Hamworthy
Hamworthy Differential Pressure Switch 533901394
Dungs GGW 3 A4 differential pressure switch set to 1.2 mbar, for Hamworthy modules with serial numbers from 5000 onwards.
At a glance
- Also known as 2062084
£327.96
£273.30 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 Dungs GGW 3 A4 is a differential pressure switch supplied by Hamworthy for use in its gas boilers, set to operate at 1.2 mbar. It monitors the pressure difference across the combustion air path and signals the control board when the required differential is achieved. This version is fitted to modules with serial numbers from 5000 onwards.
Signs this part needs replacing
- Boiler locks out or fails to fire on a call for heat
- Air pressure or fan fault code shown on the display
- Intermittent ignition or flame failure during startup
- Fan runs but the burner does not light
- Repeated lockouts that clear after a reset
Before you order
- Check the module serial number — this switch is specified for units from 5000 onwards
- Confirm the existing switch is marked Dungs GGW 3 A4 with a 1.2 mbar setting
- Verify the Hamworthy part number 533901394 against the appliance's parts list
Compliance
| Alternative numbers | 2062084 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| HAMWORTHY HAMWORTHY SPARE PARTS | — | — | — | |
| HAMWORTHY WESSEX 200HE HIGH EFFICICENCY FLOOR STANDING | — | — | — | |
| HAMWORTHY WESSEX 50HE HIGH EFFICICENCY FLOOR STANDING | — | — | — |
Documents & drawings
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