Boiler pressure & radiator noise

[girlracer68]

I have read through the FAQs, previous posts etc but I'm still not sure re the boiler in my new house, so apologies if this is repeating stuff...
My landlord insists the 'vaillant ecotec plus' boiler was serviced just before we moved in but the pressure when in use (heating and for hot water) reaches 3.7 bar (the furthest point on the dial in the red), and the upstairs radiators bang when the heating comes on. The gas bill is also huge compared to my old house which also had a vaillant boiler.

So, firstly is the pressure too high and if so what might happen?

Secondly is it just air in the radiators causing the noise therefore bleeding them will sort it, or is the the boiler pressure causing it?

And thirdly will it affect the amount of gas being consumed?

My landlord is a bit tedious so I wanted to check it out here before I ask him to call out the plumber.

Thanks in advance

 

[Burnerman]

Your boiler pressure is much too high - 1 bar is usually about right.
I would be surprised if water wasn't discharging to the outside overflow pipe - the release valve of which should operate at 3 bar (usually with a bit of a bang)!
I suspect the boiler expansion vessel needs to be repressurised with air and hopefully that will help things - its also important that the boiler filling loop isn't allowing fresh water to enter the boiler system.
There's no connection between boiler pressure (central heating) and the domestic hot water supply.
Your landlord needs to address all of these issues before you can accurately estimate your gas consumption.
John

 

[girlracer68]

I contacted my landlord who has given me his plumber's number, so at least I can deal with it now instead of going through him, phew! Thanks so much for the quick response, I knew here was a problem but kept being assured by my landlord that the boiler was ok... I'm glad I persevered!!

Happy new year, Lisa

 

[Burnerman]

A pleasure and a Happy New Year to you too
Hopefully your plumber will stabilise the boiler pressure, and eventually it should be at around 1 bar, maybe increasing to 1.5 bar when the heating is on.
Any other crazy increases in pressure indicate a filling loop which is constantly passing a small quantity of water, or an internal boiler fault which is considerably more expensive.....
If you'd be kind enough to post back with any results?
John

 

[girlracer68]

I'll let you know the outcome as I guess it could be useful information. Thankfully the cost of repairs won't be mine...!

Cheers
Lisa

 

[Whitespirit66]

Thankfully the cost of repairs won't be mine...!

Rigsby will probably up your rent to compensate!

 

[girlracer68]

You could be right ...