or moisture/condensation behind the glass often indicate that the 100163214 seal has degraded and requires immediate replacement

providing a leak-proof interface that prevents system fluid from contacting the sensing bulb while maintaining maximum thermal conductivity

Dual-Pen Support: Versatile design functions effectively in both single and dual-pen recorder setups for comprehensive data acquisition

Whether you are servicing a residential condenser or a demanding industrial air handler

Lennox 76W34 Limit 320819-301 or moisture/condensation behind the glassThe Lennox 76W34 Limit Switch is a high precision furnace high limit safety control engineered for Lennox HVAC systems. As a critical genuine OEM replacement part (also identified as Lennox 102610 01), this component features a factory set 200F limit to protect the heat exchanger from thermal stress. When supply air temperatures exceed the safe threshold, the open on rise mechanism interrupts the burner circuit, preventing system damage and ensuring