boilers and commercial water heaters. This OEM replacement part is engineered to monitor the negative pressure of the inducer motor, ensuring the venting system is clear of obstructions before allowing the ignition sequence to proceed. When a blocked flue or failed