Do I need to Winterize a Garage Mini-Split?

No, if plumbed correctly your drain is empty and running in heat mode will dry the coil off, it most likely already is dry. Somehow mini split heat pumps work well down to even below 20 where old school heat pumps give up performance in mid 30's. Let 'er rip.

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Somehow mini split heat pumps work well down to even below 20 where old school heat pumps give up performance in mid 30's. Let 'er rip.

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Some mini-splits do. We have Samsung units at the other house rated well below zero but they go into defrost mode pretty frequently if it gets even a little below freezing. Told my fiancée to keep space heaters out and ready in the two rooms that system runs in as it's supposed to get below freezing tonight and stay below freezing until late Monday.

As far as winterizing, nothing needs to be done but now is the time to make sure all the condensation drain lines are really clean for next season. Any residue left to dry out now will become clogs later.

So glad I have natural gas furnaces...