Air and water temperatures significantly affect your ice machine’s production rate. As temperatures increase, your ice machine must work harder to create a batch of ice. The harder the unit works; the less ice it’ll make in a day. This isn’t so much an ice machine “problem” as a relationship between temperature the refrigeration system.
If your ice maker seems to be producing less ice than usual, check to see if the air temperature around your ice machine is reaching near 100 degrees. Ideally, you want the ambient air temperature of the room to be close to 70 degrees Fahrenheit.
If the room is running hot, try lowering the temperature on your thermostat. If you don’t have air conditioning in the room you installed your ice machine; you should seriously consider installing it in a room that does.
Since ice machines give off heat, low ventilation could also be an issue. Make sure there isn’t any clutter around your ice machine that could be trapping hot air around your unit. A good rule of thumb is to keep a foot and a half of space around your ice machine. That includes the ceiling.
Hot water entering your machine is harder to diagnose. You can run a meat thermometer under your tap for about 2 min to see if the municipal water supply is coming out hot. Water lines exposed to outdoor heat can cause this or if the line is running near a heat producing appliance like an oven or furnace.
Hot water migration is another problem that lead to less ice production. Appliances like dishwashers can pump hot water into the cold-water line and run directly into your ice machine. Hot water migration is a difficult problem to diagnose, so you will most likely require a technician or plumber to find the source of the hot water.