Worcester Bosch A1: Pump running dry (A1 / 281)
May need an engineerWhat it means
The pump ran without water, often because pressure dropped to zero.
Safe things to try first
- Top the system up to 1.2 bar and reset.
When to call an engineer
If pressure keeps dropping there is a leak or expansion vessel fault.
Never remove the boiler cover or work on gas components yourself. It is illegal unless you are Gas Safe registered, and it will void your warranty.
Fix Worcester Bosch A1 today
Boiler repair from £75. 92% of repairs fixed on the first visit with parts from the van.