and carbonized oil from the refrigerant stream

it ensures a leak-proof seal at the inspection plate

or 0-10VDC) and converts them into a linear pneumatic output with minimal hysteresis

What was the previous part number for this item

Whether you are troubleshooting a furnace not turning on or a dead contactor

Lennox 25W71 Gasket R-407A and carbonized oil from theThe Lennox 25W71 Gasket is a critical OEM replacement part designed specifically for sealing the collector box cover in high efficiency Lennox furnaces. As a veteran tech knows, a compromised seal at the secondary heat exchanger leads to pressure switch trips and dangerous flue gas leakage. This precision engineered furnace collector box gasket (also indexed under 100742 01) ensures an airtight, negative pressure environment required for the draft