Vokera boiler flame not staying on

D

dodo

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My Vokera boiler is on staying on,the flame comes on fopr a second then goes off, I have tried flicking the switch on and off at the supply box outside but no luck, any ideas thanks
 
Is the water pressure very low?

If so you will need to increase the water pressure in the system - get someone who knows what they're doing!!!!
 
Water is ok, issue seems to be the same as before about 2 years back, I did get the bolier working again but issues again,
I pressed the reset buttion on the bolier and the flame lit up and all back working again but when I turned gas off and went to put back on the flame would not come on again,tried reset as before but no luck? any ideas


DerKaiser said:
Is the water pressure very low?

If so you will need to increase the water pressure in the system - get someone who knows what they're doing!!!!
Click to expand...
 
Apologies for hijacking post. But I have a pressure issue with a Vokera as well. Note I know how to increase the pressure - it is a closed system with handy valve connected to mains for topping it up. But the pressure release valve at the boiler seems very senstive (there is a valve there for pressure release somewhere, seems to be inside boiler).
So when heating comes on, it vents water after a while (increased pressure caused by hot water) and eventually turns off as presure is too low. Usually
takes a few hours - annoying, have to top it up.
Note I do not think there is a leak - have verified it is venting water in the
outlet pipe.
Plumber could not understand - added expansion vessel which made it take
longer to drop pressure (2-3 days) but otherwise did not resolve.
And bizarrely , it does not happen all the time. Has been on/off for years. I disconnected the expansion vessel 9 months ago and it just started to work. Until 2 weeks back. Somebody adjusted one of the rads and it started to drop again. By readjusting I guess I will eventually get it back working but it is weird - any ideas what is happening - is there a value for that outlet pipe and can they be faulty?
 
You are either over-pressurizing the system or the diaphram in the expansion vessel is split or some dirt has got stuck in the 3 bar safety valve.

Firstly, check the system pressure on the pressure valve. This should be checked when the system is completely cold and the pressure should be no more than 1 bar when cold.

If not the pressure, then check the expansion vessel. Tap the dry side of the vessel and see if it sounds hollow. It may seem hollow but could still be split. You may have to release the pressure from the system and check the vessel with a gauge.

Finally, check the 3 bar safety valve when the system is cold. Dry the mouth of the valve and see does it get wet again.
 
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