Scotsman Ice Ice Maker Error ER-3

⚡ Quick Answer: The Scotsman Ice ice maker ER-3 error indicates a malfunction related to the water level sensor, typically caused by the unit failing to detect proper... ✅ DIY Fixable

What Does Error ER-3 Mean?

The Scotsman Ice ice maker ER-3 error indicates a malfunction related to the water level sensor, typically caused by the unit failing to detect proper water fill or presence in the reservoir. This problem often results in the machine stopping ice production and displaying the error code, which may be accompanied by a continuous beeping sound. Common causes include dirty sensors, faulty water inlet circuits, or issues with water supply.

Common Symptoms:

  • Machine stops making ice and shuts down
  • Indicator or error display shows code 3
  • Unit may automatically retry on water resupply

Possible Causes

  • Water sensors not detecting water in reservoir or fill chamber (medium)
  • Dirty or fouled water level sensors or probes (medium)
  • Faulty water inlet or fill circuit affecting water supply (medium)

How to Fix Error ER-3

DIY Fix Check water supply and basic conditions

  1. Ensure water supply valve is fully open
  2. Check that water pressure meets manufacturer recommendations
  3. Inspect for kinks or blockages in water line

DIY Fix Clean water sensors and probes

  1. Turn off and unplug the ice maker
  2. Locate the water level sensors or probes per your manual
  3. Clean sensors thoroughly with descaling solution to remove scale or debris
  4. Reconnect and power on unit to test

Technician Only Inspect and test water inlet valve and sensor wiring

  1. Test water inlet valve operation and continuity
  2. Check wiring harnesses to water sensors for damage, loose connections, or corrosion
  3. Replace faulty water level sensors or inlet valve if necessary
  4. Verify proper calibration of sensors after replacement

Parts needed: water level sensor, water inlet valve, sensor wiring harness

🛑 When to Call a Pro:
  • Persistent Code 3 after cleaning sensors and verifying water supply
  • Signs of water leaks or electrical issues during inspection

Technical Specifications

wattage N/A
component Water Level Sensor
resistance 1-5 ohms
part_number Scotsman 12-1952-21
voltage_rating 120V AC

Common Questions

What does ER-3 error mean on Scotsman Ice ice maker?

ER-3 indicates a malfunction in the water level sensor, causing the machine to stop making ice.

Can I fix Scotsman Ice ice maker ER-3 error myself?

Yes, you can check the water supply, clean sensors, and verify connections.

How much does it cost to fix ER-3 error?

Estimated repair costs range from $50 to $200 for parts, plus labor.

When should I call a technician for ER-3?

Call a technician if the error persists after cleaning or if you notice water leaks.

Sources & References

Data last verified: 2026-07-01

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