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Knob 40MM

Part number (MPN)
6230921
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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 6230921 fit?

The sources we checked list 6230921 (Knob 40MM, Sime) for: Sime Dewy 30/130 HE FS, Sime Dewy 30/130, Sime Dewy 30/50 HE Wm, Sime Dewy 30/80, Sime Planet Dewy 100 Bfr, Sime Planet Dewy 110 A, Sime Planet Dewy 60 Bfr, Sime Planet Dewy 90 A, Sime Planet Super 4 FS, Sime Planet Super 4 Wm 600Mm, Sime Planet Super 4 Wm 630Mm, Sime Super 105 Mk Ii, Sime Super 90 Mk Ii, Sime Superior 40 Ci, Sime Superior 50 Ci, Sime Superior 60 Ci, Sime Superior 80 Ci, Sime Superior Mkii 40, Sime Superior Mkii 50, Sime Superior Mkii 60, Sime Superior Mkii 75, Sime Superior Mkii 90. Always check the model and serial number on the data plate before ordering.

Does 6230921 have equivalent or superseded part numbers?

The sources we checked list no equivalents for 6230921. Ask a Sime stockist to confirm.

What should I check before fitting 6230921?

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.

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Some lists are dated and the part may have been superseded.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