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View the thread, titled "Vailant ecotec pro 28 pressure" which is posted in UK Plumbers Forums on UK Plumbers Forums.

Hello.

I’ve lived in the property for 4 years and anytime the pressure got low (0.8 bar) I would use the fill taps to release more water into the system. Ever since British Gas did their annual boiler check about 3 months ago, I’ve had to do this too up method more and more. My pressure is now 1.8 bar which is too high but seems to lose pressure and need topping up every other day. I can’t see any leaks and the pressure reading isn’t changing so any ideas why I’m losing my hot water and heating until I let some more water into the system and then it fires straight back up?
 
So BG came round today and said 2.9 bar is ok!??!! I called back afterwards as that’s not what it says anywhere else and they are sending someone else tomorrow.

I drained the radiators and the reading was stuck at 1.7 bar so turned on the boiler without refilling as didn’t want to add more pressure. It made a lot of strange noises and smelled a bit funny but not of gas. I then checked the dial and it had zero pressure at all. I quickly filled it with some water from the full loop and it’s working again but worried I’ve done damage.
 
😀 standard bg least they turned up I wouldn’t go off the digi guage go off a mechanical one

As the digi pressure sensor is fecked / blocked
 
Thanks, definitely a lesson learnt. Is it possible I’ve done damage starting it up with low pressure/hardly any water as believed it was at 1.7 bar? It made a real racket as though trying to flush water through and had a funny smell, not burning or gas though. I then filled with water but still not enough so made the same noise then I ended up filling up and seems ok now but worried it could have caused damage?

I’ve just turned it off now until BG come tomorrow.
 
Short term you are fine long term eg overheating sounds like an aircraft going over thumping and banging etc it would cause damage
 
Your expansion vessel inside the boiler needs checking for its correct pressure this needs to be done with the boiler drained it should be between 0.7 to 1 bar any reputable engineer can fix this if it's found to be ruptured it may need replacing and possibly a couple of smaller parts . Kop
 
Thanks for the reply, I will mention it to them tomorrow (they cancelled the appt). I have a feeling that it will be a repeat of the first appt whereby they will turn up, say there’s nothing they can see wrong from a quick visual inspection and leave 😩

Any tips on what I could say to make them stay and fix the actual issue? 😂
 
Ask for a senior repair engineer as the fault is still there

Also there in breach of contract as they haven’t repaired the boiler so you would like a refund on the repair and maintenance contract I’m guessing you went for this type
 
BG are not the company they once were I went to a install yesterday they fitted only just over a year ago looked rushed and lacked the finishing touches , the benchmark was unreadable and obviously completed in the van the first service should have been free but they could not service the boiler for the next six months apparently?? Another one I have on my books now . Kop
 
So BG checked the expansion vessel today and it was totally flat so recharged it and no water was coming out so was convinced it didn’t need replacing. The pressure looks like it’s starting to drop already though but hard to tell as apparently my pressure sensor needs replacing too which they should be doing on weds. What would cause the expansion vessel to do that if not damaged? If it is still dropping pressure, what next? 😅 Thanks again.
 
Replace the expansion vessel and I'd do the pressure relief valve aswell, give it a proper service not just a safety check take the burner out completely clean inside the heat exchanger clean the electrodes and flush through I've had a failed heat exchanger you will know if it absolutely filthy in there, the flow sensor is a common problem especially on systems without a magnetic filter or badly maintained without a inhibitor they clog up with system debris so if your systems dirty ? then it's likely to happen again . Kop
 

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