andrew smith asked ... 2009 fiesta 1388 cc titainum?    |    Eric asked ... Strimmer fuel line?    |    Frank asked ... Working fine. No cold air?    |    c.m.brown asked ... Replace chuck on aeg power drill sb2e 700r?    |    tom dimmock asked ... How can i mend the lid on russell hobbs elec?    |    Click here to ask your question

no heat to radiators unless hot water on?

suddenly my radiators will not get hot unless the hot water is switched on as well.
David Morris, January 2010
There's a valve - it directs water to the rads or to the hot water system and sometimes to both - sometimes they get stuck. Diverter Valve / Mid position Valve...

http://www.centralheating-diy.co.uk/images/3_port.jpg

Your boiler engineer will soon sort it out for you...

Good luck...

Peccavi, January 2010