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I have a Vaillant Ecotec 837. There was a (F22) dry flame so…

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Hi there, I have a...
Hi there, I have a Vaillant Ecotec 837.There was a (F22) dry flame so I opened the valves, but I had the system off (first mistake) so water started leaking out of the bottom of the unit. When it dried up, I bled a radiator to bring the pressure down to 2.0. There was an F62 error message so I reset it and it seemed fine.Now whenever you use hot water, the pressure goes up. It is currently at 3.5 and reaching red on the pressure gauge. I turned the unit off for now, but need advice.
Submitted: 9 months ago.Category: UK Plumbing
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Answered in 1 day by:
10/11/2017
Plumber: Brian, Plumber replied 9 months ago
Brian
Brian, Plumber
Category: UK Plumbing
Satisfied Customers: 872
Experience: 16 yrs. experience as plumber, including full bathroom and kitchen installations.
Verified

Hi it seems like your expansion vessel has failed you need to check the pressure of the vessel with a tyre gauge and pump it up if required. usually to 1 bar. if water comes out of the valve it needs replacing.

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Customer reply replied 9 months ago
Hi, when I reset it, it all seems fine and the pressure is back at 1.5. However, if I turn on the radiators long enough the F62 message appears again. Now there are no leaks, and if I reset it, the error message disappears. What should I look out for and do I need to call someone in to check anything? We do not have a tyre gauge
Plumber: Brian, Plumber replied 9 months ago

F62 is a gas valve error.

This has nothing to do with the pressure rising.

I think you had better call an engineer asap as it looks like you have a couple of problems.

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