Baxi · 600 Combi 2
A.02.06 boiler fault code
600 Combi 2
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What A.02.06 means
A.02.06 indicates low system water pressure.
Safe check
Follow the Baxi 600 Combi 2 filling instructions to repressurise the system; use the pressure target stated in the manufacturer guide.
When to contact an engineer
Pressure will not hold, falls again, or the code remains after the documented filling procedure; arrange a Gas Safe registered engineer.
Safety notice
A boiler fault code alone is not a gas or carbon-monoxide emergency. If you smell gas, a CO alarm sounds, anyone feels unwell, or there is an unsafe flame, leave and call 0800 111 999 from outside.
Source and provenance
- Baxi 600 Combi 2 Installation Manual · §11.2, Table 33, printed p. 73
installation manual
Official manufacturer PDF; revision not stated in the supplied citation
- Baxi 600 Combi 2 Quick Start Guide · PDF pp. 9–10
quick-start guide
Official manufacturer PDF; revision not stated in the supplied citation
- Baxi How to repressurise your boiler with digital pressure gauge
homeowner guide
Checked 30/09/2026; the online page publishes no revision
Renting? Report it to your landlord or housing provider first. They are responsible for gas safety and boiler repairs, and the repair should not cost you.
Did this fix it?
After: Repressurise the boiler