Question about Hoshizaki Freezer Commercial Ice Machines - KM900MRH Commercial Ice Machine

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Does a Hoshizaki Model F-1001MWH have a Defrost cycle? As far as I know the "defrost" is the harvest cycle correct?

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  • Hoshizaki Master
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Ice makers defrost is the harvest cycle. The purpose of a defrost cycle is to clear any ice build up, right?

Posted on Aug 11, 2010

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Posted on Jan 02, 2017

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My hoshizaki ice machine KM-900mrf model beeps 3 times and stop making ice. After reset it starts, but stats beeping again after an hour.


Have a look at the side of the evaporator; there is a probe (thermistor) attached to it that tells the control board when to initiate the harvest cycle. make sure it's clean and attached properly and doesn't need replacing. If hitting the float switch initiates the harvest cycle it sounds like you have a blocked/ scaled water tube or switch housing. take off the bottom of the switch assembly (black rubber bit) and clean through to the water chamber. run a cycle of descaler before trying again.

Jul 04, 2015 | Hoshizaki Freezer Commercial Ice Machines...

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Hoshizaki km-1900 ice sitll up no going down


if your are referring to a harvest cycle not clearing the plates, there may not be enough heat to clear the plates or the defrost cycle is too short. Usually the first thing to check. start there my friend.

Jun 05, 2014 | Hoshizaki Commercial Freezer KM-500MAH

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Ice machine keeps freezing on the ice trays


If you are referring to the ice not clearing the evaporator plates, usually the defrost cycle is too short. Check that by watching the machine and when it goes into the harvest mode, see if all the ice comes off. If not, lengthen the cycle.

May 15, 2014 | Hoshizaki Commercial Freezer KM-500MAH

1 Answer

What is hgv valve leaking by


The hot gas valve is activated during the machines harvest cycle letting hot gas defrost the evporator. If it is "leaking by " that means that it is not fully closing during the freeze cycle causing high suction pressures and inefficient operation of the machine. And maximum freeze cycles. If that is happening it will need to be replaced by a qualified technician.

May 09, 2014 | Hoshizaki Freezer Commercial Ice Machines...

1 Answer

I have a up right hoshizaki model fh1-AAC unit will not come out of defrost


These machines do not work like you think. The display will show the defrost mode even when in the freeze cycle. After a defrost cycle, the cooling system comes on but the display will not show any temperature numbers until the conditioned space gets to within 15 degrees of where you have it set to cool to. So, if it is set to 0, the box needs to hit 15 degrees before it shows numbers. You have a cooling problem. Several thing can cause this. may need a tech to check.

Sep 12, 2012 | Hoshizaki Freezers

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Ice stuck need longer harvest time


need model number to really help. generally, if you turn on the number 1 and 2 dip switches on the control board, it will give you the longest possible defrost.

Sep 22, 2010 | Hoshizaki Freezer Commercial Ice Machines...

1 Answer

2 beeps every hr.already cleaned, checked freon,dropes ice after resetting it


2 beeps every 3 seconds indicate that the unit has been in the harvest/defrost mode for 20m minutes. If you are absolutely sure that the freon level is correct, check for a water problem. I have seen many a problem corrected by ensuring that the incomming water flow was correct. If you have water filters, change them. In many cases, at the very end of the harvest cycle, the unit goes into the freeze cycle but it brings in ground temp water which actually "rinses" off any laging cubes. I've done this many time with great success. But the freon level has to be exactly correct before doing anything else. Especially in cold weather, it is major important.
Hope this helps.

Jan 22, 2010 | Hoshizaki Freezer Commercial Ice Machines...

2 Answers

Hoshizaki ice machine repair?


seems that its low on water or float switch is bad. try to clean float

Sep 02, 2008 | Hoshizaki Freezer Commercial Ice Machines...

1 Answer

Something wrong with Harvesting cycle, ICE will not come out, coils freeze up.


If you need answers and have not recieved results I will try to help, I see no one responded to your request because the manual and diagnostics info seems to only be sent to people that sell and purchase the machine. If you need help and want answers  you can call me at 864-812-1887 or e-mail me at seabreezehvac@yahoo.com  your description of the problems could be many different possibilities. I want to know and help also. Thanks John Tripp

Sep 03, 2007 | Hoshizaki Commercial Freezer KM-500MAH

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