Hamworthy
Hamworthy Gas Inlet Pressure Switch 533901420
Hamworthy gas inlet pressure switch for Modumax 110 and Modumax 125C floor standing boilers.
At a glance
- Part type: gas inlet pressure switch
£218.81
£182.34 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
This is a gas inlet pressure switch supplied by Hamworthy for use in its boiler range. It monitors gas inlet pressure and forms part of the appliance's safety and control circuit. The part is listed under Hamworthy spare parts for the Modumax floor standing boiler family.
Signs this part needs replacing
- The boiler fails to fire or locks out despite an adequate gas supply at the meter.
- Intermittent ignition or repeated lockout cycles that clear on reset.
- The appliance will not run with the gas inlet pressure switch circuit open.
- Fault codes or diagnostic indications pointing to a gas pressure switch fault.
- Physical damage, contamination or sticking at the switch, or a suspected incorrect signal from the switch during service checks.
Before you order
- Confirm the boiler model and variant match the fitment list above.
- Check the existing switch part number against SKU 533901420 before ordering.
- Verify the fault is traced to the gas inlet pressure switch and not to gas supply, wiring or the control board.
- Gas-carrying components must be fitted and commissioned by a competent, registered gas engineer.
No specification data held for this part.
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| HAMWORTHY HAMWORTHY SPARE PARTS | — | — | — | |
| HAMWORTHY MODUMAX 110 FLOOR STANDING | — | — | — | |
| HAMWORTHY MODUMAX 125C FLOOR STANDING | — | — | — |
Documents & drawings
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No documents held for this part. The technical team will source them from the manufacturer — usually the same working day.
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