If leakage persists

While physically similar to other sensors

always verify your existing pilot orifice size and condition during installation to ensure the BTU input matches the manufacturer’s specifications

What causes a reversing valve to get stuck in one mode

Lennox 44W52 Collector Box 326058-756 If leakage persistsThe Lennox 44W52 Collector Box (also identified by part number 102107 01) is an essential OEM component for high efficiency gas furnaces. Located at the secondary heat exchanger outlet, this collector box is engineered to manage the disposal of acidic furnace condensate and combustion byproducts. By facilitating proper condensate drainage, the 44W52 protects the internal furnace heat exchanger from moisture induced corrosion and premature failure.