Maytag Washer F27 Error Code — What It Means
The F27 code tells you the washer’s control board has detected an overflow condition through the pressure switch. When the overflow contact on the pressure switch stays closed for more than 60 seconds, the machine assumes the tub is overfilled or the water-level sensing circuit is reporting a false overfill. The washer will shut the inlet valves, run the drain pump, and eventually lock out with the code if the condition persists.
This is a water-level sensing fault, not a simple drain blockage, though drain and valve problems can trigger it indirectly. The code points to an issue in the pressure-sensing circuit: the switch itself, the air hose that carries pressure signals from the tub, the inlet valves that should stop filling, or the drain system that should lower the water level fast enough.
Common Causes
- Inlet valve stuck open or leaking through A fill valve that does not shut off completely allows water to continue entering the tub even when the control commands it closed, triggering the overflow sensor.
- Pressure hose cracked, kinked, disconnected, or blocked The air hose running from the tub to the pressure switch can crack, fill with water or detergent, come loose, or be pinched, preventing accurate pressure sensing and causing a false overflow signal.
- Pressure switch failure or incorrect operation The switch may fail to open the overflow contact even when water level is normal, or it may become internally stuck or corroded.
- Drain pump weak or drain path restricted If the pump cannot lower the water level quickly enough or the drain hose is kinked or clogged, the control sees a sustained high-water condition and throws F27.
- Loose or corroded wiring at the pressure switch or control board Poor connections at the pressure-switch harness, drain-pump connector, or central control unit can cause intermittent or false overflow signals.
Step-by-Step Fix
- Unplug the washer and leave it unplugged for at least two minutes to clear any transient control-board faults and to make sure safe working conditions.
- Open the lid or door and check the tub for actual overfill or excessive suds; if water is above the normal fill line or foam is visible, let the machine drain completely and reduce detergent on the next load.
- Locate and inspect the pressure hose, a small-diameter air tube running from the bottom or side of the tub up to the pressure switch (often mounted near the control panel); look for cracks, kinks, disconnection, or water and soap inside the hose, and blow through it gently to confirm it is clear.
- Test the inlet valves by turning off the hot and cold supply taps, removing the fill hoses, and inspecting each valve solenoid and seat for debris or scale; turn the water back on briefly into a bucket to check that each valve closes fully when de-energized.
- Check all wiring and connectors at the pressure switch, drain pump, and central control board for corrosion, pushed-out pins, or loose contacts, and reseat each connector firmly.
- Inspect the drain system by removing the drain filter or pump cover (consult your service manual for location), clearing any lint, coins, or debris, and confirming the pump impeller spins freely and the drain hose has no kinks or clogs.
- Test the pressure switch by disconnecting the air hose and gently blowing into the switch port while listening for audible clicks as the contacts open and close; if you hear no clicks or only one, replace the switch; if all mechanical checks pass and the code returns, suspect the control board and consult a technician.
Parts Often Needed
| Part | Notes |
|---|---|
| Water inlet valve assembly | Amazon | Order the valve kit specific to your Maytag model number; check that all solenoid coils and seats are included. |
| Pressure switch (water-level switch) | Amazon | Match the switch part number to your washer; some are analog, others digital, and they are not interchangeable. |
| Pressure hose (air-trap hose) | Amazon | A length of flexible tubing, typically clear or translucent; buy the OEM hose or confirm inner diameter matches your tub fitting. |
| Drain pump | Amazon | Required if the pump is weak, noisy, or the impeller is cracked; verify voltage and mounting style before ordering. |
When to Call a Pro
If you have cleared the pressure hose, confirmed the inlet valves close properly, verified all wiring is tight and clean, and the F27 code still appears after a test cycle, the fault is likely in the pressure switch itself or the central control board. Pressure-switch testing requires a multimeter and familiarity with continuity checks, and control-board diagnosis involves live voltage measurements that can damage the board or injure you if done incorrectly. A qualified appliance technician has the service manual, wiring diagrams, and tools to isolate whether the switch is sending a false signal or the board is misinterpreting a valid one, and can replace either component safely and verify the repair with a full diagnostic cycle.