How to Troubleshoot for Problems With Spa Circuit Boards

Checking The Heating Element

• 1

  Turn the thermostat up to a high temperature, activating the spa's heating/filter cycle. Locate the heating element, typically resembling a metal cylinder. Set the multimeter to the voltmeter mode, allowing the device to measure voltage values.

• 2

  Attach the multimeter's leads to the heating element's posts. Two posts protrude from an otherwise smooth exterior surface. Make sure that one lead attaches to each individual post. Do not allow the leads to contact each other.

• 3

  Read the voltage value displayed on the multimeter. Spa systems run on either 110 or 220 volts. The multimeter should reflect the appropriate one of these values. The spa's circuit board has failed if the heating element reflects the correct voltage but does not heat the water.

Checking The Pressure Switch

• 4

  Remove the two wires extending from the pressure switch, effectively detaching the switch from the PCB. Use a lubricant on the wires, such as WD-40, to prevent wire breakage.

• 5

  Turn the spa on. Connect the switches' open wires together with another wire, forming a bypass.

• 6

  Measure the voltage across the heating element again. The voltage should reflect 110 or 220 volts. The spa's circuit board has failed if the voltage displayed is a different value.