Hi all,
Recently experienced problems with my conventional boiler (Worcester Bosch Greenstar 15ri) and central heating. Some background:
When on HW only, it would take around 60-90 mins to get from a completely cold cylinder to a hot cylinder. I think the cylinder has a capacity around 180 litres.
When on CH only, after a couple of hours only the loft and 1st floor radiators would get hot/warm. The ground floor radiators would not get even warm, and the feed pipe to these radiators are cold (I suspected some sort of blockage or sludge build up).
I avoid having both HW+CH on at the same time, as it takes 3-4 hours for the cylinder to get hot, and the 1st floor & loft radiator only get midly warm.
I called a heating engineer, and he agreed my diagnosis of blockage/sludge and drained and flushed the system and cleaned out the F+E tank. As the water was been drained and flushed much of it was dark brown/red colour but also sometimes turned black.
He suspected there was also a problem with the diverter valve, and when this was replaced, I noticed that there was a lot of sludge in the valve (see pictures). I'm guessing it's safe to assume the rest of the pipework will be in a similar state?
Unfortunately none of this cleared the problem of the ground floor radiators being cold, though the heating engineer, added some CH system cleaner so we will see if that improves things.
However wanted to hear if anyone had any other ideas or thoughts? based on the pictures, is there anything else worth trying?
Recently experienced problems with my conventional boiler (Worcester Bosch Greenstar 15ri) and central heating. Some background:
When on HW only, it would take around 60-90 mins to get from a completely cold cylinder to a hot cylinder. I think the cylinder has a capacity around 180 litres.
When on CH only, after a couple of hours only the loft and 1st floor radiators would get hot/warm. The ground floor radiators would not get even warm, and the feed pipe to these radiators are cold (I suspected some sort of blockage or sludge build up).
I avoid having both HW+CH on at the same time, as it takes 3-4 hours for the cylinder to get hot, and the 1st floor & loft radiator only get midly warm.
I called a heating engineer, and he agreed my diagnosis of blockage/sludge and drained and flushed the system and cleaned out the F+E tank. As the water was been drained and flushed much of it was dark brown/red colour but also sometimes turned black.
He suspected there was also a problem with the diverter valve, and when this was replaced, I noticed that there was a lot of sludge in the valve (see pictures). I'm guessing it's safe to assume the rest of the pipework will be in a similar state?
Unfortunately none of this cleared the problem of the ground floor radiators being cold, though the heating engineer, added some CH system cleaner so we will see if that improves things.
However wanted to hear if anyone had any other ideas or thoughts? based on the pictures, is there anything else worth trying?