or a failing blower motor that isn't moving enough CFM across the heat exchanger

The York S1-026-23232-712 Blower Wheel is a high-performance

As a field-tested professional

but it requires an approved vent protector (such as the Maxitrol 13A25) to prevent moisture and debris from entering the vent port

65" WC setpoint for accurate draft detection

Modine 3H0372760001 Conversion Kit Refrigerant or a failing blower motorThe Modine 3H0372760001 is a specialized LP to NAT Gas conversion kit designed for high efficiency thermal management in select Modine heating units. As the direct engineering replacement for legacy part number 3H37276 1 (also referenced as 53214), this kit is essential for contractors transitioning equipment from liquid propane to natural gas. The kit is specifically configured for compatibility with unit heater series including Modine HD75, HDS45,