i have a baxi back boiler which is not working properly when i turn on the heating only the upstairs get hot the downstairs get lukewarm the system clicks on and off every 5mins or so and the hot water is fine.this problem has been happening for the past week but today the fuse on the system blew (pump maybe) replaced the fuse and still hot upstairs cold downstairs all radiators are full and bleed.

tom, January 2005

The pump is gone, upstairs is heating by the gravity effect

bob, April 2006

thanks i think that is the problem but the pump went a few years ago and we lost our hot water, this time the hot water is fine?

tom, January 2005

it could well be the pump has gone as the upstairs rads will get hot by gravity (depending on the system)

plumbob, January 2005