Replace the Microswitch

Tools Required: Phillip-head screwdriver, Pliers (optional)

Follow along as we replace the microswitch in a FlowZone® battery powered backpack sprayer.

Watch:

Step-By-Step Instructions:

STEP 1: Remove the Front Cover Plate

1. Remove the battery and the external hose from the sprayer.

2. Using the screwdriver, remove the 7 screws on the front cover plate. Note that 3 screws are located under the battery cover.

3. Pull the front cover plate away from the rest of the unit.
   
   

STEP 2: Locate and Remove the Microswitch

1.  Locate the microswitch at the end of the diaphragm pump. The microswitch housing is shaped like the letter "P".
2. Use the screwdriver to loosen the top and bottom screw to the microswitch housing. Avoid tampering with the adjustment screw in the middle.
3. With the microswitch revealed, gently remove it from the diaphragm pump.
4. Using your fingers or the pliers, disconnect the pump wires from the microswitch.

STEP 3: Install Replacement Microswitch

1. Take the replacement microswitch and connect the prongs to the pump wires. Slide the rubber sleeves back into place over the connectors if they were moved.
2. Place the housing over the microswitch and secure it with the two screws from earlier.

STEP 4: Test the Sprayer

1. It is a good idea to test the sprayer before reinstalling the front cover plate. Start by attaching the external hose and inserting a charged battery.
2. Pour some water into the sprayer.
3. Turn the sprayer on and activate the trigger.
   
   

Note: Be careful not to get any liquid on the internal components and wiring.

STEP 5: Reinstall the Front Cover Plate

If the sprayer is working properly, reinstall the front cover plate using the 7 screws from earlier.