Alpha
Alpha NTC Temperature Sensor 1.023435
NTC temperature sensor (thermistor) for Alpha gas boilers, manufacturer part number 1.023435.
At a glance
- Part type: NTC temperature sensor (thermistor)
- Also known as PRIMARY-NTC, 1258277
£23.14
£19.28 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 1.023435 is an NTC temperature sensor (thermistor) used in Alpha gas boilers. It provides temperature feedback to the boiler's control system so that heating and hot water output can be regulated accurately. It is listed under gas boiler spares in the thermistor category.
Signs this part needs replacing
- Boiler locks out or fails to fire, with a temperature-related fault code
- Inaccurate or erratic temperature readings from the boiler
- Heating or hot water output fluctuating when demand is steady
- Intermittent operation that clears after the boiler cools
- Resistance reading from the sensor outside the expected range for the temperature
Before you order
- Confirm your appliance model against the fit list above
- Check the part number on the existing sensor matches 1.023435
- Confirm whether your appliance is the LPG or natural gas variant
- Inspect the sensor connector and wiring for damage before fitting
Compliance
| Alternative numbers | PRIMARY-NTC, 1023435, 1258277 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| ALPHA CD115S | — | — | — | |
| ALPHA CD115S (LPG) | — | — | — | |
| ALPHA CD50S | — | — | — | |
| ALPHA CD50S (LPG) | — | — | — | |
| ALPHA CD70S | — | — | — | |
| ALPHA CD70S (LPG) | — | — | — | |
| ALPHA CD90S | — | — | — | |
| ALPHA CD90S (LPG) | — | — | — | |
| ALPHA COMMERCIAL PRO TEC 115 | — | — | — | |
| ALPHA COMMERCIAL PRO TEC 115 (LPG) | — | — | — |
Showing 10 of 40 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 COMMERCIAL appliance manual — PRO TEC 115, PRO TEC 115 (LPG), PRO TEC 50, PRO TEC 50 (LPG), PRO TEC 70, PRO TEC 70 (LPG), PRO TEC 90, PRO TEC 90 (LPG)
manualmanualALPHA COMMERCIAL appliance manual — PRO TEC PLUS 100, PRO TEC PLUS 100 (LPG), PRO TEC PLUS 115 (GC 41-532-36), PRO TEC PLUS 115 (LPG), PRO TEC PLUS 50 (GC 41-532-30), PRO TEC PLUS 50 (LPG), PRO TEC PLUS 60, PRO TEC PLUS 60 (LPG), PRO TEC PLUS 70 (GC 41-532-32), PRO TEC PLUS 70 (LPG), PRO TEC PLUS 75, PRO TEC PLUS 75 (LPG), PRO TEC PLUS 90 (GC 41-532-34), PRO TEC PLUS 90 (LPG)
manualmanualALPHA COMMERCIAL appliance manual — PROTEC 115NX, PROTEC 115NX LPG, PROTEC 150NX, PROTEC 150NX LPG, PROTEC 90NX, PROTEC 90NX LPG
manualmanualALPHA COMMERCIAL appliance manual — PROTEC 48NX, PROTEC 48NX LPG, PROTEC 68NX, PROTEC 68NX LPG
manualmanualALPHA appliance manual — CD115S, CD115S (LPG), CD90S, CD90S (LPG)
manualmanualALPHA appliance manual — CD50S, CD50S (LPG), CD70S, CD70S (LPG)
manualNo technical questions yet for this part.
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