Ideal
Ideal Thermistor Boiler Control 174790
Ideal 174790 thermistor boiler control sensor for Esprit and Esprit 2 appliances, with alternative part numbers 1780092 and N3187.
At a glance
- Part type: Sensor / thermistor
- Appliance family: Ideal Esprit, Ideal Esprit 2
- Also known as 1780092, N3187
£15.72
£13.10 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 174790 is a thermistor boiler control sensor manufactured by Ideal Heating. It is a temperature-sensing component used within the boiler's control circuit, feeding temperature information back to the appliance so that firing, modulation and safety responses are managed correctly. It is listed against the Ideal Esprit and Esprit 2 ranges.
Signs this part needs replacing
- Boiler fails to fire or locks out intermittently with no obvious mechanical cause
- Domestic hot water runs hot and cold, or the temperature swings without the tap being adjusted
- Central heating flow temperature reads incorrectly on the display, or the boiler short-cycles
- Fault codes relating to temperature sensing or flow/return temperature appear on the control panel
- Resistance readings taken across the sensor fall outside the expected range for the appliance
Before you order
- Confirm the appliance GC number against the compatibility list, as the same model name can appear across several build variants
- Check the existing sensor against the alternative numbers 1780092 and N3187 before removing it
- Inspect the sensor pocket and any sealing washer or O-ring at the same time, as these are often disturbed during removal
- Isolate the appliance and follow the manufacturer's wiring and resistance test procedure before fitting
Mechanical
| Part type | Sensor |
|---|---|
| Appliance family | Ideal Esprit, Ideal Esprit 2 |
Compliance
| Manufacturer part number (MPN) | 174790 |
|---|---|
| Barcode / EAN | 5022141747908 |
| Commodity code | 8533 40 10 00 |
| GPC classification | Household Boilers/Furnaces/Tank Water Heaters Replacement Parts/Accessories |
| Alternative numbers | 1780092, N3187 |
| 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 ESPRIT HE24 | 47-348-46 | 47-348-46 | — | — |
| IDEAL ESPRIT HE30 | 47-348-47 | 47-348-47 | — | — |
| IDEAL ESPRIT HE35 | 47-348-48 | 47-348-48 | — | — |
| 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 IDEAL : ISAR + PROGRAMMER HE24 | — | — | — |
Showing 10 of 19 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 — ESPRIT HE24 (GC 47-348-46), ESPRIT HE30 (GC 47-348-47), ESPRIT HE35 (GC 47-348-48)
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 — 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)
manualNo technical questions yet for this part.
Not sure which part?
Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.