Troubleshooting