Hi,
I have a Worcester Bosch Gas Combi (24Si?) that is 6 or 7 years old.
I turned on the central heating and the rads downstairs wouldn't heat up. I joined the NPower CH scheme, a guy came to do a service, but we wont be covered untill its working. He said possibly pump or dirt in the pipes.
I have fitted a new Grundfos 15-60 pump and removed all downstairs rads and flushed them through with the hose (water was a bit grey) and flushed them again whilst connected to the pipe work with one end with a hose on.
When i was flushing i had the boiler running, with the mains cold water feed running too and hot water came through, when i connect the rad back to the system and the level was topped up, its still only the upstairs rads that get hot.
I have drained the system completely and refilled - no change
I have closed all upstairs - no change, downstairs still cold
I have closed all upstairs and all but the one nearest to the boiler - still doesnt warm up.
The Grudfos pump i bought has IP44 (not sure what that is) and so does the original Bosch/Grudfos
They are both 15 - 60
The original 3 speeds of the Bosch pump are 45 -75 -95, the new one is 50 - 60 70, would that make a difference, should i buy a bosch one?
If anyone has any ideas and can help, that will be great
Thank you for taking the time to read this.
Richard.
I have a Worcester Bosch Gas Combi (24Si?) that is 6 or 7 years old.
I turned on the central heating and the rads downstairs wouldn't heat up. I joined the NPower CH scheme, a guy came to do a service, but we wont be covered untill its working. He said possibly pump or dirt in the pipes.
I have fitted a new Grundfos 15-60 pump and removed all downstairs rads and flushed them through with the hose (water was a bit grey) and flushed them again whilst connected to the pipe work with one end with a hose on.
When i was flushing i had the boiler running, with the mains cold water feed running too and hot water came through, when i connect the rad back to the system and the level was topped up, its still only the upstairs rads that get hot.
I have drained the system completely and refilled - no change
I have closed all upstairs - no change, downstairs still cold
I have closed all upstairs and all but the one nearest to the boiler - still doesnt warm up.
The Grudfos pump i bought has IP44 (not sure what that is) and so does the original Bosch/Grudfos
They are both 15 - 60
The original 3 speeds of the Bosch pump are 45 -75 -95, the new one is 50 - 60 70, would that make a difference, should i buy a bosch one?
If anyone has any ideas and can help, that will be great
Thank you for taking the time to read this.
Richard.