Bosch
Washing Machine
⚠️ Stop Using
Bosch Washing Machine Error Code E43
Bosch Washing Machine error code E43: Door lock triac failure (control board).
Should I unplug it?
⚠️ Stop using it
Safe to leave powered off. Do not attempt to repair circuit boards without electronics experience.
Can I fix it myself?
Technician Recommended
Part: Control board / PCB
How much will it cost?
DIY: $80–$300 (board replacement)
Technician: $200–$600
⏱ 30–90 min
What Does Error E43 Mean on Your Bosch Washing Machine?
Bosch Washing Machine error code E43: Door lock triac failure (control board).
What typically fails: Control board / PCB
What You're Probably Seeing
- → Cycle won't start
- → Door won't open after cycle
- → Error code on display
What to Try First
- 1 Unplug the washing machine for 60 seconds then plug back in — this resets the control board and clears many temporary faults
- 2 Check door seal for debris or warping preventing full closure
- 3 Test the door latch mechanism — if it clicks but machine won't start, the switch is faulty
- 4 Replace the door lock assembly ($25–$80 part, 15–30 min DIY)
- 5 Check all wiring harness connections to the main control board — reseat any loose connectors
🛠️ You'll need: Screwdriver set, Multimeter
· Time: 30–90 min
💡 Try this first: Unplug the appliance for 60 seconds, then plug back in. This resets the control board and clears many temporary faults.
Questions People Also Ask
What does Bosch Washing Machine error code E43 mean? ▼
Error code E43 on a Bosch Washing Machine means: Door lock triac failure (control board). The appliance detected this condition and has stopped or limited operation to prevent further damage.
How do I fix Bosch Washing Machine error code E43? ▼
First, unplug the washing machine for 60 seconds to reset the control board. If error E43 returns, the root cause (door lock triac failure (control board)) needs to be addressed — check connections, filters, and hoses before calling a technician.
Is it safe to use my Bosch Washing Machine with error code E43? ▼
It depends on the cause. Most E43 errors mean the appliance has stopped itself as a safety measure. Check the 'Should I unplug it?' section above for specific guidance on this error.