Hi can anyone help, I have a combi boiler that has stoped heating radiators down stairs.
The boiler is up stairs and heats the upstairs radiators without a problem.
If i check the pipes where they go downstairs both the flow and return are cold.
If i check the t on the pipes all 3 pipes on the flow are hot.
I have tried draining the system this morning but the same problem still exists.
The boiler is only running for about 10 seconds then shuts down and re- runs after about 60 seconds.
Thanks John