some radiators dont heat up

Postby hp123 » Fri Nov 21, 2008 9:29 am

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?
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Simply Build It

Postby htg engineer » Fri Nov 21, 2008 2:49 pm

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

htg engineer
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Postby daltonadam2000 » Sat Nov 22, 2008 1:06 pm

what system have you got ie
combination boiler
system boiler (do u have a cylinder)
microbore (pipe diamter 10 mill or less )
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Postby hp123 » Tue Nov 25, 2008 4:50 pm

i have a vaillant ecotec plus 637 boiler with a 310 litre unistor cylinder, the pump is on speed 11 (highest i think).
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Postby Steve the gas » Wed Nov 26, 2008 5:33 am


Try balancing the system!!
Steve the gas
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