This video will show you how to factory reset the SE Controller. The SE Controller is found with the following Aquatrol valve models:

AQT-56SE-FT
AQT-56SE-ST
AQT-56SE-SM

After the factory reset is done, please reprogram your valve completely.

WARNING: We strongly suggest this maintenance be performed by a water treatment professional.

For more details about your valve, check the installation manual. You can download it here:

https://aquatroltech.com/dl/manuals/AQT-56SE_Manual.pdf