some radiators dont heat up Help and information on all topics relating to your central heating, air conditioning and ventilation issues.

[hp123]

hi, wondering if someone can help, i have recently bought a house, the central heating system (boiler & radiators and pipework) is six months old, but some of the downstairs radiators dont heat up, tried balancing, but even then they only heat up slightly, they do come on if i tun the upstairs rad off, as soon as i turn them back on we have the same problem. any suggestions?

[htg engineer]

Try turning pump speed up, if it's alread on III then the pump may need replacing.


htg

[daltonadam2000]

what system have you got ie
combination boiler
system boiler (do u have a cylinder)
microbore (pipe diamter 10 mill or less )

[hp123]

i have a vaillant ecotec plus 637 boiler with a 310 litre unistor cylinder, the pump is on speed 11 (highest i think).

[Steve the gas]

Hi,

Try balancing the system!!