NTC Heater Sensor Open Circuit
The F2 error code on your Miele Oven indicates ntc heater sensor open circuit. This is a High severity issue. The NTC temperature sensor for the oven heater has an open circuit — the wire is broken or the sensor has failed. Found on older Miele H-series ovens. The control board cannot read the oven […]
~5%
DIY Fixable
From $150
Typical Repair Cost
1–2 hrs
Pro Repair Time
Quick Assessment
Answer to continue safely
Is it safe to keep using?
No. The oven has no temperature feedback — it cannot heat safely.
Can I reset the code?
No. No — an open circuit means a physical break that cannot be fixed by resetting.
When to stop immediately?
Stop if you notice: F2 appears — this always requires repair, Visible broken wire.
Symptoms You May Notice
"F2" on the display
Appears when the oven attempts to start a heating cycle.
Oven will not heat
The oven refuses to start because it has no temperature feedback.
Temperature display shows incorrect reading
May show maximum or zero temperature.
Possible Causes
NTC sensor wire broken
The thin wire connecting the sensor to the board has fractured — often from heat cycling over many years.
Requires ProfessionalNTC sensor failed open
The thermistor element itself has failed with infinite resistance.
Requires ProfessionalLoose connector
The plug connecting the NTC wire to the control board has come loose.
Requires ProfessionalSafe Checks You Can Do
-
1
Power cycle
Turn off at the breaker for 5 minutes and restart.
A loose connector may reseat itself, but this is unlikely.
-
2
Visual inspection
Look at the NTC sensor probe inside the oven (thin metal rod, usually top or back wall). Check if the wire is visibly severed.
If you can see a broken wire, the sensor needs replacement.
When to Call a Professional
Contact a qualified Miele technician if:
- NTC reads infinite resistance (multimeter check)
- Sensor wire fractured
- Connector pins corroded
Need Professional Help?
Find qualified Miele technicians in your area for proper diagnostics and repair.
Oven Repair Service Schedule Appointment