Hey there,

in the last 6 months a moved into a new property and changed out the central heating system from a back boiler system to a combi boiler (Valiant Ecotec). We got this replaced in spring summer months so did not come to realise this issue until now (Lovely Winter).

The Combi was installed under the stairs and all old radiators and pipe work that were in the house orginally were used. The prior tenants had radiators in an outhouse and also in agreenhouse which we got disconnected from the system. We engineer was going to replace the boiler, flush the system out and also install thermostats on the all the top floor radiators as only the bottom floor had thermostats.

No problems with the system until obviously now in the colder months i find that the heat output from the radiators in the top floor is not great (can put my hand on the top floor ones with flinching, bottom ones i would have to flinch).

Any suggestions on what the probable cause and solving of this?

Has been suggested that there may be a blockage somewhere in upstairs pipe work or boiler not getting the head required to pump the hot water upstairs??

Any information would be greatly appreciated.

Other info: hot water supply isnt an issue and there doesnt seem to be any unusual noise coming from the boiler itself.

Thanks,

JP

Could be several things.

1-balancing.
2-sludge, blocked pipes.
3-undersized pipework.
4-Boiler not commissioned.
5-pipework installation design issues.

Could do with an as fitted sketch, and more details on the system, pipe sizes etc

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I was thinking that there is not just a simple way of diagnosing the fault with the boiler. my main concern is that the house has already been redecorated and was hoping that whatever the solution to the cause was, ripping up floorboards could be excluded. I think in this case calling my Gas Engineer would be the best COA.

Many thanks

JP

I'd give you decent odds that there's a gravity circulation valve in the pipework that runs up the side of the chimney where the back boiler used to be

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I am going to give the guy a call tomorrow and will update. Working offshore i cannot be there so have to rely on my better half to relay the info to me as what was said.

Ill update when i know more

I neded up testing all the top floor radiators with a thermoeter to compare and they were within a couple of degrees as to the temperature output on the boiler. The problem therefore lies with insulation or lack there of.

Going to get the loft insulation topped up as only 50mm there at present.

Thanks for all the advice

JP