We get many calls from customers asking why is my boiler leaking.
Boiler leaking, It’s never done this before,
it now stopped working and showing a fault code and the pressure
has dropped to zero, what has happened?
Many of today’s boilers now work under high pressure and should the pressure
drop due to the boiler leaking, they will go into safety mode and shutdown.
This is to protect themselves from overheating and damage.
First we need to establish when this problem started.
If the boiler has been installed for a while and there were no problems before,
then the chances of a leak on the pipework are very slim.When we attend a job where the customer states my boiler is leaking please help,
Now, we need to know when the boiler was last serviced, this is very important.
Once that is all set up, we now check the expansion vessel.
If it is not working properly then the boiler will shutdown and
show a fault code and the pressure will most of the time be at zero.Most of the time when we attend a call re leaking boiler, the customer tells us I think my boiler is leaking.
The expansion of the water has to go somewhere, this is
where the expansion vessel starts to work.
it takes up the expansion of the water.When the expansion vessel is fitted to the boiler or the system,
it is pumped up to a certain pressure, overtime this pressure will drop out.
On most combination boilers the vessel is fitted within and set at the factory.
The expansion vessel should be set according to the whole system.Should the expansion vessel loose its pressure then the water expansion
has nowhere to go other than to the safety relief valve, where the pressure will drop down to zero.When an annual boiler service is carried out the
expansion vessel seems to get overlooked for some reason, but it needs to be check without fail. So when we are asked to help my boiler is leaking,
we know most of the time that it’s not the boiler but the expansion vessel.So now when you have your boiler serviced ask the
service engineer if they have checked the expansion vessel and reset it, if needed
Like to know more about how Duval Heating can help you with your boiler and heating problems, even book an appointment for one of our engineers to call on you. Use our Contact page
01473 806 100
Duval Heating 1985 - 2019