The Vaillant boiler has started to periodically turn off with an F.28 error. It turns off about 4-5 times a day and needs to be restarted. It cannot ignite the flame on the first attempt, only on the second or third attempt. I called a technician, and he said that the pressure is below normal. I understand that he was referring to the water pressure. He did something and said that it should work now, but the boiler continues to turn off. However, the boiler does not turn off at night and works all night. Can you please suggest what it could be? What should I ask the technician to pay attention to during his next visit?
If the red LED is lit, it indicates a fault in the system, ie due to incorrect installation of the unit. Try disconnecting the ground from the electrical board. Sometimes a problem can be fixed that way.
@@geigerzvonimir Thank you for your reply but unfortunately it didn't work. Once I turn back on the grid in the house the boiler tries to start but ends up showing f28 again. I guess I'll be calling maintenance tomorrow. Hopefully it won't be expensive. :-/
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Absolute legend!! My missus is starting a new job tomorrow and was fuming she wasn't going to be able to have a shower. Many thanks
I'm glad I could help.
Thank you so much for the very clear explanation!
Thank you very much indeed.. 👏👏👏
Great tips, thank you !!
Great video. Thank you!!
Worked for me, tnx 😊
I'm glad I helped
use a brass brush for the elektrodes. to be honest just pushing the button should be enough for f28
very thanks
The Vaillant boiler has started to periodically turn off with an F.28 error. It turns off about 4-5 times a day and needs to be restarted. It cannot ignite the flame on the first attempt, only on the second or third attempt. I called a technician, and he said that the pressure is below normal. I understand that he was referring to the water pressure. He did something and said that it should work now, but the boiler continues to turn off. However, the boiler does not turn off at night and works all night. Can you please suggest what it could be? What should I ask the technician to pay attention to during his next visit?
So how you fixed it?
The master replaced the injectors
For some reason after I press the button either short or longer, nothing happens. The boiler doesn't restart. Still F28 and red light
If the red LED is lit, it indicates a fault in the system, ie due to incorrect installation of the unit. Try disconnecting the ground from the electrical board. Sometimes a problem can be fixed that way.
@@geigerzvonimir Thank you for your reply but unfortunately it didn't work. Once I turn back on the grid in the house the boiler tries to start but ends up showing f28 again. I guess I'll be calling maintenance tomorrow. Hopefully it won't be expensive. :-/
I have an update on this issue: unfortunately the fault was in the gas section. A new one was 500 euros right out of my pocket. ouch.