These will fit Potterton Suprima Boiler.models 30 to 80 fitted with the
EARLY VERSION PCBS 407750 OR 5102160.

If you are getting intermittent faults a break in the cables can cause this may need replacement.

90% of lock out problems are due to the failure of the PCB, the other 10% can be due to breakdown of the cables or connectors.

Simple procedure to replace - takes less than 15 minutes, and could save you ££s and a lot of frustration.

Limited stock of these wiring harness -  Clearance Price - when they're gone, they're gone!

See our separate listing for the Electrode Lead which is also available.