Johnson & Starley
Johnson & Starley Heat Exchanger B500-0300005
Heat exchanger for Johnson & Starley Hispec J50, JB40-50 and JGD35-42V warm air units.
At a glance
£936.88
£780.73 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 HEAT EXCHANGER (WAU) is a heat exchanger assembly manufactured by Johnson & Starley for use in its warm air units. It transfers heat from the combustion gases into the circulated air stream, forming the core component of the appliance's heat transfer path. This part is identified by Johnson & Starley part number B500-0300005.
Signs this part needs replacing
- Visible cracks, splits or perforations in the heat exchanger walls
- Soot or corrosion build-up on the exchanger surfaces
- Combustion readings outside the appliance's specified range that cannot be corrected by adjustment
- Discolouration or heat damage to the surrounding casing or insulation
- Repeated flame failure or unstable combustion linked to a compromised exchanger
Before you order
- Confirm the appliance model against the fit list above
- Note the manufacturer part number B500-0300005 and check it matches the part being removed
- Inspect the surrounding casing, seals and gaskets for damage that may need attention at the same time
- Verify the appliance's data plate details before ordering
Compliance
| GC number | 245-046 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| JOHNSON & STARLEY HISPEC J50 WARM AIR UNIT | 42-451-13 | 42-451-13 | — | — |
| JOHNSON & STARLEY JB40-50 WARM AIR UNIT | 42-417-65 | 42-417-65 | — | — |
| JOHNSON & STARLEY JGD35-42V CF AIR HEATER | 42-416-56 | 42-416-56 | — | — |
| JOHNSON & STARLEY JOHNSON AND STARLEY HISPEC J50 | — | — | — | |
| JOHNSON & STARLEY JOHNSON AND STARLEY JB40-50 | — | — | — |
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.
No technical questions yet for this part.
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