Fault 41 Code 104 — Temperature sensor T2 faulty, break in sensor lead

What does Fault 41 104 mean?

The Worcester Bosch Greenstar CDi Boiler displays Fault 41 with code 104, indicating a break in the sensor lead for temperature sensor T2, located at the bottom of the solar cylinder.

• Break or interruption in the sensor lead (T2)
• Loose or disconnected wiring for sensor T2
• Faulty temperature sensor T2

Click steps to track your progress.

1. 1

   Visually inspect the entire length of the sensor lead for T2 for any breaks, cuts, or disconnections.

2. 2

   Ensure the lead is securely connected at both ends.

3. 3

   If a break is found or the fault persists, contact a qualified heating engineer to check and replace temperature sensor T2 if necessary.