Ok. Had an extractor fan replaced. The old fan turned on when the light went on and then kept running for a set amount of time after the light was turned off.
However I had originally specced a humidistat and timer controlled one which was fitted today while I was out.
However, now that the new fan is in, it only turns on once the light is on and the humidity hits a certain level, which is fair enough, however, when the light it turned off it goes off immediately, which shouldn't happen.
I have taken a look as I think I understand how it should work - a live, neutral and a switched live cable. Indeed there are 3 cables. However, the live is only live when the light is on and what is connected to the switched live is only live when the light is off.... I can't understand how the last one worked.
If I swap the 2 "live" cables over the fan comes on if the humidity is right and the light is off and turns off when the light is on.
Any ideas? It took so long to get the guy to come back that if it is something simple I'd rather sort myself.
Cheers.
However I had originally specced a humidistat and timer controlled one which was fitted today while I was out.
However, now that the new fan is in, it only turns on once the light is on and the humidity hits a certain level, which is fair enough, however, when the light it turned off it goes off immediately, which shouldn't happen.
I have taken a look as I think I understand how it should work - a live, neutral and a switched live cable. Indeed there are 3 cables. However, the live is only live when the light is on and what is connected to the switched live is only live when the light is off.... I can't understand how the last one worked.
If I swap the 2 "live" cables over the fan comes on if the humidity is right and the light is off and turns off when the light is on.
Any ideas? It took so long to get the guy to come back that if it is something simple I'd rather sort myself.
Cheers.