down stairs heating not working, hot water and upstairs ok

[stuartjohn]

i have a back boiler and had it and my heating serviced back in march this year. in the summer i turned all my radiators of using the individual thermostats on the radiators. when i turn my hot water on the radiators upstairs warm up regardless wether the heating is on or not.

i have now turned all the rads on again but i can not get no heat from the down stairs rads, i have tried to bleed them and had little joy.

also some of the thermostats are really tight and i have used a monkey wrench to turn them but am scared of breaking them and having water leaks.

any help or guidance would be greatly received
thanks

 

[malkie]

close upstairs and see if downstairs heat up

 

[jamhot]

is pump working?

 

[gas4you]

Sounds like pump has stuck and upstairs are geting warm through gravity circulation.