Hi
I have been trying to resolve a problem with the 3 amp fuse blowing when i switch the programmer to heating only.The system is a y plan and at first I thought there was a wiring problem so I sourced all the cables identified them and made sure it was wired correctly.
As i knew the problem was with heating only I disconnected the heating on wire form the programmer to start a process of elimination .Even with the heating on wire disconnected which initailly goes to the room stat the programmer blows the 3mapfuse when switched to heating.I put a new fuse in and with programmer front temporarily off checked voltage and polarity both o.k.I was lucky enough to have different programmer in my stock to try and the same fault occurs.
The RCD never trips at fuse board so I dont think its an earth problem.The plot has thickened in that the fused spur is now not allowing power through it.
any suggestions and help appreciated
Thank you!
young plumb
I have been trying to resolve a problem with the 3 amp fuse blowing when i switch the programmer to heating only.The system is a y plan and at first I thought there was a wiring problem so I sourced all the cables identified them and made sure it was wired correctly.
As i knew the problem was with heating only I disconnected the heating on wire form the programmer to start a process of elimination .Even with the heating on wire disconnected which initailly goes to the room stat the programmer blows the 3mapfuse when switched to heating.I put a new fuse in and with programmer front temporarily off checked voltage and polarity both o.k.I was lucky enough to have different programmer in my stock to try and the same fault occurs.
The RCD never trips at fuse board so I dont think its an earth problem.The plot has thickened in that the fused spur is now not allowing power through it.
any suggestions and help appreciated
Thank you!
young plumb