Alpha
Alpha Control Knob DHW/CH 1.023544
Alpha 1.023544 control knob for adjusting DHW and CH settings on compatible Alpha gas boilers.
At a glance
- Part type: control knob / trimmer adjustment knob
- Also known as CONTROL-KNOB, TRIMMER-ADJUSTMENT-KNOB-252835C, 1257853
£4.84
£4.03 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 Alpha 1.023544 is a control knob (trimmer adjustment knob) used on Alpha gas boilers. It fits the trimmer adjustment spindle and is used to set the domestic hot water and central heating settings. It is listed under control knobs within Alpha gas boiler spares.
Signs this part needs replacing
- The knob turns freely without changing the DHW or CH setting
- Cracks, splits or missing sections in the knob body
- The knob has worked loose or come away from the spindle
- The knob is stiff, jammed or difficult to turn
- Markings on the knob are worn or no longer legible
Before you order
- Check your boiler model against the fit list above
- Confirm the existing knob matches the part number and spindle fitting
- Inspect the spindle for damage, as a worn spindle can produce the same symptoms as a failed knob
Compliance
| Alternative numbers | CONTROL-KNOB, TRIMMER-ADJUSTMENT-KNOB-252835C, 1257853 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| ALPHA ALPHA CD28C EXTRA | — | — | — | |
| ALPHA ALPHA CD28C EXTRA LPG | — | — | — | |
| ALPHA ALPHA CD35C | — | — | — | |
| ALPHA ALPHA CD35C LPG | — | — | — | |
| ALPHA ALPHA GASSAVER GS-1 | — | — | — | |
| ALPHA ALPHA PREMIERPACK | — | — | — | |
| ALPHA CD12S | 41-532-16 | 41-532-16 | — | — |
| ALPHA CD12S (LPG) | 41-532-17 | 41-532-17 | — | — |
| ALPHA CD20S | 41-532-18 | 41-532-18 | — | — |
| ALPHA CD20S (LPG) | 41-532-19 | 41-532-19 | — | — |
Showing 10 of 24 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.
ALPHA appliance manual — CD12S (GC 41-532-16), CD12S (LPG) (GC 41-532-17), CD20S (GC 41-532-18), CD20S (LPG) (GC 41-532-19), CD28S (GC 41-532-20), CD28S (LPG) (GC 41-532-21)
manualmanualALPHA appliance manual — CD25C (GC 47-532-31), CD25C (LPG) (GC 47-532-32), CD28C (GC 47-532-33), CD28C (LPG) (GC 47-532-34), CD28C EXTRA, CD28C EXTRA (LPG), CD35C (GC 47-532-35), CD35C (LPG) (GC 47-532-36)
manualmanualALPHA appliance manual — CD25X (GC 47-532-39), CD25X (LPG) (GC 47-532-40), CD28X (GC 47-532-37), CD28X (LPG) (GC 47-532-38)
manualNo technical questions yet for this part.
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Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.