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If the switch is bypassed or stuck closed
simplifying inventory management and field repairs
Inspect the RS485 communication link and 24V power supply wiring to ensure stable signal transmission to the master IPU board
"set-and-forget" solution for balancing airflow across various duct configurations
Common Questions What causes this vent switch to trip in Modine unit heaters
Lochinvar & A.O. Smith 100111955 Gas Valve 320074-702 If the switch is bypassedThe Lochinvar & A. O. Smith 100111955 Gas Valve is a heavy duty, high performance 24V 3. 5" WC Nat 1" DBL Gas Valve engineered for large scale boilers and high recovery water heaters. As an OEM replacement gas valve, this component ensures precise fuel regulation and safe combustion within critical heating systems. This natural gas control valve is configured for a 1 inch NPT connection, making it vital for maintaining the manifold pressure of 3. 5
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