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My Manitowoc Ice machine will not produce ice. The harvest light is on and it will run through the clean cycle

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phillip easterday

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Hi, contact your local appliance repair facility, you may have problems with the control board, the ice level sensors or curtain.

Posted on Dec 20, 2017

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I HAVE A MANITOWOC QM30A ICE MACHINE. WILL THE LIQUID LINE THERMISTOR CAUSE IT TO RUN BUT NOT MAKE ICE?


Liquid line sensor on ice machines in general is used in conjunction with the control boards to determine defrost and harvest cycles. You could measure the line temp and chech the resistance of the sensor to check it.

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If you need further help, I’m available over the phone at https://www.6ya.com/expert/jerry_8a145f1328fa119f

Sep 07, 2016 | Manitowoc QM30A Self Contained 65Lb...

1 Answer

How can i fix my manitowoc qm45a runs water but won't freeze the water?


The thickness sensor is shorting, making the machine continually harvest. Clean it and dry it. If it still happens, replace the sensor.

Aug 05, 2014 | Manitowoc Compact Undercounter Ice Machine...

1 Answer

Ice machine locks out.


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.

Mar 04, 2014 | Manitowoc SY0454A S Series Ice Maker...

1 Answer

It will not stay in harvest cycle long enough to make ice before it goes into defrost


First it has to go through freeze cycle then harvest cycle to drop ice then back to freeze cycle. If you have never worked on ice machines before you should call a service company.

Aug 16, 2013 | Manitowoc QY-0214A Self Contained Ice...

1 Answer

Makes ice for 3 cycles then stops running.Can turn off then on again to make more ice for a couple more cycles.


check the cycle time for a batch of ice. should take around 15 minutes to freeze and then you will hear the harvest cycle kick in. If the harvest cycle takes 3 minutes or more that is your problem. You will need to get a hold of NICKEL SAFE ICE MACHINE CLEANER. DO NOT use CLR or any kind of cleaner other than NICKEL SAFE ICE MACHINE CLEANER. If the ice doesn't fall off of the plate in about 90 seconds either the plate is dirty or the nickel plating has come off. There is a failsafe shut down if the unit takes more than 60 minutes to freeze or more than 3 minutes to harvest 3 consecutive times. The cleaning instructions should be inside of one of the covers. If not it's available online.

Aug 15, 2013 | Manitowoc QY-0214A Self Contained Ice...

2 Answers

Ice maker Manitowoc QD-0212A


This light is a harvest limit light. This light's primary function is to be on as water contacts the ice thickness probe during the freeze cycle, and remain on throughout the entire harvest cycle. The light will flicker as water splashes on the probe. The lights secondary function is to continuously flash when the ice machine is shut off on a safety limit, and to indicate which safety limit shut off the ice machine. Start up of machine after turned off. !. Before the ice machine starts, The water pump and water dump solenoid are energized for 45 seconds to purge old water from the water trough. This ensures that the ice making cycle starts with fresh water. The water fill valve energizes after 45 second water purge, and remains on until the water level probe is satisfied. 2. to pre-chill the evaporator, there is no water for the first 30 seconds of the freeze cycle. 3. The water pump starts after 30 seconds pre-chill. An even flow of water is directed across the evaporator and into each cube cell.

Jul 13, 2013 | Kitchen Appliances - Others

1 Answer

My manitowoc series 420 has a code telling me the compressor discharge temperature


Which code is that? I don't see that in the service manual. There is an E09 that indicates that during the first six minutes of freeze the discharge temperature was below the average of the last 6 cycles. I have searched from E01 to E31 and don't see the code you indicate but I would say you either have a low refrigerant charge, a flooding TXV that is allowing too much refrigerant flow into the evaporator and not allowing enough flow to be diverted into harvest, or a weak compressor. Reset the unit and check the temperatures on the display while its running and time a freeze cycle. Should take about 15 minutes to make ice.

Jun 28, 2013 | Manitowoc ID-0452A 420 Lb Full Size Cube...

2 Answers

All cycles work except harvest manitowac ice machine


Ice thickness probe on Manitowoc and float switch may be dirty or stuck if hoshi. Manitowoc sometime the thickness probe can get dirty and a film of algae and not sense ice properly but rare

Oct 06, 2011 | Hoshizaki Freezer Commercial Ice Machines...

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