Sime
Sime Combustion Chamber Rear Insulation 6139721
Rear combustion chamber insulation for Sime gas boilers, part number 6139721.
At a glance
- Also known as 2040490
£9.82
£8.18 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 Sime 6139721 is a rear insulation panel for the combustion chamber of Sime gas boilers. It is fitted at the rear of the combustion chamber to reduce heat loss and protect surrounding components from high temperatures. This insulation is used across a range of Sime boiler models, including the Format, Friendly Format, Metro, Planet and Open series.
Signs this part needs replacing
- Visible cracks, crumbling or deterioration of the insulation material
- Discolouration or scorch marks indicating heat damage
- Boiler overheating or short-cycling due to heat loss
- Increased noise from the combustion chamber
- Reduced boiler efficiency
Before you order
- Check your boiler model against the fitment list above
- Confirm the part number 6139721 matches your requirement
- Ensure the insulation is for the rear of the combustion chamber
- Consult the manufacturer's parts list if unsure
Compliance
| Alternative numbers | 2040490 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| SIME FORMAT 20 BF CE IONO MET - 8092950 | — | — | — | |
| SIME FORMAT 20 CE IONO MET - 8092900 | — | — | — | |
| SIME FORMAT 25 OF C MET - 8092923 | — | — | — | |
| SIME FORMAT 25 OF GPL - 8092918 | — | — | — | |
| SIME FORMAT 25 OF MET - 8092906 | — | — | — | |
| SIME FORMAT 25BF GPL - 8092970 | — | — | — | |
| SIME FORMAT 25BF MET - 8092969 | — | — | — | |
| SIME FORMAT 25BF TS GPL - 8092981 | — | — | — | |
| SIME FORMAT 25BF TS MET - 8092980 | — | — | — | |
| SIME FRIENDLY FORMAT 80 TECHNYL - 8092974 | 47-719-20 | 47-719-20 | — | — |
Showing 10 of 33 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.
SIME appliance manual — FRIENDLY FORMAT 80 TECHNYL - 8092974 (GC 47-719-20), FRIENDLY FORMAT 80 - 8092956 (GC 47-719-07), FRIENDLY FORMAT 80E TECHNYL - 8092973 (GC 47-719-19), FRIENDLY FORMAT 80E - 8092955 (GC 47-719-08)
manualmanualSIME appliance manual — SUPER 90 MKII - 8093560 (GC 47-719-14)
manualNo 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.