Boiler pressure erratic

[siousxiesue]

I posted a while ago and asked for tips to combat high pressure readings. The solution (bleeding radiator) does work but I seem to be trapped now in a pattern of too high/low.

I'm guessing a service is in order but has anyone any tips for keeping a boiler pressure happy?

It's put on in the morning and turned off/low for the day until the evening when it's turned up.

[SpringTime]

Sounds like a leak in the system - probably concealed and out of view. Water coming out and air coming in. Anyway don't listen to my advice Siousxie, you just need a good local plumber!

[GrahamP]

Check the expansion vessel pressure and top up if required.

(The check should be part of the service procedure)

For more info, Google - central heating expansion vessel pressure

[DulwichFox]

My Vaillant Boiler developed a Fault where the pressure reached 2.6 Bar

normally would be 1.5 - 1.6 when on Max temp.

The Boiler had its Yearly Service By Vaillant but the fault returned.

The Fault was F75 which I Googled and it was suggested it was either the Pump or Pressure sensor.

Vaillant engineer cam back and changed the Sensor and now seems OK. 5 minute job.

The Sensors can get clogged and then cannot control the pressure.

DulwichFox

[ED - NAGAIUTB]

I use Ben +44 7734 351727. He's local and very reliable. Worth giving him a bell and maybe getting him to pop by. Maybe leave it an hour or two though as he's mid way through fitting a new rad for me :-)

[Gashubservices]

Contact daniel at gas hub services 07801498084

[siousxiesue]

Thanks to all, boiler guy coming Sunday!

[gbear77]

I would recommend Daniel too. He was able to fit me in at short notice, was competitively priced and thorough with his inspection.

[Townleygreen]

If the pressure keeps dropping, it means you have a leak somehwere in your system.

If it's below your ground floor then there may not be any sign of a leak.

You can use Fernox F4 Express Leak Sealer which you insert in a radiator bleed nodule and it usually sorts the problem.