faulty heating

[brian555]

help!
still on gas back boiler water gets hot ok but boiler will not fire up for heating?
have replaced thermostat in hall with a new one the same drayton rts1.
replaced timer as well danfoss fp715 si.
boiler still wont fire up for heating even if i try 1 hour override .
pump seems to work ok ? anybody any ideas thanks.....

 

[tomy]

three way valve usually by the cylinder is faulty , probably the motor inside has gone . as a temp solution there is usually a manual lever on it which will get the heating working untill you can swap it

 

[brian555]

will try that thanks.

 

[MANDATE]

probably the motor inside has gone . as a temp solution there is usually a manual lever on it which will get the heating working untill you can swap it

Tomy! can't see how using the lever will get the heating working long enough to do anything, If valve is put and held in mid position, it then relies on the cylinder stat to fire the boiler and once that is satisfied it closes down.