Every January we see the same call: a built-in ice maker that was working fine in October has slowed to a trickle or stopped entirely. Almost always, the cause is the same – the water supply line feeding it runs along an exterior wall, through an unheated crawlspace, or across a garage, and once outdoor temperatures drop into the teens, the line starts to freeze from the outside in.
How to tell it is a freeze, not a problem
A frozen supply line usually shows a specific pattern: ice production slows gradually over a few cold days rather than stopping all at once, and it often comes back partway once temperatures rise for a day or two. A genuinely failed inlet valve or control board, by contrast, tends to stop production abruptly and stay stopped regardless of the weather.
What we do about it
Thawing the line is the easy part. The part worth paying for is finding why that section of line got cold enough to freeze in the first place – a missing section of pipe insulation, a supply line routed too close to a rim joist, or a vent or outlet nearby letting outside air in behind the cabinetry. We trace the run, insulate or reroute the vulnerable section, and test it again before we leave, rather than just clearing the ice and hoping the next cold snap does not repeat it.
What you can check yourself first
If your ice maker slows down every winter, look for the supply line where it enters the house – usually near the water main or a hose bib. If you can feel a draft near it, that is very likely your cause. Wrapping accessible sections of an exposed line with foam pipe insulation before the first hard freeze is genuinely worth the twenty minutes.
If yours has already stopped, call us and we will get it running again and tell you honestly whether it is a one-time fix or a routing problem that will return every winter.
