Hi there, hoping you can give me some advice in case I can attempt to fix it myself first?
I have a Vokera Linea 24 combi boiler and over the past couple of weeks the pressure drops to 0 and I have to reset it - meaning no hot water/heating.
Once reset I open valve and backfill the pressure to between 1 and 2 and it kicks in ok but maybe later on same day or next day I've to do the same again.
I've checked for leaks and found none. Checked for air in the radiators and again no air. If I kick in the temperature to quite high, all the radiators boost up easily. I've also switched all the radiators off and then turned them on one-by-one and found no problems or unfamiliar noises.
Anything else I can do before I have to call in a plumber? Help please?
Check your PRV outlet outside, there may be water escaping outside from this. PRV = pressure refief valve goes to outside at same position as bolier.
If water present there = faulty PRV = get a man in.
take the pressure of the sealed system up to 1bar. Close off the flow and return isolation valves under the boiler. If the pressure indicator drops, the leak is in the boiler, if it doesn't drop, the leak is on the system, probably a weeping nut on a rad - check thoroughly, underfloorboards etc...
If it is the boiler that is leaking check things like:
Expansion vessel: may need recharging, touch the valve and if you get a wet finger, it will need pumping up or replacing
Pressure release valve: Are you getting a drip to outside?
heat exchanger: you'd probably already know if this was leaking.
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