Alpha
Alpha Wiring Assembly Fan NTC Flow Switch CD25/28/35C 3.018590
Wiring assembly for Alpha CD25C, CD28C and CD35C LPG boilers, connecting the fan, 24V transformer, NTC sensor, pressure switch and flow switch.
At a glance
- Also known as WIRING-ASSY-FAN-NTC-FLOW-SWI-CD252835C, 1258091
£130.66
£108.88 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
This is an Alpha wiring assembly, part number 3.018590, used across the CD25C, CD28C and CD35C LPG boiler range. It carries the cabling for the fan, the 24V transformer, the temperature sensor (NTC), the pressure switch and the flow switch. It forms the electrical link between these components and the boiler's control circuit.
Signs this part needs replacing
- The fan fails to run or runs intermittently despite a healthy fan unit
- NTC temperature readings become erratic or the boiler reports a sensor fault
- Flow switch faults appear when the wiring harness is disturbed or moved
- Pressure switch readings drop out or the boiler locks out on a pressure-related fault
- Visible damage to the cable, insulation, pins or connector housings
Before you order
- Confirm the boiler model and LPG variant against the fitment list
- Check the existing wiring assembly part number matches 3.018590
- Inspect the connector plugs and pins for corrosion, heat damage or looseness
- Verify the fault lies in the wiring rather than the fan, sensor, switch or transformer it connects
Compliance
| Alternative numbers | WIRING-ASSY-FAN-NTC-FLOW-SWI-CD252835C, 3018590, 1258091 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| ALPHA CD25C | 47-532-31 | 47-532-31 | — | — |
| ALPHA CD25C (LPG) | 47-532-32 | 47-532-32 | — | — |
| ALPHA CD28C | 47-532-33 | 47-532-33 | — | — |
| ALPHA CD28C (LPG) | 47-532-34 | 47-532-34 | — | — |
| ALPHA CD28C EXTRA | — | — | — | |
| ALPHA CD28C EXTRA (LPG) | — | — | — | |
| ALPHA CD35C | 47-532-35 | 47-532-35 | — | — |
| ALPHA CD35C (LPG) | 47-532-36 | 47-532-36 | — | — |
Documents & drawings
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