20 Most Recent Manitowoc SY0454A S Series Ice Maker Energy Star Half Cube 380 lb 24 hr Air Cooled Questions & Answers


Very unusual for one of these to not stop. There is a magnetic proximity switch located on the bottom right side of the water curtain that serves to both cancel a harvest/drop and to shut the unit down on a full bin. When a drop occurs the control board sees a open and then close of the switch and restarts a freeze mode. If the ice drops and the bin is full the curtain is blocked by the ice behind it from closing again and the unit shuts down on a full bin indication. If the curtain does not open and close after 3 hours it would lock the unit out. Therefore I assume that the switch and the board are working. Most likely you either have the unit on a non-Manitowoc bin or are missing a deflector plate in the Manitowoc bin and the ice is falling out of a service door.

Manitowoc... | Answered on Jan 21, 2020


Replacing Manitowoc water level probe and Ice Thickness

Manitowoc... | Answered on May 07, 2017


Ice bin thermostat is bad.

Manitowoc... | Answered on Aug 22, 2015


Run wash cycle, take it a part and clean all distribution rail! Hope That Helps!

Manitowoc... | Answered on Aug 22, 2015


After ice is produced (usually about 12-15 minutes) harvest is initiated and the ice should drop off of the plate and the curtain opens and closes in 90 seconds or so. If it takes three minutes and the curtain doesn't open and close the unit will go back into freeze. It will do this three times and then lock out.

First - does the unit make ice and start harvest in 12-15 minutes? Second - Is the ice thick enough? it should be one continuous slab with about 1/4" bridge across the front of the slab. IF both of these answers are yes then the plate is either bad or it needs cleaning. You need nickel safe ice machine cleaner and probably an experienced technician to determine if the plate is worth cleaning or is worn out.

Manitowoc... | Answered on Mar 30, 2014


It can be a variety of problems. The door bin switch should turn off the unit when it senses that the door is open (bin full of ice). It is a curtain that opens out to release the ice.
Next it could be the water inlet solenoid, it energizes to allow water in for the ice making process. If it stays constantly on then that would be your problem.
Look at the control board light indicators and you'll know what cycle it is on. These parts are energized and seek help if needed.

Manitowoc... | Answered on Dec 22, 2013


If it doesn't run at all open the front panel and peer inside of the control box. See if there are any indicator lights on the control board lit or blinking. Check the plastic water curtain on the machine and make sure that the magnet is in place on the bottom right. Will need more information as to what lights are lit. Printed on the board next to each light is its corresponding function or response.

Manitowoc... | Answered on Apr 13, 2011


is it plugged into a new or older outlet,and is it plugged in by itself,with no other appliances effecting its power

Manitowoc... | Answered on Aug 15, 2019


First, this us a very old system and probably needs to be replaced if it really is an R12 system. The unit is probably at least 40 years or more old since they stopped producing R12 about 1970's. If your manitowac ice machine is usable still, it probably has lost its charge and will need to be refilled with a suitable refrigerant. I actually still have a jug of R12, but I generally charge systems with the only substitute still available R420 if you can find someone who still sells it. I saw that both refrigerant were being phased out and purchased a couple of jugs and only have a little left. My suggestion if you want this ice machine in operation again take it to an ice machine repairman and have him repair it. Good luck.

Manitowoc... | Answered on May 29, 2019


High Pressure warning.

Usually overheating of compressor.
Check that ventilation is not blocked.

Manitowoc... | Answered on Mar 25, 2019

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