Why is the clean light flashing yellow on my Ice-O-Matic ice machine?
Short answer: Cleaning reminder. If your Ice-O-Matic Elevation Series CIM cubers is showing POWER solid red + CLEAN slow flash yellow, 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?
This LED combination indicates the unit needs to be cleaned. The control board has a Cleaning Needed Reminder set for every 6 months by default, or every 3 months when switch 3 on the board's adjustment block is on (recommended for hard-water locations).
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?
- The board's Cleaning Needed Reminder has elapsed — every 6 months by default, or 3 months if switch 3 is set for hard water
- This is a reminder, not a breakdown
Can you fix it yourself?
Yes, fully. Empty the bin, run a manual harvest (hold Power 3 seconds), quick-press Clean, add the listed amount of nickel-safe cleaner when the sump refills, let the cycles finish, then sanitize separately — never mix cleaner and sanitizer — and press Power to resume.
Step by step — what to try, in order:
- Remove all ice from the bin, then remove the front panel
- Hold Power 3 seconds to run a manual harvest so the plate is clear and the sump empties
- Quick-press Clean; when the sump refills, add nickel-safe ice machine cleaner in the amount listed for your model, and let the wash/purge/rinse cycles complete
- Sanitize with an approved sanitizer after descaling (never mix cleaner and sanitizer), then quick-press Power to resume ice making
- Nickel-safe ice machine cleaner — Use the cleaner your machine's manual specifies — generic acid descalers can strip a nickel-plated evaporator.
- Nu-Calgon IMS-II ice machine sanitizer (4211-34) — Use the sanitizer your manual specifies, as a separate step after cleaning. Never mix cleaner and sanitizer.
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When do you need a technician — and why?
The routine cleaning is in-house work. A service agent matters only if scale remains on the evaporator after a full descale or production stays low afterward — that calls for a component-level cleaning of the water system that goes deeper than the on-board cycle.
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 POWER solid red + CLEAN slow flash yellow mean on an Ice-O-Matic Elevation Series CIM cubers?
Cleaning reminder. This LED combination indicates the unit needs to be cleaned. The control board has a Cleaning Needed Reminder set for every 6 months by default, or every 3 months when switch 3 on the board's adjustment block is on (recommended for hard-water locations).
Can I fix POWER solid red + CLEAN slow flash yellow on an Ice-O-Matic Elevation Series CIM cubers myself?
Yes, fully. Empty the bin, run a manual harvest (hold Power 3 seconds), quick-press Clean, add the listed amount of nickel-safe cleaner when the sump refills, let the cycles finish, then sanitize separately — never mix cleaner and sanitizer — and press Power to resume.
When does POWER solid red + CLEAN slow flash yellow on an Ice-O-Matic Elevation Series CIM cubers need a technician?
The routine cleaning is in-house work. A service agent matters only if scale remains on the evaporator after a full descale or production stays low afterward — that calls for a component-level cleaning of the water system that goes deeper than the on-board cycle. If mineral scale remains on the evaporator after a full descale, or production stays low, have a service agent do a full water-system component cleaning.
No public manufacturer service manual found for this code. The information above is drawn from webstaurantstore.com, not a Manitowoc/Hoshizaki/Ice-O-Matic/Scotsman document.