Dometic DN1070 icemaker leak - Printable Version

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+--- Thread: Dometic DN1070 icemaker leak (/showthread.php?tid=8776)

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Dometic DN1070 icemaker leak - dannymarilyn - 12-06-2025

Had another water leak from our Dometic DN 1070 undercounter icemaker.  The leak was in the bend in the plastic line where it goes through the sheetmetal under the cooling fan. The thin plastic water line was leaking at the sheetmetal hole. Poor engineering, poor selection of materials.

The hardware guy recommended a house standard stainless braided 1/4" rubber lined ice maker line.
The part number was a 121M72 for the 72" line that I bought.  The problem is the new connections will not go through the old line holes.

I ordered a Harfington sheet metal hole punch 28.3 mm from Amazon for about $21, and removed the fan from the cabinet.  Five screws out will free the whole fan, unplug the wires and remove the fan and housing.  Remove the old plastic insulator and insert the hole punch bolt, thread the end of the punch on the bolt and tighten.  A racheting 18 mm wrench fits nicely into the cavity to tighten the punch until the hole is enlarged.  Three 3/4" grommets with the outside grooves filled with silicone were installed in the three newly enlarged holes.  There is a hole in the back cabinet metal, the one under the fan and the one in the front where the line goes to the water valve.  The 18mm wrench will fit in all three spots.

Rubber gloves are good when slipping the siliconed grommets into the enlarged sheetmetal holes.  In addition, I bought a piece of clear plastic tubing just big enough to allow the braided hose connections to slide through.  The size for me just barely fit through the rubber grommets.  That should stop water line chafing permanently. (The end of the waterline is just wrapped into the unit so it is not on the floor.)

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