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Your boiler probably doesn't have the drop down door on the front

@@davewellsheatingengineer it does have the drop down door there’s just no valves or nothing to turn it was only installed last year

Not at all, most radiators are over sized in the UK, due to better insulation since the advent of heating in the 70s My home runs rads at a 40c flow temp and my wife like a steady 23c

@@davewellsheatingengineer But the Heat Load ( heat loss ) will setup the flow temperature . With oversized radiator you can reduce the flow temperature , of course , but in the end the heat loss it’s the most important factor .

@luk5827 running at a lower temperature keeps the boiler running in its most efficient mode (condensing) it also increases reliability, we see it on every service, expansion vessels don't loose pre charge, combustion chamber clean, AAvs not crusty or leaking.. I could go on. Running where possible (dependant on property heat loss and emmiter outputs permitting) is without question a far better way to use a heating system

@@davewellsheatingengineer I’m agree 100% with you ! The target it’s to run the boiler as lower flow temperature as possible . But this depends of house heat loss value , depends of heated surface of house , outside temperature , inside desired temperature , settings of gas boiler ( maximal power of gas boiler need to be limited from parameter settings ) , gas boiler modulation range and so on . With radiant heating ( underfloor heating ) and a Passive House you can have a really low flow temperature .

Kamco FX2

Hi did you manage to find an answer to this? Having the same issue myself!

You need a engineer I'm afraid

Hi Either find a drain point or vent a radiator keeping a jar or something under it

Hi I will see if I can upload tomorrow. Should point out that the air control is very very minimal, makes very little difference, unlike a standard pressure jet boiler

Happy Sunday 😊

Hi I assume your boiler is losing pressure (or at least the display is saying it is) Does your boiler have a pressure guage on the front? If it does does it read approximately the same? F75 pressure can not be adjusted, it is what it is.. The causes of F75 are leaking pipes, radiator valves and joints, it doesn't have to be much to reduce the pressure low enough for the boiler to go to fault to protect itself. Check all your radiator valves for any signs of leakage, this doesn't have to be wet but sometimes shows a crusting around the valve. It can also be a leaking Auto air vent in the boiler. It can also be a pump inside the boiler starting to fail. The boiler needs to see that it had enough pressure in it before it does anything, if not you will get f75. If it says there is enough pressure it will then operate the pump, the pump should generate an additional .3 of a bar pressure, if it doesn't it will fault to f75. Get a good vaillant specialist or call Vaillant (or me if I'm in your area lol) Best wishes

I would suspect a pressure sensor fault or fill valve fault. Call an engineer to repair

Hi Post a photo 📸 of what you have

1.3 rising to 2bar isn't awful. I would leave it at that but get a heating engineer in when you can to check the expansion vessel pre charge and also if the system needs an additional expansion vessel (all depends on volume of the system but a good engineer will work this out )

@@davewellsheatingengineer thank you very much.The vessel was pumped to 1.5 bar before 2 months. I leave it as you adviced me.

@Metco81 did they empty the expansion vessel and leave it open when testing and recharging the pressure? It must be done like this.

@@davewellsheatingengineer yes he has drained the water inside and then pumped.

@@Metco81 check with you engineer. May need additional expansion

Thank you, good luck with your leak.. check around radiator valves.. it really doesn't have to be much for the pressure to drop

Excellent.. it is blooming cold 🥶

Brilliant well done.. every day is a school day

thank you for your kind comment, pleased it helped

That's fantastic. Thank you so much for taking the time to comment.

does your boiler have a flap down door as in the video?

@@davewellsheatingengineer yes it’s exactly as in your video

sounds like someone has removed them, you can buy them, but for safety probably best to call a heating engineer to pop a couple on for you@@Marinda2610

Yes the sustain will have a separate filling loop, usually a braided flexible pipe near the boiler with valves either end. The principal is the same though

So glad I helped 😊

The boiler determines wether to run on low or high flame, it would all depend on demand at the time.

That is so lovely, thank you . Happy Christmas to you and your family

fantastic... anytime you need me to pop over to Spain and service your boiler just say the word 😊

I assume this is just the hot taps, if so one of the valves I show in the video is on the on position, it will be the righthand valve make sure it is turned to the off position

@@davewellsheatingengineer It’s not the refill pipe that is the problem,the problem is that when the boiler doesn’t work,no water goes through it to the hot taps not even a drip all my hot taps in my house are completely dry.I think it might be because of the pressure in the water main as after a while 1 or 2 hours water appears at the taps and the boiler works.Maybe because the pressure has gone up in the water mains.I have spoken with the guy who services the boiler and he’s not sure.Would the water pressure to the boiler cause this?

@@stephenwright2056 the refill valve on the right is a diverter, it diverts water from the main supply that usually goes through your boiler to filling topping the pressure up, it is very likely this valve has either developed a fault or been left in the on position. Incoming water pressure would affect hot and cold.. yours is just hot

@@davewellsheatingengineer Them valves haven’t been touched they are in the off position.They are not the problem,the boiler simply doesn’t turn on and no water (and being the boiler isn’t on it would be cold )is in the hot taps no drips or any water at all.Then a bit later (this time 1 or 2 hours) the boiler starts up.I think it’s the water pressure from the cold water main that’s got reduced pressure and that pressure isn’t enough for the boiler.I have 1.6 bar at my water meter,i suspect that the water pressure is reduced possibly because of a leak or reduced pressure from down the pipeline.Because even if the boiler doesn’t work i should still get cold water through the hot taps.Thanks for your interest.Do you know if the water pressure isn’t enough would i still get cold water through the boiler to the hot taps.

@stephenwright2056 a boiler doesn't need to be on to have water flowing through it to the taps. Ask when did this start May I suggest you go to the boiler, turn the righthand fill valve on and off a few times whilst having a hot tap open

That's fine. Just nice to run a little lower, but perfectly fine at 1.7

Thank you so much Please like and subscribe so you get notifications when I upload more info on the Ecotec boiler

Love the kind comment.. definitely need a hot bath 🛀 on a day like today brrr

Hi I have found Smart Plus pretty good apart from initial link up where you can get the unstable message, the truth is there are no hacks, just keep doing it and it will link, once linked we rarely have any issues (so long as the receiver is within range of your WiFi. Also, I find it so much easier linking with android rather than apple, once linked then any device will link on with user name and password.

I'll put up a video of linking and using smart plus ASAP. Please like and subscribe

Thanks, I’ll see if I can get an different phone to get it linked. 👍