Scotsman Ice Maker Error 4

⚡ Quick Answer: The Scotsman Ice ice maker error 4 indicates a malfunction related to high discharge temperatures or improper refrigeration pressures. This can cause ... ✅ DIY Fixable

What Does Error 4 Mean?

The Scotsman Ice ice maker error 4 indicates a malfunction related to high discharge temperatures or improper refrigeration pressures. This can cause the unit to stop or cycle off during operation. Symptoms may include failure to produce ice and unusual humming sounds, often occurring after some runtime. This error typically signals that the water inlet valve is not functioning correctly, requiring further inspection.

Common Symptoms:

  • Unit stops/cycles off during operation when code 4 occurs
  • Error triggered after some run time indicating thermal or pressure conditions

Possible Causes

  • High discharge temperature detected by the control system (medium)
  • Refrigeration pressure outside normal range (medium)

How to Fix Error 4

DIY Fix Basic checks before service

  1. Ensure the ice maker has adequate airflow around condenser vents (clear obstructions and clean dust).
  2. Check that ambient temperatures are within recommended operating ranges.
  3. Power cycle the unit by turning off, waiting a few minutes, and restarting to see if the error persists.

Technician Only Refrigeration system inspection

  1. Measure discharge temperature and pressures to verify system operation within specifications.
  2. Inspect condenser coils and fans for adequate airflow and cleanliness.
  3. Check refrigerant charge level and superheat; repair leaks and recharge system if necessary.

Parts needed: Refrigerant, Condenser fan or coils, Pressure sensors/thermistors

🛑 When to Call a Pro:
  • If repeated Code 4 errors occur after basic airflow and ambient checks
  • If refrigeration pressures/temperatures are outside service manual specification ranges
  • If there are signs of refrigerant leakage

Next step

Choose the next step for 4

Confirm the diagnosis before ordering. An error code can identify the system involved, but it does not prove that a specific part has failed.

Based on diagnostic data

Most relevant component to inspect

Thermistor

Measures precise temperature changes and sends resistance feedback to the control board.

Typical part-only price
$15 - $35
DIY difficulty
Easy
Estimated time
15-30 mins
Where can I find the model number?

Check the rating label around the door, lid, frame, rear panel, or inside the appliance cabinet. Use the complete model number, including suffixes.

Find a part that fits my model

Verify the complete model and part number on the retailer's compatibility page before ordering.

Other parts options

Check related components first; use model search as a fallback.

Model number required

Model-compatible Ice Maker parts

Enter the complete model number to browse compatible replacement parts. This is a model-based parts search, not a diagnosis that a specific component failed.

Find a part that fits my model

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Technical Specifications

wattage N/A
component Water Inlet Valve
resistance 10-30 ohms
part_number Scotsman 12-1899-21
voltage_rating 120V AC

Common Questions

What does 4 error mean on Scotsman Ice ice maker?

Error 4 indicates high discharge temperature or refrigeration pressure issues, causing the unit to stop or cycle off.

Can I fix Scotsman Ice ice maker 4 error myself?

Yes, check for adequate airflow, ambient temperatures, and power cycle the unit before seeking professional help.

How much does it cost to fix 4 error?

Repair costs range from $150 to $500+, depending on the specific repairs needed.

When should I call a technician for 4?

Call a technician if the error persists after basic checks, or if there are signs of refrigerant leakage.

Sources & References

Data last verified: 2026-07-26

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