UFH Stone cold

[Cold fish]

Hello, just bought a new house in December, UFH gas boiler on ground floor. Open plan living area. Thermostat set on max (26), room temp is 16. Just paid extra £500 for extra accelerator pump. Still floor is stone cold, except one third of kitchen floor. Previous owners had system flushed 6 months ago. Any suggestions would be much appreciated, is ruining life in the
new house as can't sit downstairs !

 

[Cold fish]

It is upside down. Some going out have little red caps, some don't. Silver pipe leads to where he has put the extra pump.

 

[Dannypipe]

I am no expert, could not really explain technically. It is just next to all the blue pipes that go off into the living room etc. I can hear it is working but does not feel boiling hot. Plumber said it would definitely solve the cold problem but 24 hours later still 16 degrees.

Have you tried calling the plumber up and telling him that the pump hasn't done the trick? He may have missed something. Dodgy actuators, or an airlock.

You say one circuit is working, which could account for your 40Flow and 30 Return. The other circuits might be stone cold simply as they're airlocked.

I'd call the plumber back.

 

[snowhead]

They are manually balanced zones, not individually controlled as would be done nowadays.
Has the whole system been balanced recently?

Each zone needs disconnecting and proving good flow thro' it.

 

[migoplumber]

so the white heads on the bottom manifold control the on off to each individual zone.
cant see any wires going into them tho. so your stat could be controlling a motorized valve. but that would be an unusual set up. generally each individual room stat would be connected to one of them white actuators.
cant see the pump on system. and there is no bypass shown, so something amiss.
unscrew/take off the white caps and see what happens. you should have a flow into the floor

 

[Cold fish]

Thanks, I will do Monday morning. Just worried i bought a house with a dodgy heating system. Thanks for all your tips. Have a nice weekend.