Main
Main Heat Exchanger Kit 7777495
Heat exchanger kit for Main and Potterton gas boilers, including the Main ECO Elite and Potterton Apollo ranges.
At a glance
- Part type: heat exchanger kit
- Also known as 1147778
£715.73
£596.44 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 heat exchanger kit is a Main boiler component supplied for the Main ECO and ECO Elite appliance families, and is also listed for Potterton Apollo models. The heat exchanger transfers heat from the combustion gases to the domestic heating water circuit. It is supplied as a kit for installation in the compatible appliances listed below.
Signs this part needs replacing
- Reduced or fluctuating domestic hot water temperature
- Boiler locking out or failing to reach temperature
- Visible leaks or weeping around the heat exchanger body
- Kettling, banging or gurgling noises from the boiler
- Discoloured water or debris indicating internal corrosion
Before you order
- Confirm your appliance model and GC number against the manufacturer's parts list
- Check the existing heat exchanger for scale, sludge or physical damage before ordering
- Verify that the kit contents match what is required for your appliance
- Confirm whether the boiler is a combi or system variant, as fitment differs across the range
Compliance
| Alternative numbers | 1147778 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| MAIN MAIN 24 ECO ELITE SYSTEM | — | — | — | |
| MAIN MAIN 24 ECO SYSTEM | — | — | — | |
| MAIN MAIN 25ECO ELITE | — | — | — | |
| MAIN MAIN 28ECO SYSTEM | — | — | — | |
| MAIN MAIN 28HE ECO ELITE SYSTEM | — | — | — | |
| MAIN MAIN 30ECO ELITE | — | — | — | |
| MAIN MAIN ECO 25HE | — | — | — | |
| MAIN MAIN ECO 30HE | — | — | — | |
| MAIN MAIN ECO ELITE 24 SYSTEM ErP | — | — | — | |
| MAIN MAIN ECO ELITE 25 COMBI ErP | — | — | — |
Showing 10 of 14 compatible appliances.
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 documents held for this part. The technical team will source them from the manufacturer — usually the same working day.
No technical questions yet for this part.
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