Why does my Pentair FLECK 5800 XTR2 Controller use too much salt?
- EEmily LewisSep 8, 2025
If your Pentair Controller is using too much salt, verify the salt usage and salt setting. Also, check for excessive water in the brine tank.

Why does my Pentair FLECK 5800 XTR2 Controller use too much salt?
If your Pentair Controller is using too much salt, verify the salt usage and salt setting. Also, check for excessive water in the brine tank.
What to do if my Pentair FLECK 5800 XTR2 Controller fails to regenerate?
If your Pentair Controller isn't regenerating, first ensure it has continuous electrical service by checking the fuse, plug, pull chain, or switch. If the power supply is okay, the timer might be defective and need replacement. Also, check if there was a power failure and reset the time of day.
What does it mean if my Pentair FLECK 5800 XTR2 displays 'Flow meter error No flow detected'?
If your Pentair Controller shows 'Flow meter error No flow detected', it means that no flow has been detected for 7 days. This error will clear when a flow pulse is detected. Check that the meter cable is properly installed and that the meter spins freely. If necessary, clear any debris from the meter. If the error continues, call technical support.
What to do if the Pentair FLECK 5800 XTR2 shows 'Motor Stall Motor Run-On'?
If the Pentair Controller displays 'Motor Stall Motor Run-On', it means no state changes in the optical sensor are detected for six seconds. Here's what you can do: * Unplug the unit, then plug it back in to allow the control to find its position. * Check that the optical sensor is correctly placed and wired to the circuit board. * Make sure the motor and drive train components are in good condition and properly assembled. * Inspect the valve to ensure the piston moves freely. Replace or reassemble any components as needed. After these steps, plug the unit back in and monitor its operation. If the error persists, unplug the unit, put it into bypass.
Why does my Pentair FLECK 5800 XTR2 Controller valve constantly regenerate?
A Pentair Controller valve constantly regenerating indicates a regeneration loop condition caused by a programming error. To resolve this, disconnect the motor from the control circuit board to trigger a Motor Stall error, which allows access to Master Settings. In the Valve screen, check the Regen Type settings. Ensure the Capacity value is greater than the Hardness value, and save these settings. If the problem continues, unplug the unit, put it into bypass.
Why is the drain flowing continuously in my Pentair FLECK 5800 XTR2 Controller?
If the drain is flowing continuously in your Pentair Controller, it could be due to incorrect valve programming. Check the timer program and the positioning of the control; if it's not positioning properly, replace the power head assembly. Another cause could be foreign material in the control; in this case, remove the power head assembly, inspect the bore, remove any foreign material, and check the control in various regeneration positions. Finally, an internal control leak could be responsible, requiring you to replace the seals and piston assembly.
Why is there iron in the conditioned water from my Pentair FLECK 5800 XTR2?
If you're experiencing iron in the conditioned water from your Pentair Controller, it's likely due to a fouled mineral bed. Check the backwash, brine draw, and brine tank fill. Increase the frequency of regeneration and the backwash time.
What causes loss of mineral through the drain line in my Pentair FLECK 5800 XTR2?
If you're experiencing a loss of mineral through the drain line of your Pentair Controller, ensure that the well system has a proper air eliminator control and check for a dry well condition. Also, verify that the drain line flow control is properly sized and check for the correct drain rate.
How to stop my Pentair FLECK 5800 XTR2 Controller valve from constantly regenerating?
If your Pentair Controller is constantly regenerating, it might be due to a programming error causing a regeneration loop. To resolve this, disconnect the motor from the control circuit board (see "WIRING DIAGRAM" on page 33 for location on circuit board). A Motor Stall error will occur, allowing access to Master Settings. Navigate to the Valve screen and check Regen Type settings. Make sure that the Capacity value is greater than the Hardness value, and save the settings. If the issue persists, unplug the unit, put it into bypass mode, and contact technical support.
What to do if my Pentair Controller shows 'No Salt Detect'?
If your Pentair Controller displays 'No Salt Detect', it means the chlorine generator is on but not reading salt. Add salt to the brine tank and perform a manual regeneration to clear the error.
| Brand | Pentair |
|---|---|
| Model | FLECK 5800 XTR2 |
| Category | Controller |
| Language | English |
Covers water pressure, electrical, plumbing, location, outdoor use, and bypass valve considerations.
Details the step-by-step procedures for system installation and electrical hookup.
Guides through initial setup screens like Format, Name, Phone, and Interval.
Details the Home screen layout and basic operational functions.
Settings for valve selection and regeneration type.
Configuration for relay outputs and meter settings.
Settings for sensor regeneration, saving custom profiles, and reviewing settings.
Guide for connecting the control to a PC for programming and diagnostics.
Configuration options related to the regeneration process.
Settings for continuous flow detection and alarms.
Information on accessing and interpreting diagnostic data.
Details on accessing the error log and reviewing parameter descriptions.
Lists common issues, their causes, and recommended corrective actions.
Details specific error alerts, their causes, and recovery procedures.












Loading...