PartsByCodespare parts by code

Sit 845 Sigma

Part number (MPN)
6243820
Check compatibility

Type your appliance model: we compare it with the 30 appliances in our sources.

Catalogue numberChecked sources
Direct linkseBay and Amazon
Free to useNo sign-up

Parts for the same appliances

OEM Replacement Part & Compatibility Table

Brand
Guide price (£)
Not available: check the current price with the seller
Source
retailer parts list
checked 2026-11-05
Fitting notes

Work on gas appliances must be carried out by a Gas Safe registered engineer. Check the model and serial number on the boiler data plate. Source: a parts retailer's list, not the manufacturer's: confirm the part number on the data plate or with the manufacturer before ordering.

Compatible appliances

Always check the model and serial number on the data plate before ordering.

Frequently asked questions

Which appliances does 6243820 fit?

The sources we checked list 6243820 (Sit 845 Sigma, Sime) for: Sime Ecomfort 25 HE, Sime Ecomfort 25 HE System, ECOMFORT + 30 HE EV COMBI NG, Sime Ecomfort 30 HE, Sime Ecomfort 35 HE, Sime Ecomfort Plus 25 He-Ev, Sime Ecomfort Plus 25 He-Ev System, Sime Ecomfort Plus 25 HE, Sime Ecomfort Plus 25 HE System, Sime Ecomfort Plus 30 He-Ev, Sime Ecomfort Plus 30 HE, Sime Format 100 B, Sime Format 100 C, Sime Format 110 C, Sime Format 80 B, Sime Format 80 C, Sime Format System 24, Sime Format System 24 HE, Sime Format System 30, Sime Format System 30 HE, Sime Friendly Format 100E, Sime Friendly Format 80, Sime Friendly Format 80E, FRIENDLY FORMAT TECHNYL CBI NG, Sime Friendly Technyl Format 80, Sime Friendly Technyl Format 80E, Sime Murelle EV HE 12 T, Sime Murelle EV HE 35, Sime Super 105 Mk Ii, Sime Super 90 Mk Ii. Always check the model and serial number on the data plate before ordering.

Does 6243820 have equivalent or superseded part numbers?

The sources we checked list no equivalents for 6243820. Ask a Sime stockist to confirm.

What should I check before fitting 6243820?

Work on gas appliances must be carried out by a Gas Safe registered engineer. Check the model and serial number on the boiler data plate. Source: a parts retailer's list, not the manufacturer's: confirm the part number on the data plate or with the manufacturer before ordering.

View on eBay

Some lists are dated and the part may have been superseded. Information only, compatibility not guaranteed.