How Do Manitowoc Ice Makers Know When To Stop?

Manitowoc Ice is known for making the best quality ice machines. You can find their commercial ice makers and dispensers in hotels, restaurants and other establishments all over the country. But whether you use your Manitowoc Ice Maker at home, or you’ve used one to make an icy beverage at a hotel or restaurant, you may have wondered just how exactly an ice maker knows when to stop making ice.

Well, most ice makers have sensors that let them know when to stop making ice or to shut off altogether. These sensors can tell how much ice is in the machine’s bucket and how much it weighs, and will automatically stop ice from being made.

But it may surprise you to learn that an ice maker’s job isn’t just about freezing water and then dispensing it into ice cubes. Below, we’ll take a look at how a Manitowoc ice machine works, as well as answer some frequently asked ice maker questions.

The Ice-Making Operation Sequence of A Manitowoc Ice Maker

Below, we’ll be discussing the ice-making sequence for the Manitowoc S-Series, Indigo, and NEO models.

  • Water Purge Cycle: This is what ensures the machine is only using fresh water to make your ice, and not water from previous uses. Once this cycle has cleared the water trough, the machine can move onto the next cycle.
  • Freeze Cycle: After the water is purged, it flows through the evaporator. The machine’s refrigerator system makes the evaporator chilly, letting the ice build up until the water meets the thickness probe.
  • Harvest Cycle: Harvesting the ice means the remaining excess water goes down the drain while the evaporator is warmed by the gas. As the evaporator warms up, the ice cubes will slide into the storage bin. As long as the cubes clear the water curtain, the machine will then enter another freeze cycle.
  • Off/Full Bin Cycle: If the curtain is held open thanks to falling ice, the ice machine will automatically shut off. The ice will soon melt or be removed, allowing the curtain to close. The machine will then start a new water purge cycle.

How Does A Manitowoc Ice Maker Know What To Do?

A Manitowoc Ice Maker has a control board that switches the machine from cycle to cycle, and this is based on the inner switches and controls. A Manitowoc control board features a few non-adjustable timers. These include:

A freeze cycle that is locked in for six minutes before the machine moves onto the harvest cycle. This cycle can be bypassed in S-Series models by adjusting the toggle switch from OFF to ICE.

Different Manitowoc models have different freeze times. For example, the freeze time on the S-Series and Indigo models is 60 minutes at most, while the NEO model has a freeze time of 45 minutes. As soon as the maximum freeze time ends, the harvest cycle automatically begins.

Troubleshooting A Manitowoc Ice Maker

Your ice machine not working is always an inconvenience. Thankfully, Manitowoc Ice Makers malfunctioning is rare, but if you make good use of your ice maker and use it every day, then it’s natural to run into some issues now and then.

Below, we’ll take a look at some common issues you might run into and how to troubleshoot them.
It’s worth noting that while this will help you identify some problems, a lot of these issues will need to be fixed by an authorized service technician.

Ice Machine Not Operating Properly

If there’s no power going into your ice machine, it is definitely worth checking if the machine is plugged in. Or your ice machine might not be working because a breaker has tripped, or a fuse has blown, so it’s worth checking your box.

The toggle switch might also be off. If the ON/OFF/WASH switch isn’t properly set, or it’s stuck, then your ice machine won’t operate properly. On the other hand, the water curtain could be open. If this is the case, the machine won’t turn on until any ice or other obstructions are cleared.

The Machine Isn’t Releasing Ice Or The Harvest Has Slowed Down

This problem may occur when the machine is dirty. This prevents the ice from releasing and slows down the harvest cycle. Make sure you clean the machine according to the instructions in your owner’s manual.

You may also experience this problem when the machine isn’t level. For optimal performance, your ice machine needs to be sitting flat. It could also be because the ambient temperature is too warm.

On models that are air-cooled, the air temperature needs to be a minimum of 40 degrees Fahrenheit (4 degrees Celsius). Or it could be down to a leaking water regulating valve. This could be a problem on water-cooled models if it’s leaking in harvest mode. If this is the case, the valve will need to be replaced.

The Machine Isn’t Making Enough Ice, Or Is Making No Ice At All

Firstly, check if the water supply is connected and the water service valve is open. You should also check if the filter screen of the water float valve is clean. This can cause the machine to make not enough ice.

You should also check if the condenser is clean and nothing is in its way. Or it may be down to the air temperature being too high. In an air-cooled model, the air temperature must be no more than 100 degrees Fahrenheit or 43 degrees Celsius.

Frequently Asked Questions

Do Older Ice Makers Turn Off By Themselves?

Usually, older ice makers will have a lever or arm that you can pull up or down to start and stop the ice making. But if you have an ice maker that is only a few years old, or you have a relatively modern fridge, then it should have a system that automatically detects overflow. You can check this by looking for a pull-down lever on the inside of your ice maker or visiting the manufacturer’s website.

How Much Ice Can An Ice Maker Hold?

Usually an ice maker will hold between 4 and 11 lbs of ice in its bucket/tray. Bigger, commercial ice makers can hold up to 30 lbs of ice. There is a noticeable difference between what a built-in ice maker in a refrigerator can hold compared to that of a freestanding ice maker.

Furthermore, a standard ice maker can produce around 3 to 7 lbs of ice within 24 hours or until it turns off automatically.

Is There A Reason My Ice Maker Is Making Too Much Ice?

There could be a few reasons why your ice maker is making too much ice. It could be because your ice bucket or tray isn’t directly beneath your ice maker, and so the sensors can’t detect when your machine is full. Or if you have a more traditional ice-maker, it may be because your ice maker’s arm or lever is broken and will need to be repaired or replaced.

If you have a modern ice-maker with sensors, try resetting the machine and contacting the manufacturer if the problem persists.

Can I Adjust My Ice Maker To Make Less Ice?

Most ice-makers don’t let you make specific changes to their settings, but you can often adjust their water-fill amounts. You can do this by locating the water adjustment screw on your ice maker and turning it clockwise.

Doing this will reduce the amount of water entering the machine, which will hopefully stop the machine from overflowing. However, make sure not to turn the water-fill screw too far, as this can damage your machine.