In this post, we are going to show you how to test a pressure switch on a Hot Spot spa with a Hawk or Cedric control box. A failed pressure switch will show an error code of double dashes on the control panel. This is a common problem and a quick and easy test. First, let’s determine the tools you will need.
Table of Contents
Tools You Will Need:
- A flat blade or Phillips head screwdriver
Step 1. Disconnect power from the spa.
Step 2. Unplug the pressure switch from the motherboard.
Step 3. Remove the filter.
Step 4. Reconnect power to the spa.
Step 5. Immediately start the low-speed pump by pressing the JETS button once.
Step 6. Immediately jump the TOP TWO PINS of the pressure switch on the motherboard by touching the top two pins together with a large flat blade or Phillips head screwdriver.
Hold the screwdriver down firmly between the top two pins for at least 15 to 20 seconds. You need to make a solid connection between the two pins.
STEP 7. The red LED HEAT light (D20) will come on and the double dashes on the control panel will go away. This means you have a bad pressure switch!
Step 8. If the red LED HEAT light fails to come on and the double dashes don’t go away, repeat the test using a different screwdriver. Sometimes you will have to do the test a few times before the red HEAT light turns on and the double dashes go away.
Note: A bad pressure switch turns the heater off. If the red HEAT light (D20) turns on when you jump the pressure switch, it means you have a bad pressure switch. If the pressure switch test doesn’t work after several attempts, you may have a bad control box.
Watch the video here “How to Test a Pressure Switch on a Hawk and Cedric Control Box in 8 Steps“
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