Worcester Bosch Greenstar CDi Classic Surrey

The Greenstar CDi Classic covers the 25CDi through to 40CDi range — a very common Worcester boiler in Surrey homes installed between 2010 and 2020. Still fully supported with parts, it is worth repairing in most cases. Our engineers cover all CDi variants across Surrey. Call 0800 999 1609.

CDi Classic Models

• 25CDi, 28CDi, 30CDi, 35CDi, 40CDi — combi boilers
• System CDi variants for unvented cylinder installations

CDi Classic Faults

• EA227 — Ignition failure — most common CDi fault
• E9 — Overheat — often a scaling issue in Surrey hard water areas
• 9C4 — Pressure loss — repressurise and investigate

Hard water in parts of Surrey can cause lime scale build up in CDi heat exchangers. We carry inhibitor and descaling chemicals on every van. Call 0800 999 1609.