Thank you, just subscribed. Well explained, Newly qualified gas engineer here, ive done few boiler services, but not a vaillant yet, but I do have x 2 vaillant Eco booked in for services, so while looking for some tips and advice I came across this video, helpful. Do you have anymore videos about full boiler services please?
I keep thinking of doing some full videos on boiler services. I will do some soon. I find unless its ideal boilers and maybe vokera, heat exchangers rarely need cleaning. Worcester bosch have fan pressure test points which indicate when the heat exchanger needs cleaning. I myself generally will do the expansion vessel on most services now. Its such an important component, doesn't take long to do, looks good when the customer is watching and really does prevent breakdowns. You don't want prvs opening up on boilers due to the expansion vessel not being pressurised 👍
Great video, my boiler was raising pressure goin in red . Aparantly there was 0 pressure in the vessel... after bringing the pressure back to 1 it was all sorted for a little After 2 days it went from 1.4 bars slowly to 2.4 All that starting to happen after I got 3 radiators changed by a plumber who drained the system Am I looking to change something? I really do not want to but your videos are great and I love DIY and looking for and excuse to make it myself 😂
I would check the expansion vessel again. Sometimes they seem to hold the pressure after you have pumped them up but then they lose it over a few days. Then a new expansion vessel is required im afraid...
Different vessels need pumping to different pressures. 1.5 seems high but you would need to check the Vaillant manual. It is usually 0.75 to 1.0 however for most vessels
Hiya, great video. Got the same boiler so really helpful to see as vessel needed recharging. The water drained from the boiler had black bits and smelt burnt almost, is this normal?
Thanks for the advice, I have just changed the expansion vessel according to your advice, but you didn't say how long to let it purge on its own at the appointment? And how do we know that there is no more air in the system?
ruclips.net/video/0n8tjQm0MBA/видео.html Vaillant does have a purge function that you can activate. I have done a video on that. Just let it run for the whole programme. I think it is about 10 minutes...
...if it is an old Vaillant like on the video there might not be a purge cycle im afraid. If not i always turn the heating on and then off again quickly just to get the pump running but not actually firing up and igniting. The pump usually stays on for a few minutes and is enough time for any air to escape through the automatic air vent which is in the boiler near the pump...
I did this before watching, I only isolated the one valve I drained but didn't isolate the other, as I thought it is not needed to be if not draining. Is isolating both always required, even if not draining the other? If so have i caused potential damage?
If you don't isolate both valves, you are not isolating the boiler from the rest of the central heating system (radiators, pipework), therefore you will start draining the whole system and not just the boiler. Its not a problem if you drain the whole system but not necessary..
Thank you very much for your response, I appreciate it all lot. One more question if you don’t mind me asking. Why do you drain the right valve specifically? Wouldn’t you drain both left and right valves in the case of the bar being too high?
Sorry for the slow reply. It doesn't matter which side you drain as long the pressure goes down to zero and you just need to keep one side open (again it doesn't mater which side/you can open both if you like) while you pump the vessel up...
mine keeps coming up with an F22 error and 0.0 on display So i topped it up a bit just to 0.9 and the boiler started up. I thought great ive sorted it, but then when it was running the pressure keeps raising and raising luckily i spotted it at 4.3 so quickly shut it off. Went back to look in the cupboard and low and behold F22 code was back and 0.0 on the display. So i did the same again but this time watched it and it literally creeps up on the pressure gauge very quickly as im stood there so ive turned it off 🤷🏻♀️ typical friday night and blooming freezing weather 😖
It sounds like the expansion vessel needs re pressurising (pumping up). If this is flat, then the pressure will always go when the heating is on. This is because the water in your system expands when it gets hotter and therefore pressure goes up...
@@northwestgascertificates thank you so much for replying to this. I can't tell you how much more confident I feel calling somebody to come help now I have an idea what's potentially going on. If you were local id most definitely have asked you to come fix it for us. Thank you. These videos are super helpful for people like myself who have no idea about these things.
