Bosch HMB50152UC 500 Series 30 in Built-In Microwave SE Error Fix: Sensor Error — Humidity Sensor

Error code SE on the Bosch HMB50152UC 500 Series 30 in Built-In Microwave means: Sensor Error — Humidity Sensor. The humidity sensor detected an abnormal reading during a sensor cook cycle. This may be a temporary condition. Ensure the microwave interior is clean and dry before starting a sensor cook cycle. Do not open the door during a sensor cook cycle — this disrupts the humidity reading. If persistent, the humidity sensor may need replacement. On some models, "SE" is functionally equivalent to E2. Try using manual cook mode (time and power) as a workaround.

The most successful fix is "Test and Replace Humidity Sensor" (medium difficulty, ~45 minutes). Estimated DIY cost: $30-$50. HomeMD has 2 community-ranked fixes for this error.

This error is rated low severity. It is generally not urgent and can often be resolved with a simple DIY fix.

Yes — the top-ranked community fix ("Test and Replace Humidity Sensor") is rated medium difficulty and takes about 45 minutes. Tools needed: T15 Torx screwdriver, Multimeter.

DIY cost: $30-$50. Professional repair typically costs $150-$220. Many homeowners save money by trying the top-ranked community fix first.

The Bosch HMB50152UC 500 Series 30 in Built-In Microwave has 5 other known error codes, including: E1 (Magnetron Failure — Not Heating), E2 (Humidity / Steam Sensor Failure), E3 (Temperature Sensor / Thermostat Error), E4 (Door Switch / Interlock Failure), E5 (Control Panel / Touchpad Error).

Error code SE also appears on 5 other Bosch models: HMC80152UC 800 Series 30 in Convection Speed Microwave, HMC80252UC 800 Series 30 in Speed Microwave Oven, HMD8451UC 800 Series 24 in Drawer Microwave, HMV3053U 300 Series 30 in Over-the-Range Microwave, HMV5053U 500 Series 30 in Over-the-Range Microwave. The fix may vary by model, so check each model's specific page for tailored repair steps.