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[JesterRT]

I've just come home to find no heating and no hot water, which isn't ideal after being up since 4.30am, and particularly when you've got two little'uns.

I've got a Baxi Combi 28, and from the manual I can just about work out that I need to repressurise the system as it's down to 0.5 bar.  Thing is when I open up the two refill valves there's no sound of it actually refilling and the pressure gauge doesn't budge.
There's basically three pipes disappear into the boiler, and two have an interconnecting pipe which looks to me to be the way to pressure the system.

Anyone got any ideas?  The only thing I can think of recently is that on Sunday I bled a radiator where lots of air came out - and I'm guessing that'd where the pressure went.  I'd rather not pay a plumber an hours labour plus call out charge for something really obvious.

All advice greatfully received!! 

[Welung666]

The bridge pipe is for re-pressurising the system. Shut the system off first. At one end of the pipe (normally a short flexible pipe similar to a washing machine pipe) is a non-return valve (looks like an 8mm nut), you shouldn't need to touch that end. The other end will be on the mains water supply pipe and have a lever type tap. Gently open the lever about halfway and you should hear the water flowing. Let the pressure rise to about 1.25 bar and shut the lever off. Turn the power back on to the boiler and it should fire up.

[pscocoa]

A possibility given what you say-

"Combination boilers sometimes stop working due to a drop in pressure.  Pressure can be lost in a central heating system if for example the radiators are bled, if the combi constantly looses pressure than you have a leak! This could be something as simple as a bleed valve that is not closed properly or a radiator valve that is leaking slightly, check all radiator pipes and valves for evidence of leaking.  if you find a leaking valve try to re-tighten it to stop the leak, otherwise replace the valve!"

[aaronjb]

My boiler (a GlowWorm Flexicom) is like the OPs - two plastic tap handles, one on each end of the filling loop and to fill you open both (cold water side first) and then shut them both off (in the opposite order)

The manual for what I think is your boiler makes yours sound similar, but says the filling loop should be removed after filling.. is this your boiler manual?
http://www.baxi.co.uk/docs/Baxi_Duo-tec_Combi_HE_User_Instructions.pdf

[JesterRT]

Well I think I'm getting somewhere as I've opened them up and left them for a few minutes.  The pressure needle is creeping slowly up.  You'd need time lapse photography to see it, but it's definitely headed in the right direction.

Thinking back to when the plumbers installed it (about 15 months ago) we had to wait forages and ages then for the thing to pressure up.

Good things come to those who wait!  Hopefully heat in my case!

Thanks for the advice!

[redelitev6]

Well I think I'm getting somewhere as I've opened them up and left them for a few minutes.  The pressure needle is creeping slowly up.  You'd need time lapse photography to see it, but it's definitely headed in the right direction.

Thinking back to when the plumbers installed it (about 15 months ago) we had to wait forages and ages then for the thing to pressure up.

Good things come to those who wait!  Hopefully heat in my case!

Thanks for the advice!

If it's taking that long to fill up, might be a major problem somewhere , double check for leaks around the house

[Plomien]

may also be worth bleeding the rads while filling it it may speed it up a bit