Can I use the 48166902K to replace the 48166901 model

and (4) replacement screws for a full hardware refresh

Safety Compliance: Maintains the secondary safety loop required to prevent gas valve operation without active combustion

How do I confirm if my 24V coil is functioning

The Class F coil is housed in a NEMA 4X enclosure

Lochinvar & A.O. Smith 100110744 Switch 326070-701 Can I use the 48166902KThe Lochinvar & A. O. Smith 100110744 Switch is a critical OEM replacement component designed for integrated power control within high efficiency residential and commercial water heating systems. This water heater power switch resides on the main control panel, providing a direct interface for technicians to verify circuit continuity and manage system states during troubleshooting or routine maintenance. Engineered as a genuine A. O. Smith replacement