Troubleshooting: No water from tub/shower units

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Typical Cause

Hot and cold water may not be supplied to the valve, improper use or an obstruction in the spout/showerhead could cause this to happen.

Solution

First, if external shut off valves are present, verify they are opened all of the way. It is extremely important that the units have both hot and cold water supplied to the inlets of the valve body.

Second, make sure there is nothing obstructing the spout or showerhead.

Third, it is essential to identify the model of your faucet. Please view our Find Your Product section to determine your model.

For Posi-Temp models:

  1. Rotate the handle to turn it on. The handle on this model does not pull out.
  2. Both hot and cold water MUST be supplied to the valve to get ANY water from the unit.
  3. If the valve has stops, both will need to be opened. If your Posi-Temp valve has these, they will be located on the inlets of the valve. The stops look like small flat head screws. The flat would need to be horizontal to be opened (if it is vertical, that will shut the water off).

For Moentrol models:

  1. Verify the handle is being pulled out to turn the water on. If the handle is only being rotated, the water will not turn on.
  2. Both hot and cold water MUST be supplied to the valve to get ANY water from the unit.
  3. If the valve has stops, both will need to be opened. If your Moentrol valve has these, they will be located on the inlets of the valve. The stops look like small flat head screws. Use a flat head screwdriver to unscrew this counter-clockwise until you reach a stop, this will ensure it is opened all of the way (screwing clockwise until a stop is reached will turn the water off).

For ¾" ExactTemp models:

Note: For ½" ExactTemp valves refer to original service manual.

  1. These units must be installed with a volume control valve in addition to the thermostatic valve. The volume control must be rotated counter-clockwise to turn the water on. The temperature (thermostatic) handle only adjusts the temperature.
  2. This model will have stops located on the inlets of the valve. The stops look like small flat head screws. Use a flat head screwdriver to unscrew this counter-clockwise until you reach a stop, this will ensure it is opened all of the way (screwing clockwise until a stop is reached will turn the water off).

For ioDigital models:

  1. Verify the controller will turn on. If it does not turn on, please see ioDigital valve will not turn on.
  2. Verify the shut-off valves are in the open position. These will vary depending on your IoDigital model.