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Yes that serial is 2015. Noise from them is often the gas valve at fault. It is a Glowworm ultracom 2. Badged as BG I would repair as that boiler should have another 10years ish left in it

Check the settings on a nest. When you first set it up it has disinfection enabled which means it wants to to do 1 hour of hot water first. I always disable this.

5 years old? What is the boiler serial number? Don’t think these have been manufactured for about 10 years

unplug the purple cable ribbon from both ends onthen replug back on . do this 10 times for both ends. they start to corrode and make poor contact. make sure you also turn the power off at the fused spur and not the front switch. 50/50 chance this could be the fault. But also check that this...

It won't be as that info is restricted for those of us who do this for a living!

Is the error H1 or H1. (. A dot after indicates a short). This is often the case with these boilers. Check ionisation probe cable. Often cable shorts on casing

the reason the boiler is taking so long to get up to temperature is because the software will only allow a temperature difference between flow and return of around 20 degrees. i'm fairly certain from what you have described is whats's happening. this is normally caused by poor balancing, system...

I would say that the problem lies with system balancing. Do any radiators get hot? Does the system have an external auto bypass? if so adjust to 4. An easy check to see if it's the controls or the system is to force the boiler into chimney sweep mode. press OK button for 5 seconds. system...

the batteries normally last about 3 years. high battery usage is normally because it is struggling to communicate with the receiver on the boiler. Make sure you don't have stuff in front of the boiler. ( only a door etc)

Don’t bother changing. With under floor set the temp and then just leave it. Changing the temp won’t save you much money but will cause wild temp fluctuations. If you are going to turn the temp down only drop the temp for about 6 to 8 hours . Usually 8pm till 4am.

There are a variety of methods that can be used. The quickest and most effective is a flushing machine(but only a decent machine). Mains flush as your has been done is often nearly as effective especially if he reversed the flush. just a chemical flush is the slowest. All of these should be...

you can't activate the fire valve by pressing the button. the only way to close the valve is for the temp to go over 66C. This is one of your problems though. someone has fitted the wrong fire valve. it should be a 85 /90c on a pressure jet burner. If it's a lack of fuel i would be looking at...

genuine syncron motors have stamped syncron on the top. the copy versions have stamped syncronous. genuine should last about 6 to 8 years. copies will last about 2 to 3 years. you could have just undo the 4 screws and replaced the plate with the ball. much easier

the back casing is quite thick and it would need to have been leaking for at least a year for it corrode through. i have changed loads with vastly more corrosion and they have been fine

very common fault on these boilers at 12/15 yrs. it is a fairly quick repair. takes about 1hr but requires the system drain down.

possibiliy just the oil stem failed

the volume of glychol and cost for that size accumulator would be enormous. it would require around 20lt for every 100lt. so it would cost in the region of £1500. No one in there right mind would do this. And then there is the requirement for safety and storage in the event of a drain down.

the timer for hot water on the gas combi's turns the preheat off. ideal for night time or periods when you aren't at home. Now that many of the smart apps have geo fence they activate all these savings once you are further than x from the home. I have a few customers where we have used the...

Use the honeywell lyric t6rw+hw. This will control both heating and hot water

Armaflex. Black uv resistant. Look at gogeothermal.co.uk