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Video of the boiler firing, sounds louder than it is due to my my phone's mic, but you get the idea After 1 minute the boiler modulates down then quietens to 8KW https://www.youtube.com/watch?v=e5T74L-N0Gg

Many thanks ScottishGasMan.... Before they came to install I took off all the rads outside with a hose & flushed them through, as I knew how much sludge there would be. I drained the system 4 times so the water was clear before the install The pump I replaced, with a brand new Wilo...

Many thanks So are you saying it was a bad idea to install a Vaillant Boiler with Microbore? Is there a solution apart from power flushing with strong chemicals?

The installer flushed the system for about 3 hours approx. connected to one of the radiators pipework Piping is microbore

This is the start of the 3rd Year since I had the boiler installed & just been serviced for a 2nd time Different engineer told me the boiler is kettling which I have heard this noise pretty much from being installed, he suspects the system wasn't flushed properly, as the system was very very...

Sorry I didn't get back to you before Personally I'd look at using a access point instead of the ALFA wifi booster as it still needs to be connected to a 5m cable - a repeater would take this out of the equation Have a look at the Edimax products - very reliable - good value for money...

Have the same boiler & did have the same issue & I found that balancing the Rads did help Check your thermostat isn't near a heat source or a room that get hotter the warm air might be cutting out the stat like was happening with the heat from the kitchen I also found that having the...

gemshan1 If you are confident in using a PC & can spot unusual behaviour then you should be fine without Rapport Make sure you have a good internet sercurity suite installed & you should be fine

Agree with Monkeh It is very dangerous to open a PSU if you don't know what your doing but deffo not illegal Really not worth the risk of putting a cheap & nasty PSU in a system -running the risk of frying the board or even a fire - stay clear of them...

Amstel If the walls in the apartment are concrete - then this is why you are having the issue, if you can locate a repeater(access point with a repeater fuction) by the window as long as it can either have a clear line of sight or be close to then a repeater should solve the problem Best...

The lowest one in the 400 series is the 415 & about £50-£60 less than the 418

Ah ok understood - would this be the reason for the short firing even through the HW isn't even on? Where is the best place to measure the temp on the cylinder?

As far as I'm aware the water temp cannot be controlled by the 418's top HW dial - this is what I was told by the installer? - I just have the cylinder stat set to 60°C From the label is states - supercal Indirect with Econoplus - 117L Capacity So are you suggesting to set the Rad water...

Hi Guys Will try to respond to all questions -sorry if I miss any answers :( CH is on for about 1.5 hours in the morning then about 7-8 hours after 16:30 Sometimes left on during the day at 18°C HW on for about 1 hour/day Currently paying £0.03359 per KW ex vat £0.3088 ex...

Well have been running the boiler for the last 2 days, it was using about 60KW / day when set to 18KW & the rooms weren't staying hot that well Did try on D0 to 8KW but the boiler was constantly on Have set to D0 to 9KW & it's much better temp in all the rooms plus I'm now using about...

As far as I'm aware its the latest one :?: label behind the door states VU GB 186/2-O H Are you suggesting I should leave it at 18KW?

Hi gaswizzard What output would you recommend - it's not an issue of the HW taking longer to heat - if more economic? The old boiler output was only around 10KW & that was fine Dave

Great Thanks Tony That's what I thought, not sure why they were so low? The rad water temp is set to 58°C so I expected the flow to have reached that temp :? at the end of the last firing it was D40 - 47 D41 - 34 It's just fired again after 30 minutes & just stopped at D40 -...

Hi Tony Thanks for your reply, really appreciate your advise That's what I thought ..... wish I'd taken advise from yourself prior to the install...I'm sick & tired of getting bad advise & workmanship from workmen & installers :( Hall way stat is set to 21 Just checked the flow &...

Hi Just had a new Vaillant 418 installed to replace a Ideal minimiser ff30 which has a 10KW output Was going to go for the 415 but was advised to go for the 418 by 2 different companies - so took the advise My monthly gas bill used to be about £35-50 per month with the old boiler Have...