Last radiator is cold

[blu3tang]

My sister has purchased a house.

When she puts the heating on, all the rooms in the house are warm except her sons bedroom.

The radiator in his room has to be bled every 2 weeks. Im also assuming her sons bedroom is the last radiator in the house when the pump is on. Upstairs is her bedroom and her sons bedroom (toliet etc downstairs), her room is warm (with hot radiator)

She has resorted to turning off all the radiators what are not being used (dining room etc) and its still cold (her sons room and radiator). She was advised to get a bigger radiator (double one) and it didnt make any difference.

She has insulated the house (previous people actually took the insulation with them!!)

any idea?

The oil heating boiler was serviced last year.

thanks in advance.

 

[timmy74]

are both pipes going to the radiator getting hot/warm? maybe blocked, also rad may be full of sludge. also system may need balancing to get the younguns bedroom rad hot

 

[blu3tang]

are both pipes going to the radiator getting hot/warm?[/quote[
not sure shall find out.