Baxi Combi 105E Boiler 16 Plate DHW Heat Exchanger

The Baxi combi 105e 16 plate heat exchanger 248048 now use 7225723 part number is a high-quality compatible replacement part designed to transfer heat from the boiler’s primary circuit to the domestic hot water supply. As a result, it helps deliver consistent and efficient hot water performance in supported Baxi combi boilers.

However, when the exchanger becomes blocked or worn, it can cause fluctuating temperatures, reduced flow, or no hot water at all. Therefore, replacing the correct 16 plate unit restores smooth operation, improves efficiency, and ensures reliable day-to-day hot water performance.

Compatibility :

• Baxi 105 HE A Instant
• Baxi Combi 105E, 105HE

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 combi 105e 16 plate heat exchanger do?
The heat exchanger transfers heat from the boiler’s primary circuit to your domestic hot water supply. As a result, it allows your combi boiler to deliver instant hot water at your taps without storing it.

2. What are the signs of a faulty plate heat exchanger?
Common signs include fluctuating hot water temperature, reduced water pressure, lukewarm water, or no hot water at all. In some cases, you may also notice limescale buildup or internal blockage affecting performance.

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

4. Does the number of plates matter?
Yes, it matters a lot. The number of plates affects heat transfer and flow rate. Therefore, you must use a 16 plate heat exchanger for these models, as using a different size may cause performance issues or improper fitting.

5. How often should a plate heat exchanger be replaced?
There’s no fixed interval, but its lifespan depends on water quality and usage. However, regular boiler servicing and using a scale reducer can help extend its life and maintain consistent performance.