heatline combi boiler

[curlyperm11]

hi - i have the above combi boiler and the guage should always be (on a normal clock say) between 10 and midday - but mine is now on (on a normal clock) 2 -3 and in the RED!!!! i just dont know what to do to get it back down and am panicking have tried everything turning it off and then on up the radiators off the water etc etc please help? i did go online but they wont answer unless you give credit card details and charge £17 asap thanks in advance

[buildersmate]

If the gauge has numbers on it, it should read around 1. Generally if it is a gauge that reads up to 4 bars maximum, '1' is at 10 o'clock but it's the number that is important, not the position in relation to a clockface. However, agreed it is too high.

The most likely reason for the pressure increasing is that the 'filling loop' is not fully disconnected from the cold water supply and tiny amounts of fresh water are entering the system over time. Fortunately that is easy to put right - find the manual, identify the filling loop and check the filling valves (2) are completely off. Normally the filling loop is completely disconnected from the cold water supply except when being used to refill (which is only necessary when pressure has dropped below 1).
There is no need to panic about excessive pressure - it is not dangerous because there is a pressure relief valve. This normally kicks in if the pressure goes above 4 bar (and water leaks from the overflow valve outside somewhere - it this happening?). However I agree that you do need to get to the bottom of why it is increasing.
As a short term measure to get the pressure down, you could bleed a little water from one rad - it doesn't matter which - to allow you the necessary time to work out what is happening without having to pay silly rates to put right what is probably a simple issue.
Report back when you have tried it - there are other things that could be wrong.

[gucciman]

agree with builders mate on the filling loop, check that first.

Could also be a problem with the expansion vessel, have you had to top up the water in the boiler regularly?

[curlyperm11]

thank you Sooooo much (both) i eventually got Dave the plumber and you were exactly right i - when previously had relseased the pressure - hadnt turned tap tight enough - hence slightly dripping water over a period of time caused problem, so he unscewed bottom of boiler, flicked a switch - hey presto!!! but you reassured me that it wouldnt 'blow-up' and i thank you for that!!!! xx