Locking fault a/0/1 (8/2/8) - Digital water pressure sensor fault

What does a/0/1 mean?

The digital water pressure sensor is defective and generating a fault code. This will prevent both heating operation and domestic hot water. This is a locking fault, and the boiler will attempt to self-correct.

• Defective digital water pressure sensor

Click steps to track your progress.

1. 1

   Observe the system pressure gauge (if present) to see if pressure is stable and within normal limits.

2. 2

   Allow the boiler to attempt an automatic reset.

3. 3

   If the fault persists, contact a qualified service technician to inspect or replace the water pressure sensor.