What is the difference between V8043F1036 and V8043F1036/U

this switch is designed for standard Lennox furnace platforms

or a clogged pilot orifice

While it can be used in R22 systems

making it a standard field replacement

Modine 3H0369740001 Conversion Kit 322838-754 What is the difference betweenThe Modine 3H0369740001 Conversion Kit is a critical OEM component designed for the field conversion of specific Modine gas fired unit heaters from propane (LP) to natural gas. As a veteran grade LP to natural gas conversion kit, this package includes the high precision natural gas orifices and gas valve conversion springs necessary to recalibrate the fuel to air ratio for efficient combustion. This Modine replacement part is engineered for Modine Hot