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Originally Posted by Robnlaura
Good info to have I use the Intermatic on each mini split probably overkill but very easy to install.. on a outside ac unit just as easy to install..
Intermatic AG3000 120/240 VAC Universal HVAC Surge Protective Device - Comprehensive Surge Protection, TPMOV Technology, Watertight Enclosure - UL Listed and Reliable https://a.co/d/5KecR0x
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This is a little better unit that provides some other protection like for brownouts, short cycle, etc. A little more expensive but worth it.
Intermatic CD1-024R Compressor Defender Protects Central Air Conditioner / Heat Pump Compressors and Circuit Boards