leaking pulsacoil

I have a pulsacoil in my flat in York , it has small leaks which aparently make the unit short and i need to press the reset button to get it started again . the plumber tells me its obsolete ( its only 8 years old) and i need a new one at a cost of £1000.00 plus .
Does anyone know if this is correct ?

Yes I do know and this is NOT correct. He's making up stories to suit himself!

The leaks will be from the immersion heater thermostat pockets. You'll need to replace the heater elements and thermostats to fix it. They are freely available from suppliers like www.segel.co.uk or from Gledhill themselves.

Cheers, Mike