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

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Running but no ice

Machine keep running ,after 1 or 2mints go to harvest cycle, and making no ice at all and keep running .

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If you are getting 5 min freeze cycles the first place to look is the Check valve this is the white triangular housing right above your pump motor it has three stainless screws take this out there is a spring and a seat clean the seat off and then stretch the spring lightly not too much replace and see if this solves the problem.

Posted on Jun 23, 2009

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Either bad float switch or circuit board

Posted on May 28, 2009

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2 Answers

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...

2 Answers

I worked on a hoshizaki km-500mae when i turn it on the first cycle it makes good ice but after the first cycle it makes little pieces. why?


time the cycle. if it is only running about 5 minutes and going into harvest, look for sump loosing water. Look at where the unit drains (like a floor drain) while the unit is running to see how much, if any water is draining. does not take much to make an early harvest. also, sump may not be filling up completely but with just enough water to satisfy the float.

Feb 16, 2015 | Hoshizaki Freezer Commercial Ice Machines...

1 Answer

We have a hoshizaki ice machine 901mwh the ice cubs seems to be getting stuck in the evaporator area and pileing up on it self and freezing bake up


The main problem with Hoshizaki machines is if you are in a hard water area, if so do you have a good quality water filter, it may need changing. A quick way to check for calcium ot lime deposits in the machine is
1. Turn it off, run you clean hand around the area near the evaporator, are there any rough or flaky deposits there, if so you may need a chemical descale, contact a reputable fridge guy to do this for you.
2. The swinging arm motor may be faulty or possibly the ice sensor which controls the harvest cycle. If this is faulty sometimes the tray goes back up before the ice has slid off.
3. If the machine is situated in a cellar or other cool (less than 10 deg C / 50 deg f) this can sometimes affect the harvest cycle again to set this you need a tradesman.
4. Does the water flow properly over the lower part of the mould plate during a harvest cycle, the pipe can become blocked or dislodged.

Hope this is helpful

Apr 14, 2011 | Hoshizaki Freezer Commercial Ice Machines...

1 Answer

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


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

Jul 08, 2010 | Hoshizaki Freezer Commercial Ice Machines...

1 Answer

Hoshizaki KM-900MAH Ice Maker it sounds like it is making ice and is freezing it but its not dropping ice any solutions?


when the machine first starts, it begins it's cycle in the harvest mode. If the float switch is stuck, it stays in the fill/ harvest mode. Compressor runs and water circulates but no ice is being made. I'd start looking there. Turn the machine on, let it run for about 3 minutes, they very lightly tap the float switch. If it starts making ice, bingo, theres your problem. Let me know if I can be of any more help.

May 12, 2010 | Hoshizaki Freezer Commercial Ice Machines...

2 Answers

Ice Cubes won't drop out


The thickness probe should be approximatly 1/4 inch off of the evaporator.Sounds like you might have loose grids on the evaporator.turn the unit off and remove the curtain.use a flash light and inspect the grids.There should not be space in between the joints,if there is the ice will freeze behind the grids and not properly release when in harvest. Also gently pull at the grids,if they pull towards you or wiggle then they are separating. I have removed one of the grids and had the unit continue to run for sometime until the evaporator could be replaced.The plating being spotty causes release issues as well.Finally check the level of the machine,front to back and side to side.Not being level will also cause release problems

Feb 18, 2009 | Freezers

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...

2 Answers

Harvest cycle on ice machines


My ice machine Hoshizaki km-500 mah is cycling to fast. Causing poor production of ice it's real small and it doesn't produce enough ice aswell. Wha seems to be the problem.

Jun 20, 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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