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Help appreciated to help me think this one through..
Have changed the synchro motor
Gears are fine.. micro switch fully engages when hot water is switched on from timer.. you can see and hear the click from the microswitch
the switch is calling for the boiler to burn.. hot water no problem
Surely the microswitch, when off, closes the pipe to the cylinder and just directs the heated water into the central heating SO what triggers the call for central heating..maybe an open microswitch at the 2 port and a call from the room stat.
room stat is turned up
SO.. the room stat is faulty as the 2 port seems fine?
The heating sometimes works but sometimes doesn't.. an intermittent room stat fault?
It's an unvented system with solar water heating.. so two 2ports to the cylinder.
Have changed the synchro motor
Gears are fine.. micro switch fully engages when hot water is switched on from timer.. you can see and hear the click from the microswitch
the switch is calling for the boiler to burn.. hot water no problem
Surely the microswitch, when off, closes the pipe to the cylinder and just directs the heated water into the central heating SO what triggers the call for central heating..maybe an open microswitch at the 2 port and a call from the room stat.
room stat is turned up
SO.. the room stat is faulty as the 2 port seems fine?
The heating sometimes works but sometimes doesn't.. an intermittent room stat fault?
It's an unvented system with solar water heating.. so two 2ports to the cylinder.