baxi 105e pressure problems

[millsyboy]

Hi

can anyone help me please my boiler is driving me mad.

my boiler is now 2 years old and has strated going noisy about 6 months

ago. i cheked the pressure gauge and it was showing 0 bar so i topped it

up too 1 bar.I found that the air bleed valve too be leaking and had it

replaced with is no longer leaking , but the pressure is still going down

too 0bar after a day.There r no leaks anywhere on the system that can be

seen can it be an expansion vesal problem. please can anyone help as i

am lossing my mind

many thanks

 

[croydoncorgi]

To go from 1 Bar to 0 Bar on a smallish system, you must have lost AT LEAST 2 litres of water to somewhere.
Check the boiler Emergency Discharge pipe (outside, somewhere on the wall below the flue terminal). If it's wet or dripping, likely that's where it went. Otherwise, carry on looking. Wet rad valves, marks on ceilings, damp smells in rooms with pipes below floors, etc.

If the ED is leaking you'll need to replace (or at least get cleaned up) the boiler Pressure Relief Valve. This is a calibrated safety device. If you don't know what you're doing, Get Someone In.