Some radiators warming up on switching on the hot water

[james18]

We recently extended our house. As a result of this 6 new boilers(upstairs and downstairs)) were installed by a plumber in the extended area of the house.. We have a regular boiler i.e. tanks in the loft and a hot water tank in the air cupboard. The make of three port valve is honey well.

On switching on the heating, the old boilers work fine but boilers in the new extension don't heat up. However when hot water comes on (we have a timer, hot water comes on in the morning and in the evening), the new radiators warm up but not as warm.

Is it due to wrong piping or an issue with the valve? I must admit the plumber didn't look expert in the central heating systems, however the builder who built the extension uses him. Any advice will be welcome so that I pass it on to my builder.

 

[oz-plumber]

Your problem could be relatively simple or extremely complex.

What you need is a qualified engineer that can inspect the system and write up a report.
It will cost you, but you need the problem fixed / attended to in the very near future so that you can hold the builder and his plumber accountable.

 

[rpm]

We recently extended our house. As a result of this 6 new boilers(upstairs and downstairs)

6 new radiators ? (rather than boilers)

 

[brum]

im no expert on heating systems but it sounds like the plumber may have tapped into coil flow..brum

 

[acecharly]

sounds like a control issue...get the builder back

 

[brum]

Existing rads are fine just the new ones get warm when hot water called for i presume that they remain cold when no hot water called for..brum

 

[SimonG]

Sounds like a bigger issue than just controls. Give the original guy a chance to fix at his expense.

 

[gmartine]

im no expert on heating systems but it sounds like the plumber may have tapped into coil flow..brum

Probably builder.

 

[Pottsy44]

Sounds like new rads are fed off hot water circuit.

Water finding the quickest(easiest) way back to the boiler around the HW coil, however some flow is getting to the new radiators hence the cooler temp.

 

[Best]

Builders employ idiots to do plumbing seems to be often true.
They sneer if you suggest doing pipe work professionally.

 

[lucas121]

could be both a balancing issue and a reverse circulation issue due to poor install, or as others have said he's tee'd into the cylinder flow and returns.

Get him back but also look into getting a proper heating engineer in. Anyone worth their weight would have tested it before they left!