Baxi
Baxi DHW 12 Plate Heat Exchanger Assembly 7812527
Baxi 7812527 DHW 12 plate heat exchanger assembly for the 424 Combi 2 range, transferring heat from primary water to domestic hot water.
At a glance
- Appliance family: Baxi 424 Combi 2
- Also known as 1794946
£75.44
£62.87 ex. VAT · VAT at 20%
Same-day dispatch
Ordered by 4pm Mon–Fri, 10:30am Sat.
30-day returns
Unused, in original packaging.
What it is
The Baxi 7812527 is a domestic hot water (DHW) plate heat exchanger assembly with a 12-plate stack. It is fitted to appliances in the Baxi 424 Combi 2 family, where it transfers heat from the primary circuit to the domestic hot water supply. The assembly is supplied as a complete unit for direct fitting to the appliance.
Signs this part needs replacing
- Domestic hot water runs hot then cold, or fails to reach temperature, while the heating circuit works normally
- Reduced hot water flow rate at the taps compared with previous performance
- Scale or debris blocking the plate channels, causing poor heat transfer
- Leaks or weeping from the plate pack or its connections
- Cold inlet and hot outlet temperatures remaining close together, indicating a blocked or failed exchanger
Before you order
- Confirm the appliance model is one of the 424 Combi 2 variants listed above
- Check the existing plate count and part number on the fitted component
- Inspect the primary circuit for debris or sludge, as contamination can block a new exchanger
- Verify the fault is with the exchanger rather than the diverter valve or a sensor before ordering
Compliance
| Alternative numbers | 1794946 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| BAXI 424 COMBI 2 | 47-077-51 | 47-077-51 | — | — |
| BAXI 424 COMBI 2 LPG | 47-077-53 | 47-077-53 | — | — |
| BAXI 424 LPG COMBI 2 | 47-077-53 | 47-077-53 | — | — |
Documents & drawings
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