If the solenoid is ignored during winterization, the latent water trapped inside it can freeze and crack its plastic housing. Just removing and draining or blowing out the in and out lines won’t clear the solenoid itself. The device needs to be cycled to open its valve so water can discharge. You can manually cycle it via the ice maker timer, but there’s a trick to that. Applying 12 volts to the solenoid’s + and - male connectors while applying air may be easier, and avoids having to remove the “pink stuff” antifreeze option from the ice maker or its filter later.
Joel