Recent: Fix food processor motor?

Mend Home Heating Systems

Mend Heating, Home Heating Systems
Find out how to mend it for free.

Ask Question
Mend Heating, Home Heating Systems
Find out how to mend home heating systems

Mend > Home Heating Systems

Mend Central Heating Running

Why is there a vacuum in sealed central heating system?

The pressure in my sealed central heating system increases to about 2.5Bar when hot and running and drops to a vacuum when cold. It is Grants oil boiler. The expansion tank has already been replaced.

Bob Davis
January 2009

Automatic Answer

While you wait for answers, we may have found some information which could help you.

Click here for Central Heating Running

Mend Heating, Home Heating Systems
Find out how to mend home heating systems

How to mend ...

Find out how to mend just about anything howtomendit.com for free repair help, information and advice.
Mend Heating, Home Heating Systems
Find out how to mend home heating systems