Vokera
Vokera Stepper Actuator And Cartridge 20123997
Stepper actuator and cartridge assembly for Vokera Evolve and Unica MAX combi boilers.
At a glance
- Also known as 1534338
£54.23
£45.19 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 Vokera Stepper Actuator And Cartridge is a combined actuator and cartridge assembly used on Vokera Evolve and Unica MAX combi boilers. The stepper actuator drives the cartridge to modulate flow through the domestic hot water circuit, allowing the boiler to control hot water delivery. It is supplied under Vokera part number 20123997.
Signs this part needs replacing
- Domestic hot water temperature fluctuates or runs hot and cold
- Hot water demand is not recognised, so the boiler does not fire for DHW
- Water flow through the DHW circuit is restricted or inconsistent
- The actuator head does not move or respond when hot water is drawn
- Visible damage, stiffness or leakage around the cartridge body
Before you order
- Confirm the boiler model and boiler code against the fitment list above
- Check the appliance's own data plate rather than relying on the casing label alone
- Inspect the actuator wiring and connector before condemning the assembly
- Verify the fault is at the actuator and cartridge rather than elsewhere in the DHW circuit
Compliance
| Alternative numbers | 1534338 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| VOKERA EVOLVE 24C (BOILER CODE 20127447) | 47-364-37 | 47-364-37 | — | — |
| VOKERA EVOLVE 28C (BOILER CODE 20119409) | 47-364-38 | 47-364-38 | — | — |
| VOKERA EVOLVE 32C (BOILER CODE 20131015) | 47-364-39 | 47-364-39 | — | — |
| VOKERA EVOLVE 36C (BOILER CODE 20131016) | 47-364-40 | 47-364-40 | — | — |
| VOKERA EVOLVE 42C (BOILER CODE 20131017) | 47-364-41 | 47-364-41 | — | — |
| VOKERA UNICA MAX 35C | 47-364-61 | 47-364-61 | — | — |
| VOKERA UNICA MAX 35C LPG | 47-364-63 | 47-364-63 | — | — |
| VOKERA UNICA MAX 40C | 47-364-62 | 47-364-62 | — | — |
| VOKERA UNICA MAX 40C LPG | 47-364-64 | 47-364-64 | — | — |
| VOKERA VOKERA EVOLVE 24C | — | — | — |
Showing 10 of 14 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.
VOKERA appliance manual — EVOLVE 24C (BOILER CODE 20127447) (GC 47-364-37), EVOLVE 28C (BOILER CODE 20119409) (GC 47-364-38), EVOLVE 32C (BOILER CODE 20131015) (GC 47-364-39), EVOLVE 36C (BOILER CODE 20131016) (GC 47-364-40)
manualmanualVOKERA appliance manual — UNICA MAX 35C (GC 47-364-61), UNICA MAX 35C LPG (GC 47-364-63), UNICA MAX 40C (GC 47-364-62), UNICA MAX 40C LPG (GC 47-364-64)
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