Alpha
Alpha Flow Switch 3.013211
At a glance
- Part type: Flow switch
- Appliance family: CB and CD series combination boilers
- Also known as 1250606
£45.34
£37.78 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 flow switch, part number 3.013211, is a water-side sensing component fitted to Alpha CB and CD series combination boilers. It sits in the domestic hot water circuit and detects when a hot water tap is opened, sending a signal to the boiler control board so the burner and pump start. Without a reliable signal, the boiler has no way of knowing that hot water has been demanded.
Signs this part needs replacing
- No hot water production while the central heating continues to run normally.
- The boiler fails to fire when a hot water tap is opened, with no burner ignition on DHW demand.
- Hot water runs intermittently, cutting in and out as the switch signal drops.
- The control board does not register a hot water demand, so the pump and fan stay idle.
- Repeated lockouts or fault indications that appear only when hot water is drawn.
Before you order
- Check the GC number on the appliance data badge against the compatibility list to confirm the correct variant.
- Confirm the flow switch currently fitted carries part number 3.013211 or the alternative number 1250606.
- Isolate the water supply and electrical supply before removing the switch, as it sits within the domestic hot water circuit.
Mechanical
| Part type | Flow switch |
|---|---|
| Appliance family | CB and CD series combination boilers |
Compliance
| Manufacturer part number (MPN) | 3.013211 |
|---|---|
| GC number | E57-751 |
| Barcode / EAN | 8015065352065 |
| Commodity code | 8403 90 00 00 |
| Alternative numbers | 7625854036383, ALPHA3.013211, ALPHA3.013211, ALPHA3.013211, 1250606 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| ALPHA ALPHA CB24 | — | — | — | |
| ALPHA ALPHA CB24X | — | — | — | |
| ALPHA ALPHA CB28 | — | — | — | |
| ALPHA ALPHA CB28X | — | — | — | |
| ALPHA ALPHA CD24C | — | — | — | |
| ALPHA ALPHA CD32C | — | — | — | |
| ALPHA ALPHA HE CB25 | — | — | — | |
| ALPHA ALPHA HE CB33 | — | — | — | |
| ALPHA CB24 | 47-532-15 | 47-532-15 | — | — |
| ALPHA CB24 (LPG) | — | — | — |
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 — CB24 (GC 47-532-15), CB24 (LPG), CB24X (GC 47-532-14), CB24X (LPG), CB28 (GC 47-532-16), CB28 (LPG), CB28X (GC 47-532-17), CB28X (LPG)
manualmanualALPHA appliance manual — CD24C (GC 47-532-19), CD24C (LPG) (GC 47-532-29), CD32C (GC 47-532-21), CD32C (LPG) (GC 47-532-30)
manualmanualALPHA appliance manual — HE CB25 (GC 47-532-25), HE CB25 (LPG) (GC 47-532-27), HE CB33 (GC 47-532-26), HE CB33 (LPG) (GC 47-532-44)
manualNo technical questions yet for this part.
Not sure which part?
Tell the parts assistant what it's going into — the appliance make and model, or the GC number off the data badge — and it will check this part is on the fit list.