Bosch · Dryer
Bosch Dryer E07 Error Code
Moisture sensor signal invalid
What this error means
E07 reports a fault in the moisture sensing circuit—the two curved metal strips inside the drum opening did not send valid conductivity readings. Auto-dry programs stop early or refuse to start because the board cannot judge remaining dampness.
How E07 is detected
When E07 appears on a Bosch dryer, the control board has confirmed that water did not leave the machine within the programmed drain window. On Bosch WTG86401UC, Bosch WQB245AXUC, and similar variants, the drain pump runs for a fixed interval—often three to seven minutes on washers and dishwashers—while a pressure switch or turbidity sensor verifies the tub or sump is empty. If water remains, the cycle stops to prevent spin with a full tub or overflow on the next fill.
Most E07 calls are resolved without parts: unplug and wipe both curved metal strips inside the door opening with isopropyl alcohol on a soft cloth. Restricted drain paths mimic pump failure because the impeller spins against a blocked hose or filter. Document whether the pump hums audibly during the drain step; a humming pump with no water movement points to a clogged filter or kinked hose, while silence may indicate a failed pump motor or loose wiring at the harness.
After clearing blockages, run a short cycle and listen at the drain hose for steady water flow. If E07 returns on the next load with a clean filter and straight hose, measure resistance at the pump motor connector per the service manual for your model before ordering a replacement pump assembly.
Common causes
- Dryer-sheet residue insulating the moisture sensor bars
- Corrosion on sensor strips in humid laundry rooms
- Broken wire at the sensor harness inside the front bulkhead
- Control board moisture input circuit failure
Step-by-step fixes
- 1Unplug and wipe both curved metal strips inside the door opening with isopropyl alcohol on a soft cloth
- 2Avoid dryer sheets for one test cycle—or use a timed dry program to bypass auto-dry sensing
- 3Inspect strips for bending or damage from zippers scraping the drum lip
- 4Reset power thirty seconds after cleaning and run a medium timed cycle
When to call a technician
E07 on timed dry with clean strips points to sensor harness or board replacement behind the front panel.
Affected models
- Bosch WTG86401UC
- Bosch WQB245AXUC
- Bosch WTG865H4UC
Prevention & maintenance
- Clean drain filters and hose terminations monthly on high-use dryers to prevent E07 from lint and food debris buildup.
- Record when E07 appears in the cycle and whether it clears after a 60-second power reset on your Bosch dryer—that detail speeds diagnosis if you call service.
- Keep the model and serial number from the rating plate when ordering parts for E07; Bosch uses multiple revisions with different harness lengths and board firmware.
- Photograph wiring connector orientation before disconnecting any component while troubleshooting E07; reversed plugs on pumps and valves cause immediate repeat faults.