Maytag · Refrigerator
Maytag Refrigerator Error Code 23
Defrost heater circuit open
What this error means
Code 23 indicates the adaptive defrost system detected an open defrost heater circuit. Frost will accumulate on the evaporator until airflow fails.
How 23 is detected
When 23 appears on a Maytag refrigerator, the control board has confirmed that water did not leave the machine within the programmed drain window. On Maytag MFF2055FRZ, Maytag MFI2570FEZ, and similar variants, the drain pump runs for a fixed interval—often three to seven minutes on washers and dishwashers—while a pressure switch or turbidity sensor verifies the tub or sump is empty. If water remains, the cycle stops to prevent spin with a full tub or overflow on the next fill.
Most 23 calls are resolved without parts: unplug and remove the freezer rear panel to expose the evaporator. Restricted drain paths mimic pump failure because the impeller spins against a blocked hose or filter. Document whether the pump hums audibly during the drain step; a humming pump with no water movement points to a clogged filter or kinked hose, while silence may indicate a failed pump motor or loose wiring at the harness.
After clearing blockages, run a short cycle and listen at the drain hose for steady water flow. If 23 returns on the next load with a clean filter and straight hose, measure resistance at the pump motor connector per the service manual for your model before ordering a replacement pump assembly.
Common causes
- Open defrost heater element under the evaporator coils
- Defrost thermal fuse blown from prolonged heater run
- Loose spade connector on the heater harness
- Ice choking the defrost drain causing repeated heat overload
Step-by-step fixes
- 1Unplug and remove the freezer rear panel to expose the evaporator
- 2Inspect the heater wire for breaks along the coil loop
- 3Test continuity through the heater and thermal fuse
- 4Clear the drain tube while the panel is off
When to call a technician
Open heater or blown defrost fuse requires part replacement and a forced defrost verification.
Affected models
- Maytag MFF2055FRZ
- Maytag MFI2570FEZ
- Maytag MSS25C4MGW
Prevention & maintenance
- Clean drain filters and hose terminations monthly on high-use refrigerators to prevent 23 from lint and food debris buildup.
- Record when 23 appears in the cycle and whether it clears after a 60-second power reset on your Maytag refrigerator—that detail speeds diagnosis if you call service.
- Keep the model and serial number from the rating plate when ordering parts for 23; Maytag uses multiple revisions with different harness lengths and board firmware.
- Photograph wiring connector orientation before disconnecting any component while troubleshooting 23; reversed plugs on pumps and valves cause immediate repeat faults.