Worcester Bosch 3.1 Fault Code

Also written as 31 — same fault.

The Worcester Bosch 3.1 fault code means: your boiler is struggling to accurately read the outdoor temperature, which may cause your heating system to run inefficiently or at the wrong temperature.. It appears on 1 Worcester Bosch model in our database.

Technical description: Measured Values, Outside Temperature Sensor AF: – 20 °C = 2392 W/2.64 V, – 16 °C = 2088 W/2.49 V, – 12 °C = 1811 W/2.33 V, – 8 °C = 1562 W/2.16 V, – 4 °C = 1342 W/1.99 V, 0 °C = 1149 W/1.82 V, 4 °C = 984 W/1.65 V, 8 °C = 842 W/1.49 V, 12 °C = 720 W/1.34 V, 16 °C = 616 W/1.20 V, 20 °C = 528 W/1.07 V, 24 °C = 454 W/0.95 V