Lennox 24W49 Pressure Switch R-407C check for continuity across the

check for continuity across the element

or failure to initiate the igniter despite a closed pressure switch

The Carrier HT01BD202 Transformer is a heavy-duty OEM replacement part designed for reliable step-down voltage conversion in commercial and residential HVACR systems

Versatile Application: Suitable for both mixing and diverting in 3-way zone valve setups for hot or chilled water systems

If the plunger cannot seat fully

Lennox 24W49 Pressure Switch R-407C check for continuity across theThe Lennox 24W49 Pressure Switch is a critical safety component designed for specific Lennox furnace models to monitor the induced draft blower operation. This OEM Lennox replacement part, identified by part number 101021 04, is factory calibrated with a set point of 0. 70" WC PF 1. 05" WC. It ensures the combustion process is vented correctly before allowing the gas valve to energize. Built with a durable diaphragm and precise electrical contacts,