Error code changed from 123 to 121 after replacing back board in Aqualink system

wuthrirc

Member
May 16, 2019
23
Wichita Falls, TX
For 2 years I have been trying to get my Jandy Aquapure/Aqualink system to produce chlorine.

Summer of 2022, I got the 123 error code. Local pool company comes out and says I need a new salt cell. Cell was less than 3 years old and Jandy sent a replacement cell and cord. Still got the 123 code. Local pool company came out and got on the phone with Jandy support. Tested amps/current/voltage and couldn't find a problem. Used liquid chlorine the rest of the season.
Summer 2023, I just used liquid chlorine. Tried contacting Jandy support several times by phone, but gave up after being on hold each time for >30 minutes.
2024 - I'm tired of adding chlorine and I'm stubborn (or stupid) enough to think this is fixable. As a last resort, I decided to replace the back board. Now I get error code 121 instead of 123.
Any ideas or advice? There are no signs of corrosion anywhere and the cell looks clean.
 

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What is your salt level and how are you testing it?