Hamworthy
Hamworthy Differential Pressure Switch 573407177
Differential pressure switch for Hamworthy Milborne 501 and 502 wall hung condensing boilers, part number 573407177.
At a glance
- Also known as 2064434
£260.83
£217.36 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 573407177 is a differential pressure switch used in Hamworthy gas boilers. It monitors the pressure difference across the fan and flue system and signals the boiler control board that air pressure has been proved. It is listed for the Milborne wall hung condensing range.
Signs this part needs replacing
- Boiler locks out or fails to fire on a call for heat
- Fan runs but the boiler does not prove air pressure and will not ignite
- Intermittent lockouts that clear on reset but return
- Fault codes relating to air pressure or fan proving
- Boiler shuts down shortly after ignition
Before you order
- Confirm the boiler is a Hamworthy Milborne 501 or 502 wall hung condensing model
- Check the existing switch is marked with part number 573407177
- Confirm the fault is traced to the pressure switch rather than the fan, flue or wiring
- Gas appliance work should be carried out by a competent, registered engineer
Compliance
| Alternative numbers | 2064434 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| HAMWORTHY HAMWORTHY SPARE PARTS | — | — | — | |
| HAMWORTHY MILBORNE 501 WALL HUNG CONDENSING | — | — | — | |
| HAMWORTHY MILBORNE 502 WALL HUNG CONDENSING | — | — | — |
Documents & drawings
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