Hi guys, I have a Vaillant eco tec pro 28.
Had an issue about a week ago when screen went blank.
I checked 3 amp fuse at switch.
That’s ok.
I checked internal fuse and used a multi meter to check connections. All seems good.
After leaving off for 15 minutes or so I tried again and the boiler screen came on and the boiler tried to go through its preignition but shut off after 20 seconds or so.
I noted some crustacean on the AAV which is above the pump, so I thought to check the pump.
I vented the pump. A fair amount of water was coming out . I rotated the shaft which was easy to do. The shaft could also be pushed in very slightly and on release comes back.
I then re pressured slightly.
Tried boiler but screen went blank again then waited 5 minutes and tried again and it worked till today when I have the same issue again.
This time no success at relighting.
Has anyone seen this before please.
Had an issue about a week ago when screen went blank.
I checked 3 amp fuse at switch.
That’s ok.
I checked internal fuse and used a multi meter to check connections. All seems good.
After leaving off for 15 minutes or so I tried again and the boiler screen came on and the boiler tried to go through its preignition but shut off after 20 seconds or so.
I noted some crustacean on the AAV which is above the pump, so I thought to check the pump.
I vented the pump. A fair amount of water was coming out . I rotated the shaft which was easy to do. The shaft could also be pushed in very slightly and on release comes back.
I then re pressured slightly.
Tried boiler but screen went blank again then waited 5 minutes and tried again and it worked till today when I have the same issue again.
This time no success at relighting.
Has anyone seen this before please.