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Old 23-01-2019, 16:30   #1
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Boat: Island Packet, Packet Cat 35
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Refrigeration help/advice

Hi all,

Ok, not sure this was the correct forum but here goes.

I have an old, probably 24 year old salt water cooled Grunert Refer system with 2 holding plates in 2 separate compartments. This unit is 120 vac.

Last year I had to replace the salt water pump. Ok, easy to fix.

Recently it stopped cooling. I checked it over and the sight glass is full of bubbles leading me to believe it was low on charge. Connecting the manifold gauges confirmed this. Ok, put in 2 cans of R-12. Each can is supposed to 1 lb. Pressure still low so not enough Freon. Worked for a while and now it's not working as well as even when I put gas in, like 3 days ago. Ok, need more gas and undoubtedly need to track down the leak that must be there. R-12 isn't easy or super affordable to come by in the U.S.

I have a 4k geneset on board so the 120 vac isn't an issue but given the age, one thermostat stopped working, now the leak(s) I am considering a new system.

My boxes are 6cf and 9.2 cf. Both can be made smaller, they are too deep anyway.

Questions. 1. Am I crazy for thinking of a new system when this one in theory should be easily repaired? 2. If I replaced the system, what system might I consider.

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Old 23-01-2019, 17:08   #2
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Join Date: Oct 2013
Location: Albany Ga.
Boat: Island Packet 38
Posts: 22,905
Re: Refrigeration help/advice

Id try having what I have fixed first, and maybe converting to 134a.
A decent fridge tech should be able to do it.
Replacing may be more expensive than you realize.
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