@@northwestgascertificates I will definitely sound like I know what I am on about thanks to you. When you're a female on your own you some times worry about sounding daft and like you don't know anything. Cheers for your help. It's helped me more ways than I can say!! Have a great weekend 🙂
The pressure will always go down over time. The bigger the installation, ie 12 radiators, you will need to re pressurise most services (each year). Smaller installations ie 4/5 radiators, probably every 3 or 4 years
@@northwestgascertificates Very interesting, thanks very much for that so if over time the expansion vessel is not checked and all air has gone a fault could be mistaken for damaged internal diaphragm because no cushioning action and systems pressure when set will soon discharge water via prv and need constant refilling.
@@christophernunn943 yes an expansion vessel does need to be checked/serviced. Suppose just like a car tyre, they will always go down. Then when they are at zero bar/pressure they will be more prone to damage. The diaphragm can break. Then its a new expansion vessel and also yes no cushioning so more often than not the pressure will go over 3 bar when the heating is put on and the pressure relief valve will need sorting as once they open, pressure relief valves will often leak...
Is regin hand pump good? Worth it? Im thinking about buy one to make it easier to store it in tool bag rather than carrying big bicycle pump.@northwestgascertificates
Worth mentioning about leaving on boiler during dropping the pressure and make sure it shows f22, or the pressure sensor would need changing. Good video bud, but please stop chewing gum in my ears
Nice one, especially showing P. settings, most installers never do this. regards, George Staszak 😀👍
Very well explained and demonstrated. I suspect that my diaphragm has gone so now I know what to do. Thanks so much
Hi pal
You can't imagine how you helped me.I did it step by step n sorted my issue
Thanks a lot !!!
Fantastic walkthrough tutorial thank you for the upload.
Great video, very very useful. Sorted my issue myself. Thank-you!!
Love vaillants. Haven't worked on one in ages.
Nice and easy...well built 👍
Thank you, just subscribed.
Well explained, Newly qualified gas engineer here, ive done few boiler services, but not a vaillant yet, but I do have x 2 vaillant Eco booked in for services, so while looking for some tips and advice I came across this video, helpful.
Do you have anymore videos about full boiler services please?
I keep thinking of doing some full videos on boiler services. I will do some soon. I find unless its ideal boilers and maybe vokera, heat exchangers rarely need cleaning. Worcester bosch have fan pressure test points which indicate when the heat exchanger needs cleaning. I myself generally will do the expansion vessel on most services now. Its such an important component, doesn't take long to do, looks good when the customer is watching and really does prevent breakdowns. You don't want prvs opening up on boilers due to the expansion vessel not being pressurised 👍
Great video- thank you 👍
Great video, my boiler was raising pressure goin in red .
Aparantly there was 0 pressure in the vessel... after bringing the pressure back to 1 it was all sorted for a little
After 2 days it went from 1.4 bars slowly to 2.4
All that starting to happen after I got 3 radiators changed by a plumber who drained the system
Am I looking to change something? I really do not want to but your videos are great and I love DIY and looking for and excuse to make it myself 😂
I would check the expansion vessel again. Sometimes they seem to hold the pressure after you have pumped them up but then they lose it over a few days. Then a new expansion vessel is required im afraid...
My engineer pumbed the vessel at 1.5 bar . Is that too much because boiler pressure reaches 1.9bar when its on
Different vessels need pumping to different pressures. 1.5 seems high but you would need to check the Vaillant manual. It is usually 0.75 to 1.0 however for most vessels
Hiya, great video. Got the same boiler so really helpful to see as vessel needed recharging.
The water drained from the boiler had black bits and smelt burnt almost, is this normal?
You might need your corrosion inhibitor topping up in your system as that will be corrosion. The radiators etc can rust internally...
Thanks for the advice, I have just changed the expansion vessel according to your advice, but you didn't say how long to let it purge on its own at the appointment? And how do we know that there is no more air in the system?
ruclips.net/video/0n8tjQm0MBA/видео.html
Vaillant does have a purge function that you can activate. I have done a video on that. Just let it run for the whole programme. I think it is about 10 minutes...
...if it is an old Vaillant like on the video there might not be a purge cycle im afraid. If not i always turn the heating on and then off again quickly just to get the pump running but not actually firing up and igniting. The pump usually stays on for a few minutes and is enough time for any air to escape through the automatic air vent which is in the boiler near the pump...
I did this before watching, I only isolated the one valve I drained but didn't isolate the other, as I thought it is not needed to be if not draining. Is isolating both always required, even if not draining the other? If so have i caused potential damage?
If you don't isolate both valves, you are not isolating the boiler from the rest of the central heating system (radiators, pipework), therefore you will start draining the whole system and not just the boiler. Its not a problem if you drain the whole system but not necessary..
Thank you very much for your response, I appreciate it all lot. One more question if you don’t mind me asking. Why do you drain the right valve specifically? Wouldn’t you drain both left and right valves in the case of the bar being too high?
Sorry for the slow reply. It doesn't matter which side you drain as long the pressure goes down to zero and you just need to keep one side open (again it doesn't mater which side/you can open both if you like) while you pump the vessel up...
Does the boiler need to be left on in this whole process?
I would turn it off...
@northwestgascertificates thanks and great video pal
mine keeps coming up with an F22 error and 0.0 on display So i topped it up a bit just to 0.9 and the boiler started up. I thought great ive sorted it, but then when it was running the pressure keeps raising and raising luckily i spotted it at 4.3 so quickly shut it off. Went back to look in the cupboard and low and behold F22 code was back and 0.0 on the display. So i did the same again but this time watched it and it literally creeps up on the pressure gauge very quickly as im stood there so ive turned it off 🤷🏻♀️ typical friday night and blooming freezing weather 😖
It sounds like the expansion vessel needs re pressurising (pumping up). If this is flat, then the pressure will always go when the heating is on. This is because the water in your system expands when it gets hotter and therefore pressure goes up...
@@northwestgascertificates thank you so much for replying to this. I can't tell you how much more confident I feel calling somebody to come help now I have an idea what's potentially going on. If you were local id most definitely have asked you to come fix it for us. Thank you. These videos are super helpful for people like myself who have no idea about these things.
Ask them it needs a service as the expansion vessel requires attention 👍👍
@@northwestgascertificates I will definitely sound like I know what I am on about thanks to you. When you're a female on your own you some times worry about sounding daft and like you don't know anything. Cheers for your help. It's helped me more ways than I can say!! Have a great weekend 🙂
Same happened to me last week 😢
Was there an air leak in the first place? no mention as to why pressure was down.
The pressure will always go down over time. The bigger the installation, ie 12 radiators, you will need to re pressurise most services (each year). Smaller installations ie 4/5 radiators, probably every 3 or 4 years
@@northwestgascertificates Very interesting, thanks very much for that so if over time the expansion vessel is not checked and all air has gone a fault could be mistaken for damaged internal diaphragm because no cushioning action and systems pressure when set will soon discharge water via prv and need constant refilling.
@@christophernunn943 yes an expansion vessel does need to be checked/serviced. Suppose just like a car tyre, they will always go down. Then when they are at zero bar/pressure they will be more prone to damage. The diaphragm can break. Then its a new expansion vessel and also yes no cushioning so more often than not the pressure will go over 3 bar when the heating is put on and the pressure relief valve will need sorting as once they open, pressure relief valves will often leak...
... pressure relief valves open up when the pressure gets to 3bar or higher...
@@northwestgascertificates Thank you so much for that tutorial very helpful for fully understanding some boiler functions.
Great video. What is that spray called you sprayed on the valve to check for leaks?
It is rothenberger leak detection fluid. You can use a bit of fairy liquid though as well...
Diluted fairy liquid or pure?
Diluted. Just to make sure it is not letting any air out. It will bubble a bit if it is leaking..
@@northwestgascertificates thank you so much, appreciate the prompt response
Nice
What pump is that ?
Regin hand pump👍
Is regin hand pump good? Worth it? Im thinking about buy one to make it easier to store it in tool bag rather than carrying big bicycle pump.@northwestgascertificates
Worth mentioning about leaving on boiler during dropping the pressure and make sure it shows f22, or the pressure sensor would need changing.
Good video bud, but please stop chewing gum in my ears
🤣🤣
...think id just had my tea 🤦♂️
Haha that’s worse