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Mend Heating Radiator Problem

Radiator problem?

Can anyone tell me why when my gas ch system is set to hot water only the upstairs radiators come on too (this hasn't always been the case ) ?? Thanks.

Steve
February 2013
Heating, Home Heating SystemsHeating Radiator Problem
Yep that's it thanks you're a star

Steve
February 2013
There's a motorised valve - it can direct the heated water to taps or radiators or - in the middle position - to both.

Sometimes the valve gets stuck.

http://www.wickes.co.uk/3-way-mid-position-valve/invt/443033/

Peccavi
February 2013

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Radiators Coming On - Hot Water Mode