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This bi-directional filter drier design ensures that dirt trapped during the cooling cycle is not flushed back into the system when the unit switches to heating mode
Inconsistent voltage at the reversing valve is another common indicator
A steady flash or specific sequence of pulses corresponds to fixed diagnostic tables (e
checking the model and serial number of the HVAC unit is the most reliable way to confirm fitment
eliminating "hunting" and ensuring the MP920B actuator reaches the exact commanded stroke
Lennox 56L56 Orifice R-407C This bi-directional filter drier designThe Lennox 56L56 LP Orifice is a high precision tapered orifice engineered for liquid propane (LP) conversion and gas flow regulation in residential heating systems. Also designated under the part number 56L5601, this authentic OEM Lennox replacement part is critical for technicians performing a natural gas to LP conversion on compatible furnace and unit heater models. It ensures the correct stoichiometric ratio by meting fuel into the burner assembly