I also have problems with radiators not getting hot enough and the cylinder doesn't get up to the right water temperature even after being on for nearly 3 hours. (How long should a cylinder take to heat from cold?)
I am having difficulty getting any local heating engineers in so considering BG though I have read bad reports about them.
Could be the pump, could be thermo. rad valves (though that wouldn't affect the cyclinder water), could be sludge (we have a microbore system but it has inhibitor in), could be the pump, could be the boiler (Potterton PrimaF). One local heating chap I spoke to (who hasn't phoned back as promised) said it was risky doing a power flush on microbore systems and that they put some chemical in and leave it for a while and then drained it out and flushed through. Does that sound right? The pipes are under solid floors so I don't want to risk any bursts.
I have tried bleeding the rads but they are hotter at the top than the bottom and had no air in them. The boiler seems to be on for about a minute and then off for 4, or that was the case when I checked during the very cold spell.
Advice would be much appreciated.
I am having difficulty getting any local heating engineers in so considering BG though I have read bad reports about them.
Could be the pump, could be thermo. rad valves (though that wouldn't affect the cyclinder water), could be sludge (we have a microbore system but it has inhibitor in), could be the pump, could be the boiler (Potterton PrimaF). One local heating chap I spoke to (who hasn't phoned back as promised) said it was risky doing a power flush on microbore systems and that they put some chemical in and leave it for a while and then drained it out and flushed through. Does that sound right? The pipes are under solid floors so I don't want to risk any bursts.
I have tried bleeding the rads but they are hotter at the top than the bottom and had no air in them. The boiler seems to be on for about a minute and then off for 4, or that was the case when I checked during the very cold spell.
Advice would be much appreciated.