What F44 Means
F44 on a Miele microwave-combination oven means communication between the control electronics and the power electronics has been interrupted. Miele’s documented remedy checks the connector between the two first and names a defective control electronics module as the alternative.
Common Causes of F44
- Connector between the control and power electronics defective or unseated
- Control electronics module failed
- Wiring between the two boards damaged
- Vibration or heat cycling working a contact loose over time
🔧 One Safe Check You Can Try
Isolate the appliance at the breaker for a couple of minutes and restore power. A combination oven that comes back and behaves is worth watching rather than booking; one that shows the code again straight away has a real interruption in that link.
⚠ Why You Shouldn't Go Further Than That
- A microwave-combination appliance is not one to open speculatively: the high-voltage capacitor in the microwave section holds a charge after disconnection and is discharged deliberately, not hoped away.
- Miele checks the connector before the board, and a board fitted to cure a loose plug solves nothing.
- The control electronics is matched to the appliance and set up after fitting.
Opening a panel to inspect or repair something yourself doesn't automatically cancel your manufacturer's warranty — but it can risk accidental damage, and some manufacturers do have specific service conditions. Check your product's warranty terms, or ask us, before deciding.
Technical Reference
- Code
- F44
- Appliance
- Miele microwave
- Maker documentation
- Miele owner manuals and use & care guides
- Checked
- September 2026
Code meanings can change between control generations. Before acting on a code, match the full model number on your appliance's rating label against the manual for that model. We are an independent repair service, not affiliated with Miele & Cie. KG.