No water getting into system

wobzilla1

Any help is appreciated as the temperature is set to drop to -3 tonight.
I have a sealed system that we can top up straight from the mains. We were getting some work done in the house and the mains was turned off for most of a day. Last night I went out to top up the system and when I opened the valve to let water in, the pressure gauge just dropped completely. I've had the valve opened for all of today and the gauge isn't rising at all. None of the radiators are working. I've opened the little bleed valve on the burner and water comes out (although not nearly as high pressure as it should be). I've also bled the big red yolk in my second picture and I bled them pump.
The pump seems to be running as it makes a whirring sound when I power it on. Any ideas?

senorwipesalot

Check ballcock on small tank in attic is not stuck

senorwipesalot

check rotor on pump is spinning or change pump speed

ntpm

The mains being turned off shouldn't have effected your heating system.
The only reason that the pressure drops in you heating system is if the radiators system was drained or has a leak or when ever you vent radiators.

If you haven't topped up the systen in the past then the pressure reducing valve may have been opened and adjusted during initial filling but then closed off and adjustment screws closed dowed. This is to stop accidently topping up or overpressurising.

There is a small black knob on the bottom of valve, make it sure its open.
Then you may need to adjust the slotted screw on the top of the valve.
#Be carefull not to adjust this quickly... watch the pressure gauge and make sure it doesn't go much above 1.5Bar.

wobzilla1

I've tried that already. I just disconnected the pipe right in front of the valve and it's really high pressure there (flooded the place in the few seconds it took me to turn off the water). Suppose I'll get my extra duvet and my aran jumper out and ring a plumber tomorrow . Thanks anyway lads

ntpm

wobzilla1 wrote: »

I've tried that already. I just disconnected the pipe right in front of the valve and it's really high pressure there (flooded the place in the few seconds it took me to turn off the water). Suppose I'll get my extra duvet and my aran jumper out and ring a plumber tomorrow . Thanks anyway lads

There is a non return valve after the pressure gauge fed from the "Outlet" pressure reducing valve. It may be sticking??? Try tapping it.
Try opening the far left hand side of this valve.

Buford T Justice

senorwipesalot wrote: »

Check ballcock on small tank in attic is not stuck

Sealed system so no F&E Tank in the attic.

wobzilla1

Turns out that a joint under the kitchen floor came apart. Just filling the radiators up again now