Primo water dispensers are a great way to get clean, clear drinking water without the waste of bottled water. Primo dispensers use 3- or 5-gallon jugs of purified water. They can provide hot or cold water, depending on the model. Adjusting the temperature of the cold water from a Primo dispenser is easy, and doesn't require any tools.
Move the Primo water dispenser away from the wall, being careful not to tip or spill the water bottle.
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Locate the flat, brass-colored screw on the back of the water dispenser.
Turn the screw slightly clockwise for colder water or counterclockwise for warmer water. Wait one hour for the water temperature to stabilize.
Check the temperature of the water. Continue adjusting the knob, as necessary, until the desired temperature is reached.
Slide the Primo water dispenser back into its original position.