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Re: Problems with Mastercool4000 R1234YF machine
Posted to HVAC Forum on 5/28/2025 2 Replies

My suggestion would be to access the compressor and turn it by hand, then see if it will start up. It's possibly not even broken in yet, got stuck from lack of use, and needs to run to free up.

Just a suggestion.

I do not have and have never used a 1234YF ... Login to read more.

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