E12 error and unit remains in regeneration for an unusually long time

Safety first: Shut off water and power before inspecting moving parts or the drain line.

• 1. Check drain line: Ensure the Rayne drain hose is not kinked, elevated too high, or blocked. Clear any obstructions and confirm a free-flowing drain during regeneration.
• 2. Listen for motor behavior: During regeneration, listen for repeated starts and stops or grinding noises from the control head, indicating mechanical binding.
• 3. Inspect rotor and seals: Remove the control cover and check for mineral buildup or debris around the rotor and seal pack. Clean and lubricate with approved silicone grease.

When to call a technician: If the motor overheats or the control board mis-times cycles, professional service is recommended.