F22 error on Vaillant Ecotec Plus Boiler

[claire_reese]

Hi all,

I have a Vaillant Ecotec Plus 418 boiler (standard boiler, not combi), but as of this morning my heating and hot water has stopped working, and I get the error message F22.

I believe this means the pressure is low and I've looked online, and it suggest I must use valves under the boiler to repressurise. However, my boiler/pipes do not have these valves (as far as I can see).

I've included 4 photos. Photo 1 is the boiler panel, photo 2 is the underneath of the boiler, and photos 3 and 4 are in the airing cupboad.

Can anyone help or suggest anything? Thank you!

 

[oz-plumber]

None of your photos show anywhere where the system pressure can be adjusted. There must be some more pipework nearby

 

[claire_reese]

Hi oz plumber, thanks for your reply. I've looked and followed the pipework and can't see anywhere.

 

[claire_reese]

This is on the other side of the water tank at the bottom, is it anything?

 

[Gasmk1]

if its a sealed system there will be an orange/red coloured vessel with a guage near it and probably a flex hose with one or two taps this is where you need to re-pressurise the system

 

[claire_reese]

Hi Gasmk1, thank you for your reply. I cannot see anything like that. Is it possible it is in the boiler?

 

[Gasmk1]

i think your system is an open vent with the tanks in the loft so no vessel in this case
F 22 is Dry fire

Too little water in the appliance, water pressure sensor defective, cable to pump or water sensor defective, pump blocked or defective, pump output too low

possibly your pump is defective

 

[SimonG]

You got water in the loft tanks?

 

[claire_reese]

Thank you for your replies. Gasmk1 is there a way if I could know for certain that it is an open vent system? And SimonG I've just checked and yes there is water in the loft tanks.

Also just to say the boiler is a standard boiler, not a combi boiler, if that helps.

 

[Gasmk1]

if there is two tanks in the loft then it is open vent and it is more than likely the pump feel it to see if it is hot or vibrating

 

[claire_reese]

Hi Gasmk1, thanks again for your reply. Yes there are two tanks in the loft. The pump is cold and not vibrating, but I guess that is because the heating and hot water are off? Even if try to turn them on, the pump doesn't seem to change.

 

[Gasmk1]

does the valve on the 3 port motor open when calling for heat there is a lever on the side end you cant see this should be loose if its opening

 

[claire_reese]

Hi Gasmk1, not sure which valve you mean. This is the motor.

 

[Harvest Fields]

As above make sure what small tank in the loft has water inside it. Have you bled all rads until water comes out?

 

[claire_reese]

Thank you Harvest Fields for your reply. Both tanks in the loft have water inside. I have just bled all the radiators again until water came out. Sadly, still the same