Baxi
Baxi Wiring Harness 3 Way Valve Pump Fan 720774401
Baxi wiring harness (720774401) linking the 3-way valve, pump and fan on Neta-Tec Combi and Neta-Tec Plus Combi gas boilers.
At a glance
- Part type: Wiring harness
- Also known as 1119938
- This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
£64.80
£54.00 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 Baxi 720774401 is a wiring harness that carries the electrical connections between the 3-way valve, the circulating pump and the fan on Baxi Neta-Tec Combi appliances. It is the factory loom for that group of components, terminating in the plugs and connectors used on these boilers. Fitting the correct harness keeps the control sequence between diverter valve, pump and fan intact.
Signs this part needs replacing
- The fan fails to run or runs intermittently while the boiler calls for heat
- The 3-way valve does not move between heating and hot water positions
- The pump does not start when the boiler is switched on
- Intermittent lockouts or fault codes that clear when the loom is disturbed
- Visible damage to the harness: chafed insulation, heat-affected or corroded connector pins, or a plug that will not latch
Before you order
- Check the GC number and appliance serial plate against the compatibility list to confirm the harness suits your model
- Note the alternative part number 1119938 when cross-referencing older documentation
- Inspect the mating plugs on the 3-way valve, pump and fan for damage before fitting a replacement harness
- This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
Mechanical
| Part type | Cables, Leads & Wiring Harnesses |
|---|---|
| Length | 0.1mm |
| Width | 0.1mm |
| Depth | 0.1mm |
Compliance
| Manufacturer part number (MPN) | 720774401 |
|---|---|
| GC number | H90-622 |
| Barcode / EAN | 720774401 |
| Commodity code | 8544 42 00 00 |
| GPC classification | Household Boilers/Furnaces/Tank Water Heaters Replacement Parts/Accessories |
| Alternative numbers | 1119938 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| BAXI BAXI NETA-TEC COMBI 24 GA | — | — | — | |
| BAXI BAXI NETA-TEC COMBI 28 GA | — | — | — | |
| BAXI BAXI NETA-TEC COMBI 33 GA | — | — | — | |
| BAXI BAXI NETA-TEC PLUS COMBI 24 GA | — | — | — | |
| BAXI BAXI NETA-TEC PLUS COMBI 28 GA | — | — | — | |
| BAXI BAXI NETA-TEC PLUS COMBI 33 GA | — | — | — | |
| BAXI NETA-TEC COMBI 24 GA | 47-075-51 | 47-075-51 | — | — |
| BAXI NETA-TEC COMBI 28 GA | 47-075-52 | 47-075-52 | — | — |
| BAXI NETA-TEC COMBI 33 GA | 47-075-53 | 47-075-53 | — | — |
| BAXI NETA-TEC PLUS COMBI 24 GA | 47-075-64 | 47-075-64 | — | — |
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.
BAXI appliance manual — NETA-TEC COMBI 24 GA (GC 47-075-51), NETA-TEC COMBI 28 GA (GC 47-075-52), NETA-TEC COMBI 33 GA (GC 47-075-53)
manualmanualBAXI appliance manual — NETA-TEC PLUS COMBI 24 GA (GC 47-075-64), NETA-TEC PLUS COMBI 28 GA (GC 47-075-65), NETA-TEC PLUS COMBI 33 GA (GC 47-075-66)
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