Hamworthy
Hamworthy Air Pressure Switch 533901334
Air pressure switch for Hamworthy Purwell Variheat and Wessex floor-standing boilers, modified from 533901318.
At a glance
- Also known as 2062048
£176.05
£146.71 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 Hamworthy 533901334 is a Dungs LGW3A2 air pressure switch fitted to Purwell Variheat and Wessex floor-standing boilers built before July 2006. It is a modified version of 533901318. The switch monitors pressure in the combustion air path and signals the boiler control when airflow is proven, allowing the burner to fire and shutting the appliance down if the fan or flue path fails.
Signs this part needs replacing
- Boiler locks out or fails to ignite even though the fan runs
- Repeated lockouts on start-up that clear after a reset
- Boiler fires intermittently or drops out during a demand for heat
- Fault code or diagnostic message indicating an air pressure or fan proving fault
- No ignition sequence at all despite the fan operating
Before you order
- Confirm the part number on the existing switch matches 533901334
- Check the boiler model against the fit list above
- Confirm the appliance was manufactured before July 2006
- Check whether the boiler has already been updated from 533901318 to the modified switch
Compliance
| Alternative numbers | 2062048 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| HAMWORTHY HAMWORTHY SPARE PARTS | — | — | — | |
| HAMWORTHY PURWELL VARIHEAT PV105HE FLOOR STANDING | — | — | — | |
| HAMWORTHY PURWELL VARIHEAT PV110C FLOOR STANDING | — | — | — | |
| HAMWORTHY PURWELL VARIHEAT PV125HE FLOOR STANDING | — | — | — | |
| HAMWORTHY PURWELL VARIHEAT PV140C FLOOR STANDING | — | — | — | |
| HAMWORTHY PURWELL VARIHEAT PV180C FLOOR STANDING | — | — | — | |
| HAMWORTHY PURWELL VARIHEAT PV65HE FLOOR STANDING | — | — | — | |
| HAMWORTHY PURWELL VARIHEAT PV70C FLOOR STANDING | — | — | — | |
| HAMWORTHY PURWELL VARIHEAT PV85HE FLOOR STANDING | — | — | — | |
| HAMWORTHY PURWELL VARIHEAT PV95C FLOOR STANDING | — | — | — |
Showing 10 of 11 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.
HAMWORTHY appliance manual — PURWELL VARIHEAT PV105HE FLOOR STANDING, PURWELL VARIHEAT PV125HE FLOOR STANDING, PURWELL VARIHEAT PV65HE FLOOR STANDING, PURWELL VARIHEAT PV85HE FLOOR STANDING
manualmanualHAMWORTHY appliance manual — PURWELL VARIHEAT PV110C FLOOR STANDING, PURWELL VARIHEAT PV140C FLOOR STANDING, PURWELL VARIHEAT PV180C FLOOR STANDING, PURWELL VARIHEAT PV70C FLOOR STANDING, PURWELL VARIHEAT PV95C FLOOR STANDING
manualmanualHAMWORTHY appliance manual — WESSEX 100HE HIGH EFFICICENCY FLOOR STANDING
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