Ice-O-Matic Error 4 (CIM): Thermistor Failure Alternate (CIM Series)
Severity
high
Difficulty
Advanced
Time
30-60 min
Pro Cost
$150-$350
| Error Code | Error 4 (CIM) |
|---|---|
| Meaning | Thermistor Failure Alternate (CIM Series) |
| Quick Fix | Inspect thermistor wiring at both sensor and board ends |
| Tools Needed | Multimeter |
| Affected Models | CIM0320, CIM0430, CIM0530, CIM0636, CIM0836, CIM1136, CIM1446, CIM2046 |
Ice-O-Matic Error Error 4 (CIM) indicates thermistor failure alternate (cim series). CIM series Error 4 is a secondary thermistor error indication. The Power LED flashes once per second with the Clean LED off. Related to Error 2 but may appear under different operating conditions or board revisions.
What Causes Ice-O-Matic Error Error 4 (CIM)?
Possible Causes
- 1 Thermistor sensor reading outside expected resistance range
- 2 Intermittent wiring connection that fails under vibration
- 3 Control board input circuit not reading thermistor correctly
Affected Models
Houston Climate Factor
Houston's humid environment promotes connector corrosion. Clean and reseat thermistor connectors during every service visit.
Tools & Parts You'll Need
Tools Required
- Multimeter
Parts That May Be Needed
- Thermistor sensor $25-$45
- Control board (if needed) $400-$800
How to Fix Ice-O-Matic Error Error 4 (CIM)
Follow these steps to troubleshoot and potentially resolve the Error 4 (CIM) error on your Ice-O-Matic ice machine.
Before You Start
- 1. Disconnect power — unplug your Ice-O-Matic ice machine
- 2. Turn off water supply — prevent leaks during repair
- 3. Check warranty — DIY repairs may void coverage
Step 1
Inspect thermistor wiring at both sensor and board ends
Step 2
Disconnect and firmly reconnect all thermistor-related connectors
Did these steps resolve the error?
Great news!
To prevent this from happening again, check the prevention tips below.
View Prevention TipsLooks like you need a pro
This Error 4 (CIM) error on your Ice-O-Matic may require professional diagnosis. Houston technicians can typically resolve this for $150-$350.
How to Prevent Ice-O-Matic Error Error 4 (CIM)
Inspect wiring connections during routine service
Install surge protector
Keep electrical compartment dry and clean
When to Call a Ice-O-Matic Professional
Thermistor replacement and board diagnostics require professional equipment.
Frequently Asked Questions
What does Ice-O-Matic error Error 4 (CIM) mean?
CIM series Error 4 is a secondary thermistor error indication. The Power LED flashes once per second with the Clean LED off. Related to Error 2 but may appear under different operating conditions or board revisions.
How do I fix Ice-O-Matic Error 4 (CIM) error?
To fix Ice-O-Matic Error 4 (CIM): Inspect thermistor wiring at both sensor and board ends. Disconnect and firmly reconnect all thermistor-related connectors. Thermistor replacement and board diagnostics require professional equipment.
Is Ice-O-Matic Error 4 (CIM) serious?
Ice-O-Matic Error 4 (CIM) is rated as high severity. Professional service is recommended to avoid further damage.
How much does it cost to fix Ice-O-Matic Error 4 (CIM)?
Typical repair cost for Ice-O-Matic Error 4 (CIM) is $150-$350. This includes diagnosis, parts, and labor. Professional ice machine cleaning in Houston starts at $199.
What tools do I need to fix Ice-O-Matic Error 4 (CIM)?
You'll need: Multimeter. Always disconnect power before starting any repairs.
Can I fix Ice-O-Matic Error 4 (CIM) myself?
This repair is rated as advanced difficulty. This typically requires professional training and specialized tools. Estimated time: 30-60 min.
Other Ice-O-Matic Error Codes
View all Ice-O-Matic codes →Diagnostic Tools
Need Help With Ice-O-Matic Error Error 4 (CIM)?
Houston Ice-O-Matic specialists available for same-day service. Get a free quote in minutes.