Baxi Domestic Hot Water NTC Sensor 5114725

Genuine Baxi OEM DHW temperature sensor (NTC thermistor) used across best-selling Baxi/Main/Potterton boilers. The sensor monitors hot-water temperature and reports to the PCB for safe, stable control.

• Manufacturer: Baxi
• Part type: NTC temperature sensor DHW
• MPN: 5114725
• GTIN / EAN: 5039177659990
• Typical pack: Sensor; some suppliers include a washer/gasket (check your pack)

Compatible ranges & examples*

Used widely across Baxi Group appliances (model/year dependent). Common compatibles include:

• Baxi: Duo-tec / Duo-tec ErP (e.g. 24HE/28HE/33HE/40HE); Megaflo / Megaflo ErP (System); Platinum / Gold; Promax; Titanium
• Main: Eco / Eco Elite (incl. ErP)
• Potterton: Titanium HE family

*Always confirm against your boilers data plate/parts list for MPN 5114725 before ordering.

What this part does

An NTC thermistor changes resistance with temperature. The boilers PCB uses this signal to regulate burner output, delivering consistent hot water while protecting components.

When to replace

• Intermittent or unstable DHW temperature
• Overheat/lockout faults traced to sensing
• Out-of-range resistance readings or physical damage

What’s in the box

• 1 Baxi DHW NTC sensor 5114725
• Washer/gasket (only if included by supplier)

Installation & safety

Must be fitted by a qualified Gas Safe engineer. After installation, verify resistance vs. temperature and confirm stable DHW performance.