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How Do You Test Power to Your Heater?

With meter set to 300vac, carefully place a probe on each heater post. Do this when the heater light is ON solid.

If you get 115v or 230v, TURN OFF POWER TO THE HOT TUB.

Set the Voltmeter to OHMS. Place the probes on the same 2 posts. You should get 10-15 ohms resistance. If not, replace the heater.