ActronAir Reversing Valve Coil suits MRC Series activates the reversing valve solenoid to switch between cooling and heating on MRC series residential split ducted systems. The MRC13526AC coil is specific to the MRC series reversing valve body -- confirm compatibility against the system service documentation before ordering, as reversing valve coil connections and voltage ratings vary across the residential split ducted range. Isolate power and recover all refrigerant before replacing any refrigerant circuit components.