Boiler pressure dropping

Hebrews12

Hi all.  We have an Ideal Logic + combi boiler and we've had issues in the past where the pressure has dropped meaning that we don't get any hot water.  It's easy enough to fix by opening up a couple of the taps but it was a bit inconvenient.  Over the summer, we didn't have to do it so much but now I'm having to do it every day.  Any ideas what's going on?  I'll get a heating engineer out if I need to but if there's something I can do that would be great. Thanks for reading. 

southcoastrgi

Internal leak on the main hex, logics are renowned for this
prv passing, tie a plastic bag over the pipe that sticks out the wall & see if you get water in it
leak on the heating system, check pipes & valves for any weeps 

Hebrews12

southcoastrgi said:

Internal leak on the main hex, logics are renowned for this
prv passing, tie a plastic bag over the pipe that sticks out the wall & see if you get water in it
leak on the heating system, check pipes & valves for any weeps 

Thanks for this.  So if water does appear in the bag, I'm assuming this isn't something I can fix myself but need a heating engineer right?

SameOldRoundabout

A leak is most likely. I had a leak in an old house of mine, I was topping the boiler up most days before discovering a radiator was weeping into the floor below, never wet enough to show until it made a wet patch on the ceiling below. Check all your pipes and ceilings for any wetness. 

Jeepers_Creepers

Note the system pressure when cold (after you've topped it up - presumably around 1 bar?) and then record what happens when you turn on your CH. Monitor it for a good 15 minutes until rads a fully hot.

Report back.