Baxi
Baxi Controller TR-04 7875816
Baxi Controller TR-04, part number 7875816, for Aquaheat Hi and HWI appliances.
At a glance
- Appliance family: Aquaheat Hi / HWI
- Also known as 1129454
£613.27
£511.06 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 Controller TR-04 is a Baxi control component listed under part number 7875816. It is used on Baxi Aquaheat Hi and HWI appliances, where it manages the control functions of the unit. It is a service part intended for fitment by a competent heating engineer.
Signs this part needs replacing
- The appliance does not respond to control inputs
- Erratic or unpredictable operation of the heating or hot water cycle
- The appliance fails to fire or shuts down unexpectedly
- Fault codes or indicator behaviour pointing to a control fault
- Intermittent operation that cannot be traced to another component
Before you order
- Confirm your appliance model matches one of the fit lines listed above
- Check the part number on the existing controller against 7875816
- Verify the fault is with the controller and not a sensor, thermostat or wiring issue
- Confirm the appliance is safe to isolate before any inspection or replacement work
Compliance
| Alternative numbers | 1129454 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| BAXI AQUAHEAT HI/ HWI - 4/50 | — | — | — | |
| BAXI AQUAHEAT HI/HWI - 14/50 | — | — | — |
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 documents held for this part. The technical team will source them from the manufacturer — usually the same working day.
No technical questions yet for this part.
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