Instant electric water heater fault analysis:
1. The key switch is damaged.
2, touch button touch sensitivity is too low.
solution
1. Open the top cover of the water heater, remove the display board, and replace the key switch with the same specification.
2. Open the top cover of the water heater, remove the display board, check whether the touch key and other components on the display board are welded off, or replace the display board with the corresponding specifications.
If it doesn't work out, you can only find a professional master to repair it.