Johnson & Starley
Johnson & Starley Transformer 24V 1000-0515730
24V transformer for Johnson & Starley Hispec and Janstar warm air units.
At a glance
- Also known as 1690389
Showing prices
£25.87
£21.56 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 Johnson & Starley 24V transformer is a control component used in Hispec and Janstar warm air units. It reduces the mains supply to 24V to power the appliance's control circuit.
Signs this part needs replacing
- No 24V output at the transformer secondary
- Appliance control circuit dead or unresponsive
- Repeated fuse blowing on the control circuit
- Intermittent operation or no ignition
Before you order
- Confirm your appliance model is listed in the Fits section
- Check the transformer output voltage matches 24V
- Ensure the mains supply is isolated before replacement
- Inspect wiring and connections for damage
Compliance
| GC number | 245-525 |
|---|---|
| Alternative numbers | 1690389 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| JOHNSON & STARLEY HISPEC J25 WARM AIR UNIT | 42-451-04 | 42-451-04 | — | — |
| JOHNSON & STARLEY HISPEC J25RS WARM AIR UNIT | 42-451-08 | 42-451-08 | — | — |
| JOHNSON & STARLEY HISPEC J25SC WARM AIR UNIT | 42-417-96 | 42-417-96 | — | — |
| JOHNSON & STARLEY HISPEC J32 WARM AIR UNIT - REAR RISING DUCT | 42-416-06 | 42-416-06 | — | — |
| JOHNSON & STARLEY HISPEC J32 WARM AIR UNIT PROPANE | 42-416-07 | 42-416-07 | — | — |
| JOHNSON & STARLEY HISPEC J32 WARM AIR UNIT PROPANE - REAR RISING DUCT | 42-416-08 | 42-416-08 | — | — |
| JOHNSON & STARLEY HISPEC J32 WARM AIR UNIT | 42-451-02 | 42-451-02 | — | — |
| JOHNSON & STARLEY HISPEC J40 WARM AIR UNIT | 42-451-09 | 42-451-09 | — | — |
| JOHNSON & STARLEY HISPEC M31 WARM AIR UNIT | 42-451-10 | 42-451-10 | — | — |
| JOHNSON & STARLEY JANSTAR | 42-451-07 | 42-451-07 | — | — |
Showing 10 of 17 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
JOHNSON & STARLEY appliance manual — HISPEC J25 WARM AIR UNIT (GC 42-451-04)
manualmanualJOHNSON & STARLEY appliance manual — HISPEC J25RS WARM AIR UNIT (GC 42-451-08)
manualmanualJOHNSON & STARLEY appliance manual — HISPEC J25SC WARM AIR UNIT (GC 42-417-96)
manualmanualJOHNSON & STARLEY appliance manual — HISPEC J32 WARM AIR UNIT - REAR RISING DUCT (GC 42-416-06), HISPEC J32 WARM AIR UNIT (GC 42-451-02)
manualmanualJOHNSON & STARLEY appliance manual — HISPEC J32 WARM AIR UNIT PROPANE (GC 42-416-07), HISPEC J32 WARM AIR UNIT PROPANE - REAR RISING DUCT (GC 42-416-08)
manualmanualJOHNSON & STARLEY appliance manual — HISPEC J40 WARM AIR UNIT (GC 42-451-09)
manualmanualJOHNSON & STARLEY appliance manual — HISPEC M31 WARM AIR UNIT (GC 42-451-10)
manualmanualJOHNSON & STARLEY appliance manual — JANSTAR (GC 42-451-07)
manualNo technical questions yet for this part.
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