Help with 3155

[NatD]

Hello.

My ATO was working wonderfully. Then, a few days ago, it stopped topping up. If I unplug it and plug it back in, it fills the sump back up to the correct level. However, it won’t initiate filling again on its own unless I unplug and plug back in the controller again.

Please help! Thank you!

 

[Roy Arena]

You want to make sure the optical sensor is clean. You can take it out and soak it in water with a little vinegar or citric acid.

 

[NatD]

You want to make sure the optical sensor is clean. You can take it out and soak it in water with a little vinegar or citric acid.

Thank you, I’ll try this now.

 

[Roy Arena]

You're welcome.

 

[rvitko]

Yes, this would be a sensor issue the most common would be a sensor hazed over by calcium deposits and a soak in vinegar or citric acid will solve it.

 

[NatD]

It absolutely worked! Thank you both.

 

[Roy Arena]

You're welcome.