vent radiator

[gregjaniec]

hi .i had a combi boiler installed three months. since then i have to vent my hall radiator every week. its a single storey with 6 rads.whats causing the one rad to be vented so frequently? cheers

 

[seco services]

air getting in needs to come out.

 

[gregjaniec]

but why is air getting in? and why only one rad?

 

[methaneman75]

that rad may be just slightly higher than the rest therefore the air already in the system is being depositited in this rad.
Another is corrosion in pipework causing (gassing) try lighting vent while you are bleeding the rad, this will tell you if this is the case or not, dont worry you wont blow yourself up , it will produce a small flame if it is gassing ,

 

[Goldspoon]

Another is corrosion in pipework causing (gassing) try lighting vent while you are bleeding the rad, this will tell you if this is the case or not, dont worry you wont blow yourself up , it will produce a small flame if it is gassing ,

And if it is it may be because you have no inhibitor in the system (Google Fernox Inhibitor)

 

[TheBoilerMan]

was the combi an upgrade from a conventional open vented system?
Check for leaks and get installer back to rectify.

 

[namsag]

Combi usually means sealed system so you should not be bleeding it this regularly, if you are you must also having to be topping it up with fresh water.
This would indicate you have a leak somewhere .

 

[bengasman]

does the pressure go up a lot when your turn the heating on?