Ideal
Ideal Wiring Harness Isar 174278
Ideal Kit - Harness Wiring Isar, part 174278, a replacement wiring harness for Ideal Esprit 2 and Evo HE boilers and 18 models in total.
At a glance
- Part type: Wiring
- Also known as 1179942
£112.84
£94.03 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 Ideal Kit - Harness Wiring Isar is a replacement wiring harness for Ideal gas boilers. It carries the low-voltage control and sensing connections between the boiler's electrical components, so the control board, fan, sensors and safety devices can communicate and the appliance can run through its sequence correctly. The harness is supplied under Ideal part number 174278 and is listed against the Esprit 2 and Evo HE ranges.
Signs this part needs replacing
- The boiler locks out or fails to complete its ignition sequence with no obvious mechanical cause.
- Intermittent faults that appear and clear, often worse when the appliance is warm or when the case is disturbed.
- Error codes relating to fan, sensor or control communication that return after resetting.
- Visible damage to the loom: chafed or heat-hardened insulation, exposed conductors, or a burnt smell around the connector plugs.
- Loose, corroded or partially seated plugs at the board or component ends of the harness.
Before you order
- Confirm the model and GC number against the compatibility list, as the same appliance name can be built in several variants.
- Check the existing harness against part number 174278 and the alternative number 1179942 before ordering.
- Inspect the connector plugs and any seals or grommets disturbed during removal, and replace them if they are perished.
Mechanical
| Part type | Cables, Leads & Wiring Harnesses |
|---|---|
| Length | 0.1mm |
| Width | 0.1mm |
| Depth | 0.1mm |
Compliance
| Manufacturer part number (MPN) | 174278 |
|---|---|
| Barcode / EAN | 5022141742781 |
| Commodity code | 8544 42 90 00 |
| GPC classification | Household Boilers/Furnaces/Tank Water Heaters Replacement Parts/Accessories |
| Alternative numbers | 1179942 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| IDEAL ESPRIT 2 - 24 | 47-348-71 | 47-348-71 | — | — |
| IDEAL ESPRIT 2 - 30 | 47-348-72 | 47-348-72 | — | — |
| IDEAL ESPRIT 2 - 35 | 47-348-73 | 47-348-73 | — | — |
| IDEAL EVO HE C22/24 | 47-348-32 | 47-348-32 | — | — |
| IDEAL EVO HE C22/30 | 47-348-33 | 47-348-33 | — | — |
| IDEAL EVO HE C22/35 | 47-348-34 | 47-348-34 | — | — |
| IDEAL ICOS SYSTEM HE15 | 41-421-99 | 41-421-99 | — | — |
| IDEAL ICOS SYSTEM HE24 | 41-397-82 | 41-397-82 | — | — |
| IDEAL IDEAL : ISAR + PROGRAMMER HE24 | — | — | — | |
| IDEAL IDEAL : ISAR + PROGRAMMER HE30 | — | — | — |
Showing 10 of 18 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.
IDEAL appliance manual — ESPRIT 2 - 24 (GC 47-348-71), ESPRIT 2 - 30 (GC 47-348-72), ESPRIT 2 - 35 (GC 47-348-73)
manualmanualIDEAL appliance manual — EVO HE C22/24 (GC 47-348-32), EVO HE C22/30 (GC 47-348-33), EVO HE C22/35 (GC 47-348-34)
manualmanualIDEAL appliance manual — ICOS SYSTEM HE15 (GC 41-421-99)
manualmanualIDEAL appliance manual — ICOS SYSTEM HE24 (GC 41-397-82)
manualmanualIDEAL appliance manual — ISAR + PROGRAMMER HE24 (GC 47-348-43), ISAR + PROGRAMMER HE30 (GC 47-348-44), ISAR + PROGRAMMER HE35 (GC 47-348-45)
manualmanualIDEAL appliance manual — ISAR HE24 (GC 47-348-31), ISAR HE30 (GC 47-348-30), ISAR HE35 (GC 47-348-29)
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