What AH Sensor Means
This specific pattern — a drawer microwave that reliably stops around 16 seconds into a cycle — points to the humidity/steam sensor used for automatic "sensor cook" programs. That sensor measures moisture released from food early in the cycle to calculate how much time is needed; when it can't get a valid reading, some models stop or problem out at roughly that same point every time.
Common Causes of AH Sensor
- A failed or dirty humidity/steam sensor used for automatic sensor-cook programs
- Condensation or residue affecting the sensor's vent path
- A control board problem reading the sensor incorrectly
🔧 One Safe Check You Can Try
Try running the same food item on a manual time/power setting instead of an automatic sensor-cook program. If it runs normally on manual settings and only fails on sensor-cook programs, that confirms the issue is isolated to the humidity sensor rather than the whole unit.
⚠ Why You Shouldn't Go Further Than That
- The sensor and its vent path are integrated into the cavity and control housing — not a simple exterior clean.
- Manual settings should work fine in the meantime, so there's no need to force a fix before a proper diagnosis.
- Misdiagnosing this as a magnetron or heating problem (since the unit "stops") could lead to replacing parts that were never the problem.
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.