January 1, 2015

How to replace a water softener rotor position switch

By Lyle Weischwill
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 replacement part.

Use these steps to replace the rotor position switch in Kenmore, GE and Whirlpool water softeners.

Quick links
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.

Open the lid.

Open the lid.

Release the front clips.

Release the front clips.

Remove the top cover.

Remove the top cover.

03.

Remove the valve motor

Remove the valve motor mounting screws and lift the valve motor off of the rotor.

Remove the valve motor screws.

Remove the valve motor screws.

Lift off the valve motor.

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.

Lift off the plastic rotor cover.

Lift off the plastic rotor cover.

Lift the switch off the mounting pins.

Lift the switch off the mounting pins.

Disconnect the switch wires.

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.

Connect the switch wires.

Connect the switch wires.

Install the new switch.

Install the new switch.

06.

Reinstall the valve motor

Position the valve motor and screw it into place.

Reinstall the valve motor.

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.

Reinstall the top cover.

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: broken resin tank screen, bad resin tank seals, cracked upper distributor in resin tank
Main causes: faulty brine valve assembly, bad rotor valve
Main causes: clogged drain hose, faulty rotor valve, leaky rotor valve seals
Main causes: lack of electrical power, bad power transformer, faulty timer
Main causes: loose water line connections, cracked water-carrying components, bad rotor valve seals
Main causes: empty salt tank, salt bridge, depleted resin, clogged or damaged venturi, broken rotor position switch, failed timer
Main causes: salt bridge inside the salt tank, bad timer, valve motor failure, faulty rotor valve, clogged venturi
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 rotor position switch

The rotor position switch detects the position of the valve rotor. If the rotor position switch fails, follow these steps to replace it in about half an hour.

Repair difficulty
Time required
 30 minutes or less
January 1, 2015
By Lyle Weischwill
How to replace a water softener venturi

The venturi draws brine water from the salt tank to the resin tank for regeneration. Follow these steps to replace a damaged venturi.

Repair difficulty
Time required
 15 minutes or less
January 1, 2015
By Lyle Weischwill
How to replace a water softener valve motor

The valve motor rotates the valve rotor to operate the water softener. If the valve motor fails, follow these steps to replace the valve motor.

Repair difficulty
Time required
 30 minutes or less
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Use the advice and tips in these articles and videos to get the most out of your water softener.

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