E15 error and the unit reports low inlet pressure or will not start regeneration

Safety: Turn off power before working on plumbing. Relieve pressure slowly.

• Check other fixtures: Confirm whether low pressure affects the whole house. If so, address the main supply or well system.
• Inspect pre-filter: If a sediment or carbon filter is installed before the Foridra softener, replace or clean the cartridge.
• Bleed air: Open a nearby faucet and slowly open the inlet valve to the softener to purge air from the lines.
• Sensor test: Compare the pressure reading (if displayed) with a mechanical gauge. If they differ significantly, replace the Foridra pressure sensor.