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Help, I replaced a radiator including TRV so I had to drain to fit, when I replaced I have no water in the first floor rads but the groundfloor are full, when the heating is switched on I now have no hot water or heating do I have an air lock, if so what do I do Thanks Allan

HI Chaps, I recently changed a radiatior refilled the cylinder etc fired up the boiler and the rads are all working fine but I have no hot water, the cistern filled OK this is an old system and it has two two way diverter valves. When I switch the time clock to hot water only the first...