Maytag Dryer F03 Error: Thermistor fault
What Does Maytag Dryer Error Code F03 Mean? F03 indicates a fault in the drum cavity thermistor circuit on Maytag Bravos XL and Centennial dryers (MEDB and MEDX series). The cavity thermistor is a temperature-sensitive resistor that feeds real-time drum temperature data to the control board. The board uses this data to regulate the heating […]
Quick Assessment
Answer to continue safely
Is it safe to keep using?
No. F03 disables heating. Attempting to use the dryer without a functional thermistor risks uncontrolled overheating if the fault state allows the heater to run unchecked.
Can I reset the code?
Yes. A hard reset clears transient F03 events. Persistent F03 after reset indicates a component failure requiring thermistor or wiring repair.
When to stop immediately?
Stop if you notice: F03 returns on every cycle after reset, No heat on any cycle and F03 is confirmed.
Symptoms You May Notice
Dryer tumbles with no heat
The drum rotates normally but no heat is produced — the control has disabled the heating circuit as a safety measure.
Clothes remain completely cold after a cycle
Because heating is blocked, laundry exits the drum at room temperature regardless of cycle selection.
F03 may appear mid-cycle if the thermistor is intermittently failing
An intermittently failing thermistor can allow a cycle to begin normally, then generate F03 partway through as the component temperature causes resistance to shift out of range.
Clothes still damp after full cycle
The complete cycle runs but produces no heat, leaving laundry damp.
Possible Causes
Failed cavity thermistor
The drum cavity thermistor itself has an open circuit (infinity resistance) or shorted resistance (near zero ohms). Both conditions produce F03 on Maytag MEDB and MEDX platforms.
Requires ProfessionalBroken or disconnected thermistor wiring harness
The wire leads connecting the thermistor to the control board have broken, corroded, or pulled free from the connector, presenting an open circuit to the control even if the thermistor itself is functional.
Requires ProfessionalControl board thermistor input circuit fault
Rarely, the control board's input circuit for the thermistor signal has failed, causing the board to read out-of-range values even with a good thermistor installed.
Requires ProfessionalSafe Checks You Can Do
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1
Hard reset to rule out transient fault
Disconnect the dryer from power for 5 minutes, then restore power and attempt a cycle. A transient electrical noise event occasionally causes a false F03 reading on Maytag Bravos control boards. If the reset resolves F03 and it does not return, no further action is needed.
Document whether F03 returns on the same cycle or after a few runs — intermittent return helps the technician pinpoint a failing thermistor vs. a wiring harness issue.
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2
Note the thermistor location for the technician
On Maytag Bravos XL models (MEDB/MEDX), the cavity thermistor is located inside the dryer drum area, typically mounted on the front bulkhead or rear drum housing depending on the model year. Sharing this detail with the technician speeds up the service call.
The thermistor part number for most Maytag MEDB Bravos models is W10436765 or a compatible replacement — confirm via your model number before ordering.
When to Call a Professional
Contact a qualified technician if:
- Thermistor resistance testing with a multimeter (requires disassembly)
- Wiring harness inspection and repair or replacement
- Control board thermistor input circuit diagnosis
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