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Vaillant eco TEC boiler F22 problem?

i have a vaillant boiler and just now i used the kitchen tap water and there is not hot water. And, the boiler is flashing F.22 and i don't know what this means! and the pressure has dropped to 0.2 and i have read the installation booklet, but it doesn't help me. How to i fix this problem?? thanks

joel, January 2009

home Fix label Heating label_important Home Heating Systems category Vaillantdone

I have not got no heating and no hot water I am on F22 and I am on 1bar I don't know know what to do
It's very cold in my flat

Natasha, October 2016

Just wanted to thank everyone who posted the answers below, especially the video from crazy Dave. I woke up to a cold house and f22 fault code but was able to fix quickly and easily.

Rich, November 2015

Hi
I have a valliant ecotec plus and im getting f22 fault. The system is not empty the only way I can clear is to top up sestem for just 1 sec then I get a high pressure reading within minutes of stating up heating. If I only use the hot water the f22 will not come up. Do you think I have a faulty pressure sensor??
rgds

mick, October 2015

Can't thank you enough. I had F22 flashing, and pressure at 0.2 this morning. Water & radiators were FREEZING! Followed the advice, turned the 2 keys, (mine are on LHS and centre) and hey presto, it's all working again. Thanks all!

Mazza, February 2015

had no idea what to do and didnt fancy sitting with kids without heating in the dead of winter. thanks to this site heating is back on x

lynne, December 2014

Hello, we have F22 error as well , but we still have hot water, just the heating is gone. Any suggestion on this issue will be much appreciated!!

bo, March 2014

Brilliant advice, thanks! Water pressure was down to 0.4, but I turned the left key, then the right one and could hear the water refilling. After a few seconds the boiler restarted by itself. Couldn't have been simpler.

Was cold, now warm, December 2013

Thanks so much for advice everyone. Husband away and I felt the panic rising at no heating. Turned the tsp on, let in some water and bingo :)

Lindsay, November 2013

hi f22 is my problem I try to put water its happen nothing

haris, October 2013

F28 code on my boiler nothing works even though it fires up then shuts off and code appear

Sandy, October 2013

I just turned on my hot water tap and no hot water. Checked boiler its a EcoTec plus 831 and error code said f.22... I looked up all the advice here and went to my boiler. Opened left grey tap, then right hand tap waited for water to fill in to bar 2.9 then turned off. I now have hot water and heating... Thank you so much guys you saved me from having a break down.. This is brilliant advice and very helpful... So happy! .

Ruby, September 2013

how can i rest my boiler now as had the F22 flashing as pressure was low but had pressued it ,but now showing 28 flashing on screen help?

Harpal, December 2012

Thanks so much to this site !
I bled my radiators and had this error code F.22.No heating or hot water, but water still running.
Looked into the installation booklet and saw error code F.22 Dry Ice. Turned on valves to re set. Now have heating but NO water at all from hot tap. Pressure bar is 3.2 have i filled it too much and how do i lower it ?
Please help !

Dawny don't do boilers aargh !, November 2012

Got the pressure back up boiler starts temp rises very quickly then turns off and temp drop[s as quickly NO hot water or heating- any advice?

Rob, November 2012

Just another big thank you! New boiler installed on the 24th, got the error code on the 26th and no hot water or heating. It's a council house so called the council who fixed it while I was out (house getting a full renovation, various workmen in all day)

Found no hot water or heating again today, so googled the fault code and found this site. Two little taps turned, boiler refilled and I'm now sat lovely and cozy with hot water for a bath later on tonight.

(also a radiator in the kitchen that isn't heating up so I think I know whats causing the problem lol)

Helen, September 2012

Thankyou so much, getting up at 5:30am to find there is no water was like arrgghhh. Fixed in in 2 mins after reading this :)

Paul, August 2012

Just wanted to say a big THANK YOU to this website! With no hot water this morning and F22 flashing I thought 'oh no' but you have saved me worry and money and I am very happy. So easy to remedy, Cheers

Linda in Salisbury, UK, July 2012

Had exactly same problem, F22 error. Refilled boiler using taps under boiler to suggested 10 to 2 position, reset electrics by switching off on wall for 3 mins, sorted and all in the middle of a bank holiday weekend. A fortune saved on plumbers call out fee's, most excellent. Thanks very much for this great site.

