Worcester Bosch
Worcester Bosch Control Unit HT3 GSHF Combi 8716117678
Control unit for Worcester Greenstar Highflow 440CDi and 550CDi ErP combi boilers, managing ignition, modulation and safety monitoring.
At a glance
- Appliance family: Greenstar Highflow combi
- Also known as 2244695
£620.72
£517.27 ex. VAT · VAT at 20%
Same-day dispatch
Ordered by 4pm Mon–Fri, 10:30am Sat.
30-day returns
Unused, in original packaging.
What it is
The Worcester Bosch 8716117678 is a control unit (printed circuit board) for Greenstar Highflow combi boilers. It manages the boiler's operating sequence, including ignition, modulation and safety monitoring. This unit is specific to the HT3 GSHF combi platform.
Signs this part needs replacing
- Boiler does not respond to heating or hot water demand
- Blank or unlit display on the control panel
- Persistent fault codes relating to the control board
- Intermittent boiler operation or unexpected lockouts
- No ignition sequence when demand is present
Before you order
- Confirm the boiler model and GC number against the list above
- Check the existing control unit for the part number 8716117678
- Identify whether the boiler is NG or LPG, as fitment differs
Compliance
| GC number | J25-465 |
|---|---|
| Alternative numbers | 2244695 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| WORCESTER GREENSTAR HIGHFLOW 440CDi ErP LPG (7731600099) | 47-406-90 | 47-406-90 | — | — |
| WORCESTER GREENSTAR HIGHFLOW 440CDi ErP LPG (7738100590) | 47-406-86 | 47-406-86 | — | — |
| WORCESTER GREENSTAR HIGHFLOW 440CDi ErP NG (7731600098) | 47-406-89 | 47-406-89 | — | — |
| WORCESTER GREENSTAR HIGHFLOW 440CDi ErP NG (7738100589) | 47-406-85 | 47-406-85 | — | — |
| WORCESTER GREENSTAR HIGHFLOW 550CDi ErP LPG (7731600101) | 47-406-92 | 47-406-92 | — | — |
| WORCESTER GREENSTAR HIGHFLOW 550CDi ErP LPG (7738100592) | 47-406-88 | 47-406-88 | — | — |
| WORCESTER GREENSTAR HIGHFLOW 550CDi ErP NG (7731600100) | 47-406-91 | 47-406-91 | — | — |
| WORCESTER GREENSTAR HIGHFLOW 550CDi ErP NG (7738100591) | 47-406-87 | 47-406-87 | — | — |
| WORCESTER WORCESTER GREENSTAR HIGHFLOW 440CDi ErP LPG | — | — | — | |
| WORCESTER WORCESTER GREENSTAR HIGHFLOW 440CDi ErP NG | — | — | — |
Showing 10 of 12 compatible appliances.
Documents & drawings
Everything we hold for this part. Where a document exists but we don't hold it, the technical team will source it from the manufacturer — usually the same working day.
WORCESTER appliance manual — GREENSTAR HIGHFLOW 440CDi ErP LPG (7731600099) (GC 47-406-90), GREENSTAR HIGHFLOW 440CDi ErP NG (7731600098) (GC 47-406-89), GREENSTAR HIGHFLOW 550CDi ErP LPG (7731600101) (GC 47-406-92), GREENSTAR HIGHFLOW 550CDi ErP NG (7731600100) (GC 47-406-91)
manualmanualWORCESTER appliance manual — GREENSTAR HIGHFLOW 440CDi ErP LPG (7738100590) (GC 47-406-86), GREENSTAR HIGHFLOW 440CDi ErP NG (7738100589) (GC 47-406-85), GREENSTAR HIGHFLOW 550CDi ErP LPG (7738100592) (GC 47-406-88), GREENSTAR HIGHFLOW 550CDi ErP NG (7738100591) (GC 47-406-87)
manualNo technical questions yet for this part.
Not sure which part?
Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.