Having recently changed the engine freshwater fluid I now appear to have an air lock in the domestic hot water calorifier system. Can someone please advise which pipe connection I should remove to bleed the system?
Preferably the return feed from the calorifier to the engine. If you have a header tank which is higher than the calorifier coils (which you should have) it will only be necessary to briefly remove the pipe till water comes out with the engine not running. If you don't it may be necessary to run the engine to get the water pump to do the job for you.