Andrews
Andrews Heat Exchanger Kit 7700304
Heat exchanger kit for Andrews Fastflo WHI49 and LWHI49 water heaters.
At a glance
- Also known as 1822864
£1,222.57
£1,018.81 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 Andrews heat exchanger kit (part number 7700304) is a heat exchanger assembly for Andrews water heaters. It is used in the Fastflo WHI49 and LWHI49 models, where it transfers heat from the combustion side of the appliance to the domestic hot water supply. The kit is supplied by Andrews Water Heaters as a service component for these appliances.
Signs this part needs replacing
- Reduced hot water output or inconsistent temperatures
- Water leaking from the heat exchanger body or connections
- Kettling, banging or rumbling noises during heating
- Visible scale, corrosion or soot deposits on the heat exchanger
- Repeated overheating or lockout faults
Before you order
- Check the model number on your appliance data plate matches WHI49 or LWHI49
- Confirm the part number 7700304 against your appliance's parts list
- Inspect the existing heat exchanger for scale or damage to confirm the fault
- Check that the kit is the correct component for your specific Fastflo model
Compliance
| Alternative numbers | 1822864 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| ANDREWS WATER HEATERS ANDREWS HOT WATER SPARES | — | — | — | |
| ANDREWS WATER HEATERS FASTFLO LWHI49 | — | — | — | |
| ANDREWS WATER HEATERS FASTFLO WHI49 | — | — | — |
Documents & drawings
Everything we hold for this part. Where a document exists but we don't hold it, the technical team will source it from the manufacturer — usually the same working day.
No technical questions yet for this part.
Not sure which part?
Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.