How to Replace the Motor in a Zone Valve

Zone valve motors sometimes start to malfunction or even breakdown, which means replacements will need to be made. But plumber bills can be high and many people wish to learn how to do these repairs by themselves. So here is how you can make the replacement yourself.

Tools & Supplies Needed
  • New Motor
  • Flashlight
  • Screw Driver
  • Wrench

Step 1: Turn Off Power and Water

First step is to turn off power and water supplies to the unit. Allow for 15-20 minutes to pass before you proceed. You may need to drain the tank out before you begin working on it.

Step 2: Open Up and Find Old Zone Valve Motor

Using a screwdriver, open the tank carefully and look for the old zone valves first. Then look for the motor, which should be connected to the valves. Try to be extra aware if it is hot; if so wait for a while so that it can cool off before you begin to work on it. Otherwise, you can begin to disconnect the connectors of the motor to the valves, which can also be hot. So again, be careful when disconnecting them.

Step 3: Remove Old Motor

After you have disconnected it from the valves, you can begin to disconnect it from the unit. Most will either be connected via bolts or screws, so use the right tools according to how it is attached. Once you have disconnected it from the unit, you will likely need to disconnect the wires which keep it running. Remember not to cut them by mistake or if you are in a hurry. Pay attention to where and how they are connected, so that you can reconnect them once you install the new part(s).

After it is completely out, set it aside and place the wires into groups that you will be attaching to the new motor. This will allow for easier installation.

Step 4: Install New Motor

Take new motor out of the box and follow any instructions that they give you. Then begin to attach the wires from the unit to the motor. After you do that, you can anchor it down to the unit. Make sure that the bolts or screws that you used to anchor it down with are tight enough. You do not want it to fall into the tank. So always double-check before moving on.

Step 5: Attach to Valve

Now you can attach the wire connectors from the motor to the valve. Pay attention to where you are attaching them, so in case you have to disconnect them again, you can connect them in a different way. Take notes if needed.

Step 6: Close Up and Test

Now you can close the tank after you connect the motor to the valves. After that, you can turn on the water supply and power. Allow it to fill up for a while and then test it. If it works successfully, then you are done. If not, go back and double check the connectors and reconnect them if needed. They may have not been matched correctly.