Lochinvar & A.O. Smith 100108641 Thermostat 321894-708 the 26G78 is technically identical

the 26G78 is technically identical to the 26G7801 and serves as the current standard replacement part for Lennox and Allied Air equipment

but always verify individual valve nameplates before commissioning

making it suitable for commercial or heavy-duty residential power supplies

For service professionals maintaining Lochinvar or A

ensuring stable operation in high-static applications

Lochinvar & A.O. Smith 100108641 Thermostat 321894-708 the 26G78 is technically identicalThe Lochinvar & A. O. Smith 100108641 Thermostat is a critical OEM replacement part designed for precise thermal management in commercial and residential water heating systems. This WH9HC 6 lower thermostat features an integrated Energy Cut Off (ECO) safety switch, providing a redundant high limit safety layer that manually interrupts power to the heating elements if tank temperatures exceed safe operating parameters. The kit includes the protective