The Linn's, June 2012

I had this problem a few months back, and thanks to advice on here I remedied it immediately.
Now, it's happened again, and despite doing the same I can never get the green light to come on, it stays as orange for a while (as I keep having to raise the pressure), then if left unattended it fails and goes to red.

Plus I only have one tap underneath the boiler, whereas most comments relate to there being two. Is this possible?

Rich, June 2012

F22 error code on display phoned the boiler man but gone to answer phone no hot water and no heating, went on net and found this web site. Read some of the anwers, many thanks for all the info on this site turned left tap first then right tap to let water into system bar went up and now have hot water and heating once again thanks for info saved my money and my wife thinks i great for fixing the boiler have not yet told her it was on the net

Troy Anderson, May 2012

Worked for me

Paul dobb, May 2012

Our kitchen rad was put back on the wall yesterday. Got home to find no hot water. Went to the boiler and found a f22 which we had before when the system was first installed. I opened the right hand valve as the left valve had been left open by the plumber not sure why, but the pressure dial didn't move as before, usually showing 10 o'clock. Enough pressure went into the system as the water is now on but the overflow started dripping. Since tried to fill the system but no success. Cant hear any water filling the system as normal... Any ideas? Thanks

Sarah Connolly, April 2012

Brill!

Got tired of waiting for the landlord to come around (24hr emergency turnaround my left butt).

Watched this, did it, works!

Craig Morley, March 2012

the loss of pressure can be two fold: External ~ when water utility board have carried out some repaire on the road/ estate etc, has this water supply reinstated? if not you get F22; Internal~ heating circuit has a leak allowing air into the heating circuit, causing air lock> blead ALL radiators & replace lost water by opening the two valves at bottom of boiler as described in earlier link.

NP1974NP, January 2012

wot does f22 mean

john, November 2011

Thank-you the two tap like valves worked, when all the other things failed.

acr, October 2011

check out this video just saved me £200

http://www.youtube.com/watch?v=ipwRcmPaJcw

simple but brilliant hot water is back on!

crazy Dave, September 2011

Oh my gosh! I was an incipient heart-attack victim when my Valliant ecoTEC boiler had an F.22 error just now. Your site is worth its weight in gold.

I found the two valves underneath and turned each in turn but nothing happened.

Thank goodness for the comment above which said to open the left valve, then the right one! That was the answer to raise the pressure bar. I closed both and now I have hot water.

You guys are fantastic!

Shazzbot, July 2011

f22 can be more than low preasure if you keep putting water at regular intervals then the heating will fill with rust and need powerflushing better to fix any leaks on the system
can also be blocked filter or slow pump or thermister out of sink

gmgas, April 2011

remember that when pressure is low the system is losing it somewhere , either leak on system or fault with boiler,should never really need to alter pressure unless rads have been bled,

james kerr gas eng,, February 2011

turn on the tap under your boiler for a few seconds. you will hear water filing it in. it should restart automatically, it has something to do with pressure dropping for some complicated boiler related reason.

great tip - worked for me! it would have been a very stressful morning otherwise - THANK YOU!

Ellie, February 2011

Fab advice, our pressure had gone to 0 followed the instructions on this page and its started again.
Thanks

Michelle, January 2011

I add my heartfelt thanks!! Just came down to find the boiler showing F22 and 0.2 pressure, had no idea what was wrong. Turned the tap as you suggested and within 30 seconds the heating was on again. Brilliant. Thing is, there is a leaking radiator, but the leak is tiny... it has only lost a small glassful of water so far...

Bill, December 2010

Just done what you send and boiler back on seeing its -1 out side i am very very grateful. Presure is 2.5 now is that right?

L C, December 2010

my boiler is doing the same, to get heating i have to fill the boiler with water, once the heating goes off the pressure drops and f22 appears, i have to do this everyday!! i have had 2 plumbers out now, both charged me for their services and its still not fixed, there are no radiators leaking and i cant see any leak coming from the actual boiler, any suggestions? is it definately a leak somewhere? i thought there was alot of water coming out the overflo pipe but ive been told this is normal?! please any suggestions are welcome!!!

