Ice-O-Matic Ice Machine Troubleshooting

/ Ice Machines, Troubleshooting / September 4

Ice-O-Matic Troubleshooting

When it comes to ice, Ice-O-Matic is one of the best brands in the foodservice industry. They manufacture a wide variety of durable machines used in many establishments around the world, ranging from restaurants and convenient stores to hotels and healthcare facilities. If a unit isn’t running up to speed, it can be a major problem. Luckily, we have a list of common Ice-O-Matic ice machine troubleshooting tips to help you out.

Click Issue Below to Read More:

Machine Doesn’t Run

Assuming the selector switch is set to “ICE,” look for the following issues.

  • Power supply problems – The machine might be switched off or unplugged. If neither is the problem, check if the power cord is damaged or if there is a field wiring deficiency. Faulty wiring should be repaired by an authorized service technician.

  • High pressure safety control tripped – If the safety control is tripped, you’ll need to reset it and see what’s causing high head pressure.

  • High temperature safety control open – When the high temperature control is open, have an authorized technician remedy the issue.

  • Bin control out of alignment – See if the bin control needs to be adjusted or defective. If it’s faulty, have it replaced by an authorized technician immediately.

  • Liquid line solenoid energized and open – Find the reason why the liquid line solenoid is unopened or inactive, have an authorized technician replace it.

Machine Not Making Ice

Here are some factors that could be preventing the machine from making ice.

  • Compressor not running – There are a couple of reasons that keep the unit’s compressor from running. A bad contactor or coil might need to replaced, or it could be a broken compressor or starter components. Have an authorized technician replace these parts or the entire compressor assembly.

  • Water leaking – Look for leaking out of the purge drain or water trough. Both could will prevent the production of ice.

  • Low suction pressure – Since this requires the handling of refrigerant, make sure it’s looked at and repaired by an authorized technician.

  • Dirty condenser – An unclean condenser can increase pressure head and effect air flow, lowering production of ice.

  • Leaking hot gas valve – If the hot gas valve leaks during freezing, you’ll need to have the valve replaced.

Machine Not Harvesting

The harvest cycle starts when ice is ejected from its ice mold. When the machine doesn’t enter this mode, look for the following:

  • Uneven freeze pattern on evaporator – An uneven freeze pattern can be linked to different factors. If the compressor is in good shape, the issue could be tied to an overcharged system or a thermostatic expansion valve (TXV) that is stuck open. If the compressor is worn out, have it replaced by an authorized technician.

  • Leaking in valves – There could be leaks in either the purge valve or hot gas valve. Stop the leakage by having an authorized technician replace either valve or removing any obstructions.

  • Timer issues – The timer initiate control might need to be readjusted or repaired by an authorized techncian. If the entire timer is defective, it would have to be replaced by an authorized technician.

  • Open high temperature safety control – If this control is open, the manual purge switch won’t energize the purge valve into operation.

Machine Harvests Too Long

If the harvest cycle is excessive, check for these issues:

  • Defective harvest assist assembly – If the harvest assist assembly is broken or not properly installed, readjust of have it replaced by an authorized technician.

  • Uneven ice formation on the evaporator – When the ice is uneven on the evaporator, there could be a refrigerant charge or leak. This MUST be handled by an authorized technician.

  • Defective hot gas valve – If the hot gas valve is broken or out of alignment, this could extend the harvest time. Have an authorized technician readjust or fix it immediately.

  • Dirty evaporator – The evaporator is crucial during the freezing and harvest cycles. If it’s dirty, clean it to improve performance.

Hollow Ice Cubes

If you notice hollow ice cubes, look for these root causes:

  • High water temperature – If the temperature exceeds 100°F, this will effect ice cubes during freezing and production. Correct the temperature in your facility.

  • Water leaking – Check for leakage from the purge drain. A broken drain or blockage could be causing a leak.

  • Timer issues – If the timer is set properly, see if the module needs to be readjusted or is broken. Also, check if the timer initiate control needs to be realigned or repaired by an authorized technician.

Looking for additional troubleshooting help? Check out our Ice-O-Matic ice machine manuals with specific instructions for your specific model.

Please contact a local authorized service agent who can help with this specific unit and all your commercial kitchen equipment needs.


  1. Chandra Khatri says:

    We have Model ICE 032DFAZ ice machine with dispenser at our hotel installed in 2002. It is not working .( Serial # A ZZZ-00519-Z )
    Can we just replace the ice maker and install it over the existing dispenser ? If we can which ice maker model will be adequate ?

  2. Parts Town Admin says:

    Typically the machine can be replaced without replacing the bin / dispenser. Some manufacturers will have stainless adapters if they no longer produce a machine to match the size of the bin. You’d have to double check with the manufacturer to see if this is an option for your model or not, but looking at the pictures of this model, it looks like the machine and bin are separate pieces.

  3. Michel Wall says:

    Our ice o matic makes lots of ice, but it is very noisy. It is like a very loud hum. What do we need to do?

    • A loud “humming” noise can be due to a few things. If the machine is new, it could just be vibration from normal operation. Self contained units have a compressor, condenser motor (usually), and a circulating pump. These components can accumulate a decent level of noise when running normally.

      If this noise has developed over time, it may be a maintenance issue. If the unit has not been cleaned and descaled, the circulating pump may be struggling to push the water through the system and running louder than normal. Try cleaning the machine with the manufacturer’s recommended cleaner / descaler and see if that helps. If it doesn’t, you might have a component that’s starting to fail and would need an authorized servicer to diagnose the issue.

  4. SCOTT GALYON says:


    • Is this while the unit is in ice mode or harvest mode? If the coil of the valve is getting correct voltage, it should be open. If it’s getting voltage during a freeze cycle, this usually indicates a failed control board. If during a harvest the coil is getting correct voltage but not opening, the valve body and coil need to be replaced. If the coil is getting only partial voltage during a harvest, you have a voltage drop across a component and will need to trace back the wires to locate it.

  5. Jack McCartney says:

    I have ICE-O-MATIC model ICEU060A it has been sitting in storage about 1 year ,When I hooked it up and plugged it in the the machine seems to be running fine but the water will not turn off it is running out the overflow and into the ice been

    • Try removing power to the machine and see if it keeps filling. If it does, you have a stuck-open water inlet valve. If it stops filling when power is removed, either the control board that energizes the valve has failed, or the water level sensor / float switch (if applicable) is dirty or has failed.

  6. crystal says:

    My undercounted ice-somatic makes ice, but the machine seems to be in overdrive and continues to try to make ice when the bin is full. Excess water is splashing on the ice and melting it, so then the machine wants to make more ice.

    • This usually indicates the magnet of the water curtain is stuck closed, or the control board is falsely reading that it’s closed. The water curtain magnet is what shuts the unit down when the sheet of ice holds it open, and lets the machine know the bin is full.

  7. ANJUM KHAN says:


    • If the unit is not switching back to freeze mode after the ice drops, or not cycling off when the water curtain stays open, either the actuator switch has failed or the actuator tab on the water curtain has broken off. This typically isn’t related to condensing unit issues and is a relatively easy repair.