Baxi Temperature Sensor (NTC Thermistor) 5108265

Genuine Baxi OEM temperature sensor (NTC thermistor) used across popular Baxi Group appliances. This sensor monitors water temperature, feeding the reading to the boiler PCB for safe and efficient control.

• Manufacturer: Baxi
• Part type: NTC temperature sensor (thermistor)
• MPN: 5108265
• Replaces: 247394, 248068, 248655
• GTIN / EAN: 5039177648017
• Supplied with: Washer (on many supplier packs)

Compatible ranges & examples*

Used on a wide range of Baxi/Main/Potterton models (variant dependent). Common compatibles include:

• Baxi Combi: 80E, 80 Eco, 105E, 105HE; Combi Instant: 80E, 105E HE
• Baxi System: 35/60, 60/100
• Performa: 24, 28, 24i HE; Performa System: 12HE, 18HE, 24HE, 28HE (incl. Megaflo System IE LPG variants)
• Main System HE models; Potterton Performa equivalents

*Always check your boilers data plate/parts manual for MPN 5108265 before ordering.

What this part does

An NTC thermistor changes resistance with temperature. The PCB uses this signal to regulate burner output, protect components and maintain stable hot water and heating performance.

When to replace

• Erratic temperatures or overheat/lockout faults traced to sensing
• Out-of-range resistance readings on test
• Physical damage or wiring/connector failure

What’s in the box

• 1 Baxi temperature sensor 5108265 (NTC thermistor)
• Washer (where included by supplier)

Installation & safety

Must be installed by a qualified Gas Safe engineer. After fitting, clear fault codes, verify resistance vs. temperature, and confirm safe operation.