2971 B
FAULT CODE
Worcester Bosch
System Pressure Too Low (8000 Series)
Low Severity
DIY Check Possible
On 8000 Series boilers, code 2971 B indicates system pressure is below the minimum. The boiler needs venting and/or topping up.
Step-by-Step Fix Guide
-
Step 1
Vent/bleed all radiators
-
Step 2
Top up the system using the filling loop to 1.5 bar
-
Step 3
Reset the boiler
-
Step 4
If pressure drops again, check for leaks and contact a Gas Safe engineer
Gas Safe Reminder
Work on gas appliances must be carried out by a Gas Safe registered engineer. The steps above cover safe checks a homeowner can perform - any internal component replacement requires a qualified professional. If in doubt, always call an engineer.