Worcester Bosch combi boiler

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Hi, I think I may have one or two leaks from radiators in the house. I just looked at the boiler and noticed that the water pressure is on 0 again. I only repressurised it about 2 weeks ago. The radiators were working earlier today but are cool now.

What can I do until I can afford to get a plumber to look at my radiators? Can't afford for him to come and repair/replace at the moment. Should I just leave the boiler exactly as it is or should I switch the electrical supply to it off?

Extra bit of info

Just tried to repressure it again and when I checked the boiler it was on 0 again.

I have a fairly new worcester bosch and mine too lost pressure. I raised the pressure again myself. You need a white key, which should be fixed somewhere on the boiler (it is detachable) and then google how to do it. If I can do it, I am sure anyone can.

O sorry just re-read your second message - you already did this?

Yes, I filled again this evening and a few minutes later it was empty again!

go outside the house and look at the vent pipe. It wil most likely be a 15mm copper pipe bent back on itself in a "U" shape so it squirts back atr the wall (to avoid spraying hot water on passers-by).

Is the wall around it wet, or are there signs it has been dripping?

You can turn off the boiler when it is low pressure, it won't be able to start but it might try.

Next time you pressurise it, don't start the boiler. Leave it cold overnight. Observe the pressure immediately after you fill it, and after an hour, and after it has been left cold overnight. Then turn it on and observe the pressure gause. What's the highest it goes to when it gets hot? Write the date, time and pressure down, and whether that's cold or hot, also the ti9me and date of your attempts to repressurise it.

Go and look at the vent pipe during and immediately after repressurising as well.

How old are your radiators?

Do any of the radiator pipes run in a concrete floor?

p.s.

the vent pipe usually comes out of the back or bottom of the boiler, and turns to go straight through the wall. It does not have a manual valve handle on it, like some of the other pipes.

The vent pipe might go into a "tundish" indoors close to the boiler and connect into a drainpipe, but you would hear (and possibly see) it squirting out, in that case.

Or do you already know where the leak is?

You need @PigletJohn

Thanks PigletJohn. I'll do all those pressure things tomorrow.

The radiators are at least 20 years old, they were here when I moved in. And yes, the sitting room floor is concrete and so I guess the pipes for that room's radiator must be under the floor.