Potterton
Potterton Control LMU PCB 640640
Potterton control LMU printed circuit board, part 640640, for 80 kW commercial boilers up to serial number 810XXXX.
£757.20
£631.00 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 Potterton Control LMU (PCB), part number 640640, is the control board used on Potterton Commercial appliances rated at 80 kW. It carries the ignition, sequencing and safety control functions for the boiler, managing burner operation in response to the demand and sensor inputs. This version is specified for units up to serial number 810XXXX.
Signs this part needs replacing
- The boiler goes to lockout and cannot be reset from the controls
- No display or no response when power is applied to the appliance
- Burner fails to fire despite a confirmed demand and healthy sensors
- Repeated nuisance lockouts or intermittent operation with no clear external cause
- Visible damage to the board such as track or component failure
Before you order
- Confirm the existing board carries part number 640640
- Check the appliance serial number falls within the range covered up to 810XXXX
- Verify the boiler rating is 80 kW, as this board is specific to that output
- Isolate the electrical supply before removing or fitting the control board
No specification data held for this part.
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| POTTERTON COMMERCIAL PARAMOUNT TWO - 80 KW | — | — | — | |
| POTTERTON COMMERCIAL POTTERTON COMMERCIAL SPARES | — | — | — |
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.
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