Issue with APT heating switch - clock not working properly

Username202401

Hi all,

I would appreciate some advice.

I recently put in an APT timer switch.

The orange indicator light stay. The switch turns the heating off and on no problem.

But the 24 hour timer only works in the ON position ie when the heating is on which isn't really great.

Is this a faulty switch or some other issue at play?

Would appreciate any advice

monseiur

These APT timers have 3 settings OFF ON CLOCK To set CLOCK push slide switch to CLOCK and set time you want boiler to kick in. Say you want it to kick in at 7 am and switch off at 9 am - push in all the pins between 7 & 9. (The orange light will also come on at 7 am and switch off at 9am) Current time must be at black arrow on right hand side.

Username202401

https://www.boards.ie/discussion/comment/121612085#Comment_121612085

Thanks for your reply.

The issue is the 24 hour timer doesn't turn when sent to CLOCK or OFF. The timer only changes when it is on ON

Wearb

Either wired wrong or broken timer.

CrazyEric

https://www.boards.ie/discussion/comment/121612317#Comment_121612317

Sounds like it is wired it wrong. If the live in/live out are reversed then the clock will only get power when the OFF/ON/Clock switch is in the ON position.

Do you know an electrician to have a quick look at it? It is usually better to not mess with electrickery as it hurts when done wrong.

monseiur

https://www.boards.ie/discussion/comment/121612275#Comment_121612275

Undo the wiring and start again, this time follow the destructions 🤣 oops... I mean instructions