Maytag · Dryer
Maytag Dryer F12 Error Code
Relay failure on the main control
What this error means
F12 indicates a drive relay on the main control failed its self-test. The board cannot reliably switch heat, motor, or valve outputs.
How F12 is detected
When F12 appears on a Maytag dryer, the control board has confirmed that water did not leave the machine within the programmed drain window. On Maytag MEDB855DC, Maytag MED6230HW, 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 F12 calls are resolved without parts: unplug five minutes and attempt one timed dry cycle. 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 F12 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
- Relay welded closed from age or surge
- Burnt relay driver transistor on the board
- Moisture intrusion on the relay bank
- Overloaded motor circuit stressing the relay
Step-by-step fixes
- 1Unplug five minutes and attempt one timed dry cycle
- 2Listen for heat or drum start—silence with F12 confirms output failure
- 3Inspect the board for burnt relay areas near heat outputs
- 4Note model number before ordering the control assembly
When to call a technician
F12 almost always requires main electronic control replacement—relays are not field-serviceable.
Affected models
- Maytag MEDB855DC
- Maytag MED6230HW
- Maytag MGDC465HW
Prevention & maintenance
- Clean drain filters and hose terminations monthly on high-use dryers to prevent F12 from lint and food debris buildup.
- Record when F12 appears in the cycle and whether it clears after a 60-second power reset on your Maytag dryer—that detail speeds diagnosis if you call service.
- Keep the model and serial number from the rating plate when ordering parts for F12; Maytag uses multiple revisions with different harness lengths and board firmware.
- Photograph wiring connector orientation before disconnecting any component while troubleshooting F12; reversed plugs on pumps and valves cause immediate repeat faults.