Zoe, November 2010

Thank you so much - solved my problem straight away :)

EC, November 2010

The boiler losesspressure every three hours. There are nosigns of any pipes leadking anywhere, Has any one come across this problem?

zjw, October 2010

Absolutely spot on solution. Saved me calling out an engineer. Many Thanks

Bill Poster, October 2010

Same problem, F.22...just want to say THANKS for info becouse it fiex problem in less than a minute and saved me alot of mone on technicions that would rip my wallet apart :D
Thanks from Croatia!

Stjepan, October 2010

Brill thanks sorted my boiler for me

Russ, October 2010

For people having the F22 issue with the EcoTech Plus, under the boiler you will find two tap heads. Open both slowly and only part way. You will hear water begin to fill the boiler. Once the pressure has refilled, close the taps and the boiler will automaticaly restart.

All boilers slowly loses water and pressure naturaly through operation so do require filling occasionaly but keep an eye of the pressure gauge over the next few days to a week or so after filling, as if the pressure drops too low again in such a short period of time, it would indicate a leak somewhere in the system. If this happens, switch off the boiler and call out registered engineer for maintenance. :)

Simon Wilson, August 2010

I also checked the manual and despite explaining that the system must be filled with water again, it does not tell you how. Googled it, came across this website, and back in business after a few minutes. Thanks for the answers.

Paul, May 2010

thank you all so much for your help, i checked the manual, but to no avail, the manual does not help to solve the problem of F22, so after searching on the net, i stumbled across this site, read your answers and fixed the problem, woohoo, was made up with me little self, ta very much everyone, it was much appreciated.

jayne, April 2010

I had an F22 problem, read the handbook to see what it meant(dry fire, lack of pressure) and then googled for a solution. I followed the advice and opened the 2 taps underneath, and monitored the pressure till it had risen to 1.5 then closed the taps. The boiler kicked in straight away and heat and hot water returned pretty quickly.

John, March 2010

I have had the f22 and know how to solve it BUT I have had 3 in a week and the boiler is less than 12 months old. I am going to contact the installer. Any likely reason? Is it leaking somewhere?

Dave Glover, February 2010

Excellent, thanks for this as it helped us out on the ecotec plus. Turn both valves on, let it fill up for not for long and then use the minus button to check the pressure level then it's all good.

Stevie, February 2010

Great Thanks, Just a little tip I have two taps underneath the one on the left allows water to come from the mains up to the boiler the one on the right allows the water to enter the boiler, so open the tap on the left first then the one on the right for a little while turn the boiler on and see how far the pressure has raised then turn off and repeat until you reach the desired pressure,
I just hope our pressure hadn't dropped for any more sinister reason.....
Jan 2010

Ben, January 2010

I have the same problem with my boiler and after looking in the book to see the problem, I have no water pressure at all. My boiler has a cover underneath which I have removed, but I can not see any keys or small screwheads on the right. There is one that says cold water mains but it will only move to horizontal from vertical. My model is an Ecotech 824. Any ideas ?????

Sarah, September 2009

yeah i just read it and it was the case low pressure.my boiler had two key i ve turned them wait about a minute to fill the water (stops fillin after a while), and done.pressure now about 2.5 bar.thanks alot guys.after having a cold shower, i had to do smthing about it.

mc gyver, August 2009

i have just had this problem and it turned out to be a pipe under one of the radiators leaking water....this caused the water to empty from the system which i had to top up twice a day.....i take it you have refilled the boiler with the keys underneath....if not thats maybe all its needs.....this happens sometimes for no reason ....the plumber that fixed our pipe at first thought we may have overfilled the boiler and blew some sort of valve....this would result in a small amount of water running down the outside wall coming from the vent....maybe its worth checking that as well

sue....a non plumber, January 2009

I have A Vaillant Thermo Compact which is constantly tripping out and needing a reset. It too shows an F22 fault code. The pressure gauge is showing adequate pressure between 1.5 & 2 Bar. Could the meter be wrong or could it be losing pressure somewhere else?

Ross Adams, January 2009

if you've read the book then it would have told you its a low pressure fault code so you need to re pressure system and again this is in the book but here goes............there should be a little L shaped key sticking down underneath the right hand side of the boiler you need to turn this (whatever way it wants to go) 90 deg and you should hear water flowing into boiler and pressure gauge should rise stop when its at 1.5 bar, if the key is missing (which is often the case) then a small flat bladed screwdriver will take its place but a good look underneath with a torch might be a good idea at this point so you can see where to put it !

mark the gay boiler man, January 2009

link Click here to see other fixes for Vaillant.