What does Error 2 mean on an Ice-O-Matic ice machine?

Short answer: Thermistor failure. If your Ice-O-Matic Elevation Series CIM cubers is showing Error 2 (POWER LED slow flash, OFF state), the controller has logged a specific, documented condition. This page covers what it means, what causes it, what you can safely fix yourself, and when — and why — it takes a technician.

What exactly is the machine telling you?

The service manual defines Error 2 as a thermistor failure, shown as a slow flash of the Power LED while the unit is in the OFF state. The thermistor gauges sump water temperature and triggers the anti-slush cycle.

Which machines show this?

Ice-O-Matic Elevation Series CIM cubers — the CIM-model machines (CIM0330, CIM0530, CIM0836, CIM1136 and similar) that replaced the older ICE Series as Ice-O-Matic's current electronic cube line. There's no text display: the board talks through the Power and Clean LEDs on the touch pad, using color and flash pattern — a quick red flash is Error 1, a slow red flash in the off state is Error 2, red plus yellow quick-flashing together is Error 3. Write down the exact pattern before you reset (hold Power and Clean about 3 seconds, then press Power), because the pattern is the diagnosis. Inside, board LEDs also show the state of each curtain and float switch, which a technician will use on arrival.

What causes it?

• A failed sump-water thermistor — the sensor that triggers the anti-slush cycle
• A bad connection between the thermistor and the control board

Can you fix it yourself?

Not really. One power cycle (off at the push pad, power disconnected a minute, then restart) is the only staff move. If the slow red flash comes back, leave the unit off and book service.

Step by step — what to try, in order:

1. Power-cycle the machine: turn it off at the push pad, disconnect power for a minute, then restore power and restart
2. If the code returns, leave the unit off and schedule service — the thermistor is a board-connected sensor

What to check before you call

• Read the exact LED pattern — Error 2 is a slow red flash of the Power LED while the unit is OFF. A quick red flash is Error 1, and red plus yellow quick-flashing is Error 3. Write it down before resetting.
• One full power cycle — Turn it off at the push pad, disconnect power for a minute, then restore power and restart.
• Whether the slow flash returns — If it does, leave the unit off and book service.

When do you need a technician — and why?

The thermistor is a board-connected sensor inside the control area; confirming and replacing it means opening that compartment and working around live electrical components, which is why the manual routes this one to a technician.

Parts a technician may look at

Based on the causes listed for this code (not a parts order — a tech confirms first):

• Sump water thermistor
• Thermistor connection to the control board

What might it cost?

Typically a service call plus a modest part. When a technician is needed, this is usually a diagnostic visit plus a sensor, switch, valve, or similar small component. A rough, hedged range is a few hundred dollars in total — often in the $200–$500 band — but parts prices and labor rates vary a lot by model and area. Get a quote.

These are rough, typical ranges, not quotes; we don't have pricing data for your area or your exact model.

If it does come to a service call and you're in Nashville, TN or Birmingham, AL, we maintain independently compiled lists of local companies that service commercial ice machines — real businesses with verified contact information, none of whom paid to be listed.

Related questions

What does Error 2 (POWER LED slow flash, OFF state) mean on an Ice-O-Matic Elevation Series CIM cubers?

Thermistor failure. The service manual defines Error 2 as a thermistor failure, shown as a slow flash of the Power LED while the unit is in the OFF state. The thermistor gauges sump water temperature and triggers the anti-slush cycle.

Can I fix Error 2 (POWER LED slow flash, OFF state) on an Ice-O-Matic Elevation Series CIM cubers myself?

Not really. One power cycle (off at the push pad, power disconnected a minute, then restart) is the only staff move. If the slow red flash comes back, leave the unit off and book service.

When does Error 2 (POWER LED slow flash, OFF state) on an Ice-O-Matic Elevation Series CIM cubers need a technician?

The thermistor is a board-connected sensor inside the control area; confirming and replacing it means opening that compartment and working around live electrical components, which is why the manual routes this one to a technician. Call a technician if the slow red flash reappears after a power cycle; the thermistor or its connection needs professional replacement.

What does the thermistor do on an Ice-O-Matic CIM?

It gauges sump water temperature and triggers the anti-slush cycle, which is why the board stops when it can't trust the reading.

Can I replace the Ice-O-Matic thermistor myself?

The repo's guidance says no. It's a board-connected sensor in the control area, and the manual routes the replacement to a technician.

Source: ice-o-matic-cim0330fa-service-manual.pdf (s1.img-b.com)