Scotsman 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
- Inspect water supply line for kinks, blockages or improper connection.
- Ensure the water filter is not clogged or overdue for replacement.
- Verify the ice maker has proper power and reset by unplugging and plugging back in.
- Look for any other visible error codes or status lights per your model’s manual.
Technician Only Professional diagnostic and service recommended
- Check internal sensors, water level controls, and water inlet valve for faults.
- Use manufacturer diagnostic tools/manual to read specific model error codes.
- Inspect electrical connections on control board and communication lines.
- Perform full service and repair as needed based on diagnostic findings.
Parts needed: water inlet valve, water level sensor, control board
- 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.
Next step
Choose the next step for ER-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.
Most relevant component to inspect
Water Inlet Valve
Controls the flow of hot and cold water into the appliance.
- Typical part-only price
- $25 - $60
- 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.
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.
Main Control Board
The central brain of the appliance that controls all components, cycles, and timings.
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.
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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: 2026-07-26
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