How to fix a manitowoc ice machine

Written by chyrene pendleton
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How to fix a manitowoc ice machine
Use a flashlight to look for dirt between the condenser fin blades. (flashlight image by Marek Kosmal from

Since its beginnings in 1964 in Manitowoc, Wisconsin, Manitowoc Ice has designed ice machines for the food service industry, which can produce up to 816kg. of ice daily, as of 2011. When problems arise with your Manitowoc ice machine, knowing how to fix it can you save time and money in service calls. However, Manitowoc will not cover any adjustments or fixes you make to your Manitowoc ice machine with its warranty, since all of its ice machines are adjusted at the factory before shipping.

Skill level:

Things you need

  • Phillips screwdriver
  • Soft brush or vacuum with a brush attachment
  • Flashlight
  • Can of compressed air

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  1. 1

    Locate the evaporator thermostat just above the bin thermostat behind your unit, if your ice machine does not produce ice during operation. Turn the evaporator thermostat setting one increment to the right. Allow your ice machine to run for three full cycles and look for a small dimple or groove in the centre of each ice cube. The dimple normally appears in the ice cube's centre as part of your ice machine's factory-set, ice-cube thickness formation.

  2. 2

    Relocate your ice machine to an area with an air temperature of at least 10 degrees Celsius, but not over 43.3 degrees C., if your ice machine produces white or partial ice cubes. The incomplete formation of ice cubes means a too high temperature exists around your ice machine. Do not place your ice machine in direct sunlight or next to equipment generating heat.

  3. 3

    Adjust the evaporator thermostat if the ice cubes will not release from your Manitowoc ice machine by turning the evaporator thermostat one increment to the left, which will decrease the ice-cube size. Your ice machine cannot release ice cubes that form in sizes too large. The ideal large ice-cube size weighs 32 grams and has the dimple in the top. Larger ice cubes will not have a dimple. Let your ice machine operate in three full cycles before expecting to see ideal ice cubes.

  4. 4

    Disconnect your Manitowoc ice machine from the socket, use a Phillips screwdriver to remove the two screws on the front grill, and then remove the grill, if your ice machine has a long freeze cycle resulting in a low production of ice cubes. Use a vacuum with a brush attachment or a soft brush to clean the condenser exterior from top to bottom. Look for dirt between the condenser fin blades by shining a flashlight through the condenser. Clean the fan blades by utilising a can of compressed air. Do not cut yourself on the sharp fin blades or bend any of the blades -- use the supplied fin comb to straighten out any bent condenser fins. Replace the front grill, tighten the Phillips screws, and then reconnect your ice machine.

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