Baxi Boiler 14 Plate Heat Exchanger Replacement 720790001

The Baxi 14 plate heat exchanger replacement 720790001 is designed to transfer heat from the boiler’s primary circuit to the domestic hot water supply in selected Baxi combi boilers. As a result, it helps maintain reliable hot water performance and efficient everyday operation. However, if the exchanger becomes blocked, scaled, or worn, it can cause poor flow or fluctuating temperatures. Therefore, replacing it helps restore smooth and consistent hot water delivery.

Compatibility :

• Combi: 24, 28
• Duo Tec 2 GA Range: 24, 28
• Ecoblue Advance Combi: 24, 28, 33
• Advance Combi ErP: 24, 28, 33
• Platinum 2 Combi GA: 28, 33, 40

Important fitting advice

We recommend that all parts are fitted by a fully qualified Gas Safe registered engineer. If you need help confirming the right part, contact us our team has 10+ years of boiler spares knowledge and friendly chat support to help you quickly.

Delivery

At Boiler Spares Hub, we dispatch orders within 1 working day (Monday-Friday). Orders placed outside working days will be dispatched on the next working day. For delivery options available for this product, please add it to your basket or check our delivery options page.

Returns

We accept 30-day returns. Returns must be in an unopened, sealed box. If we find the item has been used or installation was attempted, we may refuse the return.

Frequently Asked Questions (FAQs)

1. What does the Baxi plate heat exchanger do?
The plate heat exchanger transfers heat from the boiler’s primary circuit to the domestic hot water supply. As a result, it allows the boiler to provide hot water efficiently to taps and showers.

2. What are the signs of a faulty plate heat exchanger?
Common signs include fluctuating hot water temperature, poor hot water flow, lukewarm water, or no hot water at all. In some cases, internal scaling or blockage can also affect performance.

3. Can a plate heat exchanger be cleaned instead of replaced?
In some cases, a blocked heat exchanger can be cleaned using a suitable descaling process. However, if it is leaking, heavily scaled, or damaged, replacement is usually the more reliable long-term option.

4. Why is the correct part number important?
Using the correct manufacturer part number helps ensure the heat exchanger fits properly and performs as intended. Therefore, checking part number 720790001 before purchase is recommended.

5. Which boilers does this heat exchanger fit?
This part fits selected Baxi Combi, Duo Tec 2, Ecoblue Advance, Advance Combi ERP, and Platinum 2 models. Checking the GC number and appliance model before ordering is always advised.