What are the Best Tips for Hot Tub Troubleshooting?

T. L. Childree
T. L. Childree
A hot tub.
A hot tub.

Hot tub systems can be somewhat complicated, but there are a few troubleshooting tips that can be used to avoid calling a repair technician. Hot tub troubleshooting is typically needed for the water piping and electrical systems of the unit. Common problems include calcification of jets, lack of water pressure, and erratic jet function. Water temperature issues and blown fuses are also common occurrences with hot tubs. Water leaks are another problem that can be solved with a few troubleshooting tips.

A multimeter, which can be used to test a hot tub's power supply.
A multimeter, which can be used to test a hot tub's power supply.

One of the most common hot tub troubleshooting problems is frozen water jets. This is usually due to a calcium build-up caused by hard water conditions. A testing kit can be purchased at a hardware store to determine the softness of the water. If a hard water condition is present, it will probably be necessary to install a water softener to solve the problem. Once the softener has been installed, clean the jets with a calcium remover and refill the tub.

Another issue that requires hot tub troubleshooting is a lack of water pressure in the unit. Low water pressure is usually caused by air entering the pump mechanism when the tub is drained for routine maintenance. The air must be removed from the pump to correct this condition. To remove the air, access the pump and slightly loosen the discharge line coupling. Turn the pump on and allow the air to escape completely before tightening the coupling.

Erratic jet function is a frequent hot tub troubleshooting issue that requires attention. This problem is generally caused by a dirty filter. To test filter function, remove it and allow the pump to run without it for several minutes. If the jets begin to function normally, clean or replace the filter at once. If the problem continues while the filter is removed, a repair technician will probably be needed.

Another condition that requires hot tub troubleshooting is overheated water. There are several possible causes for this condition, but a thorough examination of the system will usually locate the problem. First, determine if the heater contractor has become permanently shut and replace it if necessary. Next, turn the thermostat as high as possible and check the water temperature with a thermometer. If the temperatures do not match, replace the thermostat.

If the hot tub will not heat the water at all, the thermostat may need to be replaced. Before replacing any parts, remove the filter and allow the tub to run for a couple of days without it. If the water temperature has increased without the filter, replace it. Should the water temperature not increase during this time, change the thermostat. Be sure to replace the thermostat with the exact model number to avoid damaging other tub components.

If the hot tub stops working altogether, a fuse may be blown. Turn of the main power supply to the tub, locate the fuse, and test it for continuity using a multimeter. If the fuse fails this test, replace it with one of the same amperage. If the fuse is not faulty, turn the current back on and check the voltage going to the tub. If the voltage is sufficient, a repair technician may have to be called.

If water is leaking from the hot tub, a thorough inspection of the unit will probably be required to determine the source. Begin by inspecting the pump for leaking seals and replace any faulty components. Inspect the fittings between the pump and heater for leaks and tighten if needed. Examine the pressure switch, heater, and valves for leaking water and tighten any lose connections. Check each jet for leaking seals and replace any worn parts.

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    • A hot tub.
      By: Goran Bogicevic
      A hot tub.
    • A multimeter, which can be used to test a hot tub's power supply.
      By: pavantt
      A multimeter, which can be used to test a hot tub's power supply.