Description

Baxi Boiler Alternative DHW NTC Sensor Replacement

The Baxi DHW NTC Sensor 720777001 helps your boiler monitor domestic hot water temperature accurately, so it can deliver steady and reliable hot water. However, when the sensor becomes faulty, the boiler may show incorrect readings, unstable temperatures, or poor hot water performance. Therefore, replacing it with a brand new sensor helps restore proper temperature control and supports smooth daily operation.

Compatible Boilers

This part is compatible with the following models:

124 / 128 Series

• 124 Combi – GC No. 47-077-25
• 128 Combi – GC No. 47-077-26

Combi Compact Series

• 28 Compact – GC No. 47-075-72

EcoBlue Combi Series

• 24 – GC No. 47-075-81
• 28 – GC No. 47-075-82
• 33 – GC No. 47-075-83

Plus Combi Series

• 24 – GC No. 47-075-84
• 28 – GC No. 47-075-85
• 33 – GC No. 47-075-86

EcoBlue ERP Series

• 24 Combi – GC No. 47-077-11
• 28 Combi – GC No. 47-077-12
• 33 Combi – GC No. 47-077-13

Plus Combi ERP Series

• 24 – GC No. 47-077-08
• 28 – GC No. 47-077-09
• 33 – GC No. 47-077-10

Neta-Tec Series

• 24 GA – GC No. 47-075-51
• 28 GA – GC No. 47-075-52
• 33 GA – GC No. 47-075-53

Neta-Tec Plus Combi Series

• 24GA – GC No. 47-075-64
• 28GA – GC No. 47-075-65
• 33 GA – GC No. 47-075-66

Why Choose This Product?

This brand new Baxi DHW NTC sensor offers a simple and reliable way to restore accurate hot water temperature readings. In addition, it helps improve boiler performance without replacing larger components, so it is a practical and cost-effective repair option.

Delivery and Return

Order before 1 PM for same-day dispatch with standard and next-day delivery options available. Returns are accepted within 30 days if the part is unused and in its original packaging. Always use a qualified engineer for safe installation and correct fitment.

Frequently Asked Questions

1. What does a DHW NTC sensor do?
The DHW NTC sensor measures the domestic hot water temperature inside the boiler. It then sends that reading to the boiler controls, so the system can manage hot water correctly.

2. What happens if the DHW NTC sensor fails?
A faulty sensor can cause incorrect temperature readings and unstable hot water performance. As a result, you may notice water that runs too hot, too cold, or changes temperature unexpectedly.

3. Is this part brand new?
Yes, this listing is for a brand new Baxi DHW NTC sensor. Therefore, it is suitable when you want a fresh replacement part rather than a refurbished one.

4. How do I confirm compatibility?
Check part number 720777001 against the sensor already fitted in your boiler. You should also confirm the boiler model and revision before ordering to avoid the wrong fit.

5. Who should install this sensor?
A qualified heating engineer should install the part to ensure safe and correct fitting. This also helps protect the boiler and supports reliable system performance after replacement.