Maytag · Refrigerator
Maytag Refrigerator Error Code 27
Freezer thermistor signal fault
What this error means
Code 27 means the freezer compartment thermistor sent an out-of-range signal. Defrost timing and compressor run length depend on accurate freezer temperature feedback.
How 27 is detected
When 27 appears on a Maytag refrigerator, the control board has confirmed that water did not leave the machine within the programmed drain window. On Maytag MFI2570FEZ, Maytag MFF2055FRZ, 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 27 calls are resolved without parts: unplug and reseat the freezer thermistor plug behind the evaporator cover. 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 27 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
- Thermistor connector loose at the evaporator cover
- Broken wire in the door hinge harness on dispenser models
- Thermistor bulb detached from the evaporator clip
- Shorted sensor from water in the connector
Step-by-step fixes
- 1Unplug and reseat the freezer thermistor plug behind the evaporator cover
- 2Inspect wires for pinch at the cabinet liner
- 3Compare resistance to the Maytag service chart at room temperature
- 4Allow 24 hours stable temps after repair before judging performance
When to call a technician
Out-of-spec thermistor with intact wiring requires sensor W10316760 or equivalent.
Affected models
- Maytag MFI2570FEZ
- Maytag MFF2055FRZ
- Maytag MSS25C4MGW
Prevention & maintenance
- Clean drain filters and hose terminations monthly on high-use refrigerators to prevent 27 from lint and food debris buildup.
- Record when 27 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 27; Maytag uses multiple revisions with different harness lengths and board firmware.
- Photograph wiring connector orientation before disconnecting any component while troubleshooting 27; reversed plugs on pumps and valves cause immediate repeat faults.