and carbonized oil from the refrigerant stream

Plug-and-Play Integration: Standardized connector pins ensure rapid field substitution during service calls

Whether you are performing an HVAC system diagnostic or a complete air handler repair

Industrial Build Quality: High-grade copper windings and durable insulation materials withstand the high ambient temperatures found in mechanical rooms

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