Quick Answer: How To Test Hot Tub Heater?

How do you know if your hot tub heater is bad?

To test if a bad heater is causing your tripped breaker, you can disconnect the copper tabs (or wires) from the spa pack to the heater element. Once disconnected, turn the power back on. If the breaker stays on, you’ve determined that the heater is bad.

Why is my hot tub heater not working?

If your spa heater won’t heat, remove and clean the filter(s) to rule out a pressure or flow rate problem in your hot tub heater. Low water level, a clogged pump impeller, closed valves, clogged pipes, or blocked spa drain covers can also cause flow issues.

How do I reset my hot tub heater?

How to Reset a Spa Heater

  1. Locate the spa’s high-limit reset. This is a red button found on many spa packs.
  2. Press the high-limit reset button.
  3. Turn on your spa and observe its operation.
  4. Flip the breaker panel switch on or press the reset button on the GFCI outlet to restore power.
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How do you troubleshoot a spa heater?


  1. LOW FLOW. Your spa heater depends on adequate water flow in order to operate.
  2. THERMOSTAT. The thermostat is that dial you turn to increase the heat.
  5. Tripped GFCI.
  6. Spa Cover.
  7. Door Interlock Open.
  8. Wires are Loose.

How long does a hot tub heater last?

A hot tub heater lasts for around five years on average. One way to tell if you need a replacement heater is if it’s taking a long time for your hot tub to heat up or get warm enough.

Do you have to drain hot tub to change heater?

To replace a hot tub heater element, turn off the spa completely and turn the breaker off. Then drain the spa or shut off the service valves on either side of the heater. Remove the spa heater by unscrewing both heater unions taking care not to loose the o-ring inside each of the unions.

Does hot tub heat up faster with jets on?

A hot tub heats up faster if the jets are turned on. This is because the water circulates with the jets on, which evenly disperses heat and prevents cold water from being trapped in the hot tub pipes.

Why is my hot tub heating up slowly?

If your water heats up, but very slowly, you may simply need to change the filter. A heater that continuously turns on and off also indicates the filter must be changed. Hot tubs that are used often will need to have these cartridges changed more frequently.

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Where is the high limit reset button?

The High Limit Reset Button is located behind the gas valve.

How do I reset my water heater thermostat?

Somewhere on your electric water heater, you’ll find a reset button. It’s usually red and often located near the thermostat. It may also be hidden behind a removable metal panel on the unit—and then behind some insulation. Once you find the button, push and release it.

Why does my hot water heater keep tripping the reset button?

A short in one of the heating elements allows power to flow through the element even after the thermometer shuts off its power. This means the heating element is still working and will continue to increase the water temperature, eventually tripping the reset button.

How can I heat my hot tub faster?

You can heat a hot tub faster by turning on the jets, placing a cover over the tub, and using a more powerful heater. These are the easiest and most effective ways to increase your tub’s heating speed. It would be best if you didn’t fill a tub with hot water.

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