Hot Tub Supply Spa Depot
Troubleshooting Spa Equipment
Repairing Hot Tubs
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CAUTION: Electrical repairs can be dangerous, especially around water. We recommend that repairs be referred to a qualified electrician or spa technician. Regardless of who performs the work, make certain that all electrical power to the hot tub or spa is disconnected prior to making any inspections or repairs. The information  provided here is for educational purposes only.

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Spa repairs No light.

Components associated:

  • Light Air Switch
  • Light Transformer
  • Light Fuse
  • Lamp

A) Check for 12vac at light pigtail. If the 12vac tests correctly, replace the bulb.

B) If there is no voltage, go to output of light air switch. If this checks good (110vac), replace light transformer.

C) If there is no output from the light air switch, check the input voltage. If this is good, replace the light air switch.

D) If the input to the light air switch is incorrect, check the light fuse. Replace as necessary. If the fuse blows again, isolate the light transformer from the pump air switch by disconnecting the output wire. If this keeps fuse from blowing, reconnect and then isolate transformer output by disconnecting either output wire. If fuse blows, replace transformer. If fuse remains good, inspect and replace light harness.

E) If the fuse checks good but there is still no power to light air switch, either there is an internal wiring issue or there are other symptoms that have not been discovered. Operate unit completely and trouble shoot based on new findings. If unit checks good in all other functions, you have an internal wiring or circuit board malfunction.

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