Ideal logic + combi boiler pressure zero suddenly

[Hoppy42]

Hi all,
We've recently moved home a couple of months back and the boiler as titled has been working fine until the early hours of Wednesday morning when I heard the system draining and went down to the boiler and it had zero pressure. I went to top it up and after 20 seconds the gauge hadn't moved. So I thought I'll use the home emergency rather than causing more of a problem. The guy comes out today with a terrible attitude. Treats me like a fool, doesn't look at boiler. Tops pressure up although took longer than I'd given it. 8 hours later, pressure back to zero. I'm making them come out again and this time I hope they take a proper look. Any ideas in the meantime. Its clearly not something that has been a long term decline in pressure as its lost it in 8 hours today. Many thanks.

 

[gas112]

First things first have you walked around the system to see if any obvious leaks around the rads or staining on ceilings or walls with hidden pipes ?
Also check blow off pipe from boiler outside

 

[Hoppy42]

Thanks gas112. I have yes. Can't see anything.

 

[gas112]

Logics had a batch of shyte heat exchangers that leaked like a sieve the water would go down the condense pipe without you seeing it .
You could pressure it up to 3 and then pull condense pipe out of bottom of boiler if enough play and see if water is coming out of boiler that would confirm it

 

[Hoppy42]

I could hear something coming out of boiler, and drain outside house from boiler was wet on the cover so could be that.

 

[terryplumb]

Top boiler pressure up to 1 bar. Turn on c/ heating and see if pressure rises upto around 3 bar after 1 hour.
Show us a pic of what you refer to as the " drain outside house for boiler".