Scotsman Ice Ice Maker Error ER-4

⚡ Quick Answer: The Scotsman ice maker ER-4 error indicates a malfunction in the water fill system, resulting in insufficient ice production and potential unusual sou... ✅ DIY Fixable

What Does Error ER-4 Mean?

The Scotsman ice maker ER-4 error indicates a malfunction in the water fill system, resulting in insufficient ice production and potential unusual sounds from the water inlet valve. This can be caused by issues such as a blocked water supply line or a malfunctioning water inlet valve. Regular checks of the water filter and power supply are essential for proper functionality.

Possible Causes

  • Water Inlet Valve
  • Water Supply Line
  • Float Switch Malfunction

How to Fix Error ER-4

DIY Fix Check Scotsman ice maker symptoms and basic issues

  1. Inspect water supply line for kinks, blockages or improper connection.
  2. Ensure the water filter is not clogged or overdue for replacement.
  3. Verify the ice maker has proper power and reset by unplugging and plugging back in.
  4. Look for any other visible error codes or status lights per your model’s manual.

Technician Only Professional diagnostic and service recommended

  1. Check internal sensors, water level controls, and water inlet valve for faults.
  2. Use manufacturer diagnostic tools/manual to read specific model error codes.
  3. Inspect electrical connections on control board and communication lines.
  4. Perform full service and repair as needed based on diagnostic findings.

Parts needed: water inlet valve, water level sensor, control board

🛑 When to Call a Pro:
  • If the ER‑4 code persists after basic water and filter checks.
  • If there is any indication of internal sensor, wiring, or control board failure.

Technical Specifications

wattage 20W
component Water Inlet Valve
resistance 20-30 ohms
part_number Scotsman 12-1958-21
voltage_rating 120V AC

Common Questions

What does ER-4 error mean on Scotsman ice ice maker?

ER-4 indicates a water fill system failure, leading to low ice production.

Can I fix Scotsman ice ice maker ER-4 error myself?

Yes, check for water supply issues, inspect the filter, and reset the ice maker.

How much does it cost to fix ER-4 error?

Repair costs vary by region and complexity, depending on required parts.

When should I call a technician for ER-4?

Call a technician if ER-4 persists after basic checks or if internal components may be failing.

Sources & References

Data last verified: 2026-07-01

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