Recent content by raymcc

Its easy to check that the boiler is reverse plumbed, you can identify the flow and return from the manufacturers instrctions. What should be the return is consistently hotter than the flow. Problem arises becase the boiler thermostat is now on the water flowing into the boiler. So the water...

as they exit the boiler

easy,just feel the pipes, the return is hotter than the flow. Also boiler stat has to be held at 8 oclock

Hi all, I have just discovered after 10 years , that the flow and return on my trusty worcester bosch boiler , are reversed. Quick fix is to set the boiler stat to 8 o'clock position and set the pump to max ie not auto. The 3 port valve is working correctly, hot water comes in at the bottom and...