Recently moved in and inherited a newish potterton promax 15/2 HE boiler, it does not appear to have a pump overun function is this due to a bad electrician or because it has an aluminium heat exchanger so doesn't need pump overun?
Interested in anyone's thoughts for peace of mind.

JOF

John O'Flaherty, August 2006

If you read the installation manual, wich should be left with the boiler/property etc you will find that they don't need one.

Cheers

a sad plumber, October 2006