New boiler installed but radiators cold downstairs

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Just had a new Vaillant ecoFIT pure 418 boiler installed today.
3 radiators upstairs and 2 downstairs.
When the heating is on, the upstairs radiators are red hot and the ones downstairs are cold.

If I turn off the ones upstairs, the ones downstairs come on. I bled the downstairs ones just in case.

I'd like to understand what the issue could be when I chase up the boiler company tomorrow and would appreciate some advice please.

By the way, would I expect the company to fill any holes? At present I have an 8 inch by 1.5 inch hole through the wall into the cavity above the boiler?
 
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1. Hot / cold radiators are probably a balancing issue. Plenty of threads and internet information on how to do this. If they weren't balanced when the new boiler was installed, then not the installers issue, although anyone worth their salt would make sure the system was working satisfactorily before handing over.
2. When bleeding radiators, do it with the system off. Ideally, run system, turn off, wait 15 minutes or so, then bleed. Bleed downstairs first, then upstairs.
3. I would expect the installers to fill any holes left, provided these were caused by removal of the old boiler or installation of the new. If the hole goes right through the wall, and exits within 150 mm of the new boiler's flue, then is probably breaks the installation instructions and must be dealt with.
 
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Bled the radiators as advised and no good, so must be a balancing issue.
Pre change of boiler they were fine.

This is why I hate getting work done!
 
Just had a call with the boiler people.
They suggested thermostat valves!

They said that some of the valves need turning down and some up and this will sort out the issue.
That's not really scientific is it? Having looked around this site, balancing the radiators needs a thermometer.
 
Having looked around this site, balancing the radiators needs a thermometer.
No it doesn't.

Start by turning all the lockshields to "off" then open half a turn (the adjustment is all in the first turn or so)
And all the TRVs full on

Then adjust the lockshields by no more than a quarter turn in half an hour.

You want the Flow side to be "too hot to hold" and the return to be "too hot to hold for long"
 
They said that some of the valves need turning down and some up and this will sort out the issue.
That's not really scientific is it? Having looked around this site, balancing the radiators needs a thermometer.
Yep that is what it needs, and no if you are experienced no need for a thermometer
 
Until the boiler people come, I have adjusted the valves on each radiator so the upstairs ones are just on and the one in the main room downstairs is on full.

When they arrive I'll ask them to set the radiators up correctly. I imagine they'll just want to get away with the quickest method, probably the same as I have done.
 
Balancing is not done by opening the cold ones, but by closing down the hot ones. This prevents all the hot water circulating through the easiest route, so some of is forced to go through the neglected radiators.
 
Boiler guy never turned up so I'll be chasing tomorrow.

Thank you to all members who posted. Its much appreciated
 
At this point in time I think Boilerplan are crap.
Despite several emails they've not been back to sort the radiators out or the thermostat.

I'm really too busy in the week to chase them up but I will do.

Really don't know why they didn't put the filter in the airing cupboard. I'm sure they could have made a neater job of the pipework too.
 

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