Baxi
Baxi 816/Main Eco Compact combustion control unit 7786381
Genuine Baxi combustion control unit, part number 7786381, for Baxi 816 Heat Only and Main Eco Compact 15 Heat boilers.
At a glance
- Part type: Combustion control unit
- Also known as 1119939
- Have the work carried out by a Gas Safe registered engineer
Showing prices
£399.11
£332.59 ex. VAT · VAT at 20%
Available to order · 7 working days
Available to order · 7 working days
Not certain it's the right part? The technical team verifies fitment before dispatch — no charge, and it stops a second trip.Call the technical teamSend a technical question
Same-day dispatch
Ordered by 4pm Mon–Fri, 10:30am Sat.
30-day returns
Unused, in original packaging.
What it is
This is Baxi's combustion control unit, part number 7786381, combining the gas valve, fan and control functions used to regulate combustion on the appliance.
Signs this part needs replacing
- Boiler fails to ignite or locks out on a combustion-related fault
- Burner will not modulate correctly
- Gas smell near the unit
- Fan or valve failing to respond to the boiler's controls
Before you order
- Confirm the part number printed on your existing unit matches 7786381
- Check your exact boiler model and GC number against the fitment list above
- Isolate the gas and electrical supply before removing the old unit
- Test for gas soundness after fitting
- Have the work carried out by a Gas Safe registered engineer
Compliance
| Alternative numbers | 1119939 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| BAXI ASSURE HEAT 16 | 41-470-81 | 41-470-81 | — | — |
| BAXI MAINECO COMPACT HEAT 15 | 41-884-18 | 41-884-18 | — | — |
| BAXI MAINECO COMPACT HEAT 18 | 41-884-19 | 41-884-19 | — | — |
| BAXI MAINECO COMPACT HEAT 24 | 41-884-20 | 41-884-20 | — | — |
Fitment listings are a guide, not a guarantee. Plant-room assemblies get modified on site more often than not. Send us the GC number off the data badge and a photo of the existing valve and we will confirm before anything is dispatched.
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.