Worcester Bosch
Worcester Bosch central heating thermostat 87161423410 (Ranco K36-P1332)
Genuine Worcester CH thermostat (Ranco K36-P1332) for the Highflow 400 BSN and BSP combi boilers.
At a glance
- Also known as WB87161423410, 1018089
- Isolate the electrical supply before removing the old thermostat; fitting must be carried out by a Gas Safe registered engineer
£360.00
£300.00 ex. VAT · VAT at 20%
Call 01302 279234 to check availability
Same-day dispatch
Ordered by 4pm Mon–Fri, 10:30am Sat.
30-day returns
Unused, in original packaging.
What it is
The 87161423410 is Worcester's central heating thermostat, a Ranco K36-P1332, fitted to the Highflow 400 combi range. It senses the temperature of the primary (central heating) water and switches the burner off once the set temperature is reached, protecting the system from overheating.
Signs this part needs replacing
- Central heating overheats or cycles on and off much more frequently than usual
- Boiler locks out on an overheat or thermostat fault
- Radiators run hotter or cooler than the setting suggests they should
- Thermostat fails to switch the burner off at all, or switches it off too early
Before you order
- Match the part number 87161423410 and the Ranco reference K36-P1332 to your existing thermostat
- Confirm your exact boiler model and gas type (NG/LPG)
- This part is listed as obsolete, so check stock before committing to the repair
- Isolate the electrical supply before removing the old thermostat; fitting must be carried out by a Gas Safe registered engineer
Mechanical
| Part type | THERMOSTATS |
|---|
Compliance
| Manufacturer part number (MPN) | 87161423410 |
|---|---|
| GC number | 173-051 |
| Alternative numbers | WB87161423410, 1018089 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| WORCESTER HIGHFLOW 400 BF COMBI LPG | 47-311-22 | 47-311-22 | — | — |
| WORCESTER HIGHFLOW 400 BF COMBI NG | 47-311-19 | 47-311-19 | — | — |
| WORCESTER HIGHFLOW 400 OF COMBI LPG | 47-311-23 | 47-311-23 | — | — |
| WORCESTER HIGHFLOW 400 OF COMBI NG | 47-311-20 | 47-311-20 | — | — |
| WORCESTER HIGHFLOW 400 RSF COMBI LPG | 47-311-21 | 47-311-21 | — | — |
| WORCESTER HIGHFLOW 400 RSF COMBI NG | 47-311-18 | 47-311-18 | — | — |
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.
WORCESTER appliance manual — HIGHFLOW 400 BF COMBI LPG (GC 47-311-22), HIGHFLOW 400 BF COMBI NG (GC 47-311-19)
manualmanualWORCESTER appliance manual — HIGHFLOW 400 OF COMBI LPG (GC 47-311-23), HIGHFLOW 400 OF COMBI NG (GC 47-311-20)
manualmanualWORCESTER appliance manual — HIGHFLOW 400 RSF COMBI LPG (GC 47-311-21), HIGHFLOW 400 RSF COMBI NG (GC 47-311-18)
manualNo technical questions yet for this part.
Not sure which part?
Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.