Hamworthy
Hamworthy Limit Thermostat 533901179
Hamworthy 533901179 limit thermostat (IMIT LS1) with 90–110°C range, SPDT, for use in a range of Hamworthy gas boilers.
At a glance
- Part type: Limit thermostat
- Also known as 2061946
Showing prices
£77.15
£64.29 ex. VAT · VAT at 20%
Available to order · 3 working days
Available to order · 3 working days
Not certain it's the right part? The technical team verifies fitment before dispatch — no charge, and it stops a second trip.Call the technical teamSend a technical question
Same-day dispatch
Ordered by 4pm Mon–Fri, 10:30am Sat.
30-day returns
Unused, in original packaging.
What it is
The Hamworthy 533901179 is a limit thermostat with a 90–110°C range, manufactured by Hamworthy and designated IMIT LS1. It is an SPDT safety switch that monitors boiler temperature and interrupts the burner circuit if the appliance overheats. It is used across a number of Hamworthy floor standing and wall hung gas boiler ranges.
Signs this part needs replacing
- Boiler repeatedly locks out or requires manual reset after running.
- Overheat cut-out operates before the boiler reaches its set temperature.
- No continuity across the thermostat terminals when tested (SPDT contacts open when cold).
- Boiler fires but shuts down prematurely during a demand for heat.
- Intermittent heating or hot water with no other fault found.
Before you order
- Confirm the part number 533901179 or the IMIT LS1 model matches the existing thermostat.
- Check the temperature range on the existing unit is 90–110°C.
- Verify your appliance model against the fit list above.
- Check the terminal configuration is SPDT.
Compliance
| Barcode / EAN | 5057316092040 |
|---|---|
| Alternative numbers | 2061946 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| HAMWORTHY HAMWORTHY SPARE PARTS | — | — | — | |
| HAMWORTHY MODUMAX 110 FLOOR STANDING | — | — | — | |
| HAMWORTHY MODUMAX 125C FLOOR STANDING | — | — | — | |
| HAMWORTHY MODUMAX 220 FLOOR STANDING | — | — | — | |
| HAMWORTHY MODUMAX 250C FLOOR STANDING | — | — | — | |
| HAMWORTHY PURWELL CLASSIC PC105 FULLY AUTOMATIC FLOOR STANDING | — | — | — | |
| HAMWORTHY PURWELL CLASSIC PC120 FULLY AUTOMATIC FLOOR STANDING | — | — | — | |
| HAMWORTHY PURWELL CLASSIC PC40 FULLY AUTOMATIC FLOOR STANDING | — | — | — | |
| HAMWORTHY PURWELL CLASSIC PC50 FULLY AUTOMATIC FLOOR STANDING | — | — | — | |
| HAMWORTHY PURWELL CLASSIC PC60 FULLY AUTOMATIC FLOOR STANDING | — | — | — |
Showing 10 of 48 compatible appliances.
Fitment listings are a guide, not a guarantee. Plant-room assemblies get modified on site more often than not. Send us the GC number off the data badge and a photo of the existing valve and we will confirm before anything is dispatched.
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.
manual
HAMWORTHY appliance manual — PURWELL CLASSIC PC105 FULLY AUTOMATIC FLOOR STANDING, PURWELL CLASSIC PC120 FULLY AUTOMATIC FLOOR STANDING, PURWELL CLASSIC PC40 FULLY AUTOMATIC FLOOR STANDING, PURWELL CLASSIC PC50 FULLY AUTOMATIC FLOOR STANDING, PURWELL CLASSIC PC60 FULLY AUTOMATIC FLOOR STANDING, PURWELL CLASSIC PC80 FULLY AUTOMATIC FLOOR STANDING, PURWELL CLASSIC PC95 FULLY AUTOMATIC FLOOR STANDING, PURWELL INTEGRA PI100 FULLY AUTOMATIC FLOOR STANDING, PURWELL INTEGRA PI40 FULLY AUTOMATIC FLOOR STANDING, PURWELL INTEGRA PI70 FULLY AUTOMATIC FLOOR STANDING
manualmanualHAMWORTHY 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 — SHAFTESBURY HE110 FLOOR STANDING, SHAFTESBURY HE150 FLOOR STANDING, SHAFTESBURY HE190 FLOOR STANDING, SHAFTESBURY HE220 FLOOR STANDING, SHAFTESBURY HE250 FLOOR STANDING, SHAFTESBURY HE280 FLOOR STANDING, SHAFTESBURY HE310 FLOOR STANDING, SHAFTESBURY HE340 FLOOR STANDING, SHAFTESBURY HE370 FLOOR STANDING, SHAFTESBURY HE400 FLOOR STANDING
manualmanualHAMWORTHY appliance manual — SHERBOURNE S65 WALL HUNG, SHERBOURNE S70 WALL HUNG
manualmanualHAMWORTHY appliance manual — WARMWELL HE W140 FULLY AUTOMATIC FLOOR STANDING, WARMWELL HE W60 FULLY AUTOMATIC FLOOR STANDING, WARMWELL HE W95 FULLY AUTOMATIC FLOOR STANDING
manualmanualHAMWORTHY appliance manual — WARMWELL W120 FULLY AUTOMATIC FLOOR STANDING, WARMWELL W140 FULLY AUTOMATIC FLOOR STANDING, WARMWELL W60 FULLY AUTOMATIC FLOOR STANDING, WARMWELL W80 FULLY AUTOMATIC FLOOR STANDING, WARMWELL W95 FULLY AUTOMATIC FLOOR STANDING
manualmanualHAMWORTHY appliance manual — WESSEX 100HE HIGH EFFICICENCY FLOOR STANDING, WESSEX 50HE HIGH EFFICICENCY FLOOR STANDING
manualmanualHAMWORTHY appliance manual — WESSEX 200HE HIGH EFFICICENCY FLOOR STANDING
manualmanualHAMWORTHY appliance manual — WESSEX 220M HIGH EFFICIENCY FLOOR STANDING
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