KitchenAid Refrigerator E5 Error Code - Causes & Fix

KitchenAid Refrigerator E5 Error Code — What It Means

The E5 error code on Whirlpool-built KitchenAid French-door and side-by-side refrigerators signals a discrepancy between the ice maker thermistor and the ice room (ice box) thermistor. The control board compares these two temperature sensors during the ice maker diagnostic routine and throws E5 when their readings do not make sense together. This fault does not tell you which sensor is bad or whether you have a real temperature problem in the ice compartment.

Because the code reflects a relationship between two sensors, either thermistor can be the root cause, or the ice room may actually be too warm and both sensors are reading correctly. Field reports show E5 appearing alongside warm refrigerator conditions, water in the ice tray, and incomplete freezing, so treat this as both a sensor fault and a possible cooling issue.

Jump to Fix

Common Causes

• Ice box thermistor out of spec The ice room sensor has drifted or failed and no longer matches the ice maker thermistor, even though the code may seem to blame the ice maker itself.
• Ice maker thermistor out of spec The thermistor inside or attached to the ice maker assembly has failed and reads incorrectly compared to the ice box sensor.
• Warm ice compartment temperature Restricted airflow, a damper problem, or compressor issues cause the ice room to run warm, creating a legitimate mismatch that both sensors report accurately.
• Ice maker thermistor wiring or connection fault A loose connector or damaged wire at the ice maker thermistor creates an intermittent or invalid signal to the control board.
• Ice room thermistor wiring or connection fault Corrosion or a pinched wire at the ice box thermistor harness causes erratic readings that trigger the discrepancy code.

Step-by-Step Fix

1. {‘lead’: ‘Enter service diagnostics’, ‘text’: ‘and navigate to the ice maker error-code test (often test 56 on these models) to confirm the E5 fault is present and repeatable.’}
2. {‘lead’: ‘Inspect the ice room for temperature issues’, ‘text’: ‘before replacing any sensors, because the code may be responding to a real cooling problem rather than a single failed thermistor.’}
3. {‘lead’: ‘Check airflow and damper operation’, ‘text’: ‘to the ice compartment to rule out blockages, frost buildup, or a stuck damper that would create a genuine warm condition.’}
4. {‘lead’: ‘Test the ice box thermistor’, ‘text’: ‘for out-of-spec resistance or open circuit, keeping in mind that this sensor is a common root cause even when the code appears to implicate the ice maker.’}
5. {‘lead’: ‘Test the ice maker thermistor’, ‘text’: ‘and inspect its wiring harness for damage, corrosion, or loose pins that could produce an invalid reading.’}
6. {‘lead’: ‘Replace the failed thermistor’, ‘text’: ‘or the entire ice maker assembly if the ice maker thermistor is integral and not sold separately for your model.’}
7. {‘lead’: ‘Rerun diagnostics and confirm the code clears’, ‘text’: ‘and that ice production resumes with normal freezing and no water pooling in the tray.’}

Parts Often Needed

When to Call a Pro

Call a technician if you are not comfortable entering service diagnostics or if the E5 code returns after you have replaced both thermistors. A persistent fault often points to a control-board issue, a refrigerant leak, or a sealed-system problem that requires manifold gauges and EPA-certified refrigerant handling. Also call for help if you see related error codes, hear unusual compressor noises, or notice the entire refrigerator running warm, because those symptoms go beyond a simple thermistor swap and require systematic airflow and cooling-circuit diagnosis.