This is a BRAND NEW Climatek Drop in replacement ECM Motor & Module Combo Kit. This 16-pin variable speed motor connects the same as the OEM and is universally compatible with all 2.0 & 2.3 motors. It does not replace any 2.5 ECM motors or ECM motors that have a silver motor module (3.0 ECM). It replaces the old part numbers listed below. For a suitable replacement! An electric motor converts electrical energy into mechanical energy. In an HVAC system, motors typically turn the air conditioning fan blade and the furnace blower motor. Newer high efficient motors, such as X13 and ECM motors, have “end caps” that control the motor speeds. These can be removed and replaced separately. Replaces Old Part #s.