no you can shut heating inlet and out let valves under the boiler also main water inlet valves make sure all
power supply is off drain out water from boiler by opening
overflow pr valve
lal
August 2011
Automatic Answer
While you wait for answers, we may have found some information which could help you.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix plumbing.