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PostPosted: Mon Jul 24, 2017 8:17 pm 
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Hi,

I have a Vaillant boiler and since a few days back I don't have any hot water. I had the f22 issue with the boiler but I fixed that so the bar is now around 1.7 but it still says f22.

Any suggestions what I could do?

Thanks,

Henrik


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PostPosted: Mon Jul 24, 2017 9:52 pm 
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Is that 1.7 on the gauge or digital display?

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www.drlgas.co.uk


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PostPosted: Mon Jul 24, 2017 10:26 pm 
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On the gauge. Digital display says f22


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PostPosted: Tue Jul 25, 2017 8:11 am 
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If you press the '-' button under the display, what does it read?

It could be that the water pressure sensor is faulty, very common on these, but usually gives an F75 code.

Also a chance that the gauge is blocked and reading incorrectly.

Does the gauge needle move if you drain the boiler?

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PostPosted: Tue Jul 25, 2017 9:30 am 
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Nothing happens when I press "-"

The gauge needle did move, it used to be at 0.7 but now steady around 1.7-1.8

Thanks


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PostPosted: Tue Jul 25, 2017 4:56 pm 
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Sounds like it will have to have someone in front of it to investigate it.

Have you tried over pressurising it to around 2.5 on the gauge and see what happens?

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PostPosted: Tue Jul 25, 2017 5:08 pm 
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Yes, maybe I need to get it serviced.

Is it okay to pressure it to 2.5? the green field is up to 2.

Thanks for your help


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PostPosted: Tue Jul 25, 2017 8:43 pm 
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Yes, as a temporary measure to test the gauge.

If the boiler then works it will point to the gauge faulty.

If no difference, then likely the pressure sensor.

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PostPosted: Wed Jul 26, 2017 2:20 pm 
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I had a technician here this morning and it seems like it's more complicated. He is changed the circulator (I think it was called that) so nothing that I could have done.

but really appreciate your help! Thanks!


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