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How to replace a water softener rotor position switch
This DIY repair guide explains how to replace the rotor position switch in a water softener. The rotor position switch tells the timer what position the rotor is in, so the timer knows when to start the motor that turns the valve rotor through cycles. If the position switch breaks, the motor runs constantly. Replace a broken rotor position switch with the manufacturer-approved water softener part.
Use these steps to replace the rotor position switch in Kenmore, GE and Whirlpool water softeners.
Quick links
Video
Instructions
Tools required
Phillips screwdriver
Work gloves
Repair difficulty
Time required
30 minutes or less
Repair difficulty
Time required
30 minutes or less
How to replace a water softener rotor position switch repair guide video.
Replacing a water softener rotor position switch video.
Instructions
- 01.
Disconnect electrical power
Unplug the water softener to disconnect power.
- 02.
Remove the top cover
Open the lid and release the 2 front clips on the cover.
Lift the front of the cover up and push it back to release the rear tabs.
Pull the top cover off.
PHOTO: Open the lid.
PHOTO: Release the front clips.
PHOTO: Remove the top cover.
- 03.
Remove the valve motor
Remove the valve motor mounting screws and lift the valve motor off of the rotor.
PHOTO: Remove the valve motor screws.
PHOTO: Lift off the valve motor.
- 04.
Remove the rotor position switch
Remove the plastic cover.
Lift the rotor position switch off of the mounting pins.
Disconnect the wires.
Remove the rotor position switch.
PHOTO: Lift off the plastic rotor cover.
PHOTO: Lift the switch off the mounting pins.
PHOTO: Disconnect the switch wires.
- 05.
Install the new rotor position switch
Connect the wires to the new rotor position switch.
Push the new rotor position switch onto the mounting pins and reinstall the plastic cover.
PHOTO: Connect the switch wires.
PHOTO: Install the new switch.
- 06.
Reinstall the valve motor
Position the valve motor and screw it into place.
PHOTO: Reinstall the valve motor.
- 07.
Reinstall the top cover
Position the back of the top cover into the rear tabs and then push the front of the top cover down into the front locking clips.
Close the lid.
PHOTO: Reinstall the top cover.
- 08.
Restore power
Plug in the power cord.
Warning: Undertaking repairs to appliances can be hazardous. Use the proper tools and safety equipment noted in the guide and follow all instructions. Do not proceed until you are confident that you understand all of the steps and are capable of completing the repair. Some repairs should only be performed by a qualified technician.
Symptoms for water softeners
Choose a symptom to see related water softener repairs.
Main causes: faulty brine valve assembly, bad rotor valve…
Main causes: clogged drain hose, faulty rotor valve, leaky rotor valve seals…
Main causes: salt bridge inside the salt tank, bad timer, valve motor failure, faulty rotor valve, clogged venturi…
Main causes: loose water line connections, cracked water-carrying components, bad rotor valve seals…
Main causes: lack of electrical power, bad power transformer, faulty timer…
Main causes: empty salt tank, salt bridge, depleted resin, clogged or damaged venturi, broken rotor position switch, fai…
Main causes: broken resin tank screen, bad resin tank seals, cracked upper distributor in resin tank…
Main causes: broken water flow meter, faulty timer, water flow to softener is bypassed…
Repair guides for water softeners
These step-by-step repair guides will help you safely fix what’s broken on your water softener.
How to replace a water softener venturi
The venturi valve in your water softener draws brine water from the salt tank to the resin tank for regeneration. Follow…
Repair difficulty
Time required
15 minutes or less
How to replace a water softener rotor position switch
The rotor position switch detects the position of the valve rotor. If the rotor position switch fails, follow these step…
Repair difficulty
Time required
30 minutes or less
How to replace a water softener timer
The timer is the control board you use to program the water softener. If the timer isn’t accepting commands when you pus…
Repair difficulty
Time required
15 minutes or less
Articles and videos for water softeners
Use the advice and tips in these articles and videos to get the most out of your water softener.
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