Call Toll-Free in US
(866) 418-1840
(Mon-Fri) 8:30 am - 5 pm PST
(Sat) 9 am - Noon PST

Calibrating a Pressure Switch

A "Flow" message on the display of your control panel indicates a reduction in the flow of water through the spa heater. This may be caused by an old or dirty filter, and can restrict water flow. The pressure switch "reads" flow reduction and can prevent the heater from turning on. Adjusting the pressure switch can sometimes compensate for this flow reduction and allow the heater to turn back on. (We recommend cleaning filters monthly, and replacing them every 24-30 months to avoid this condition.) If the following steps don't solve the problem, you may have a defective pressure switch that needs replacing.

Let's get started:
To begin, confirm the spa water level is at the correct height, (and not too low). Next, remove the filter(s) and check your control panel. If the "Flow" message error is gone after about 1 minute, clean and reinstall the filter. If the error message returns after the filter has been cleaned, you need a new filter.

If a clean filter does not remove the "Flow" error message, let’s see if adjusting the pressure switch helps.

  • Step 1:

    For spas that heat using a large jet pump, the low speed should be operating. For spas using a small circulation pump for heating, confirm there are bubbles shooting in a steady stream near the light. Your spa model may not match the pictures exactly, but the process is the same.

  • Step 1:

    Turn the power to the spa off. Open your spa panel and locate the pressure switch connection on the printed circuit board.

  • Step 3:

    Unplug the pressure switch from the printed circuit board by holding it firmly and pulling straight out; otherwise you may damage the pins on the circuit board. (Your spa's pressure switch connector may be in a different location on the circuit board than pictured here.)

  • Step 4:

    Using sandpaper, carefully clean the two pressure switch pins on the circuit board to improve the connection. (Don't spend more than a few seconds on each pin; it does not have to be perfect, just better.)

  • Step 5:

    Replace the pressure switch connector by plugging it back onto the printed circuit board.

  • Step 6:

    Unplug both connectors on top of the Pressure Switch and sand the prongs on the switch, and wire terminals. Plug the terminals back in, noting that either wire can go on either prong.

  • Step 7a:

    For switches with an adjusting screw, as shown here, use a screw driver or allen wrench to turn the adjusting screw. Turn clockwise 2 full turns.

  • Step 7b:

    For pressure switches with an adjusting wheel, as shown here, lift the stop plate on the back, and turn the wheel clockwise 2 full turns.

  • Step 8:

    Now, slowly turn either the adjusting screw or wheel (whichever applies), counter clockwise until you hear the heater relay "click". The heat light should now glowing solid; indicating the heater is on. Make an additional 1/4 turn in the same counter clockwise direction. (Push the stop plate back down if you have one.) We like to put a drop of nail polish on the adjusting wheel or allen screw to help lock it further in place.

  • Step 9:

    Re-set the temperature to your desired level.

  • Step 10:

    If this does not solve the problem, you may need to replace the pressure switch.

These instructions are also on-line in color at
www.easyspaparts.com
Should you require additional information,
please call us toll free at 866.418.1840.

These instructions are for informational purposes only. Easy Spa Parts does not guarantee that following these instructions will resolve your specifi c spa condition, nor does Easy Spa Parts accept liability for work performed by anyone attempting the repair or part replacement. These instructions are provided solely by Easy Spa Parts. Certain parts mentioned in the instructions are manufactured by third parties, including Dimension One Spas. Dimension One Spas has not supplied or reviewed these instructions. Dimension One Spas shall have no liability to you relating in any manner to these instructions or any acts or omissions by Easy Spa Parts.

TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW: 1) EASY SPA PARTS AND DIMENSION ONE SPAS EXCLUDE ALL IMPLIED WARRANTIES THAT MAY ARISE IN CONNECTION WITH THE INSTRUCTIONS, INCLUDING ANY WARRANTY OF MERCHANTABILITY, NON-INFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE; 2) NEITHER EASY SPA PARTS NOR DIMENSION ONE SPAS SHALL BE LIABLE UNDER ANY LEGAL OR EQUITABLE THEORY, WHETHER IN CONTRACT, TORT OR OTHERWISE (INCLUDING NEGLIGENCE AND STRICT LIABILITY) FOR ANY DIRECT, INDIRECT, CONSEQUENTIAL, SPECIAL OR PUNITIVE DAMAGES WHATSOEVER , ARISING FROM YOUR USE OF THE INSTRUCTIONS OR FROM ANY MATERIAL CONTAINED IN, OR OMITTED FROM, THE INSTRUCTIONS