Modine 3H0400780001 Limit Switch 320734-701 Because the heat exchanger is

Because the heat exchanger is the most critical safety component in a gas furnace

Automated Protection: The automatic reset function reduces downtime by restoring system operation once pressure stabilizes within the set differential

the 626407R is the current manufacturer-approved replacement for the 626407 and 6264070 part numbers

providing the reliability required in demanding mechanical rooms

the board may default to a fail-safe mode or fail to initiate a defrost cycle

Modine 3H0400780001 Limit Switch 320734-701 Because the heat exchanger isThe Modine 3H0400780001 High Limit Switch is a critical safety component designed for heavy duty HVACR applications where thermal protection is paramount. This L165 40F limit switch is engineered to monitor excessive heat buildup, featuring a precise 165 degree Fahrenheit trip point. As a veteran grade HVAC replacement part, it functions as a primary fail safe by interrupting the electrical circuit (typically 20 amps at 120 240 VAC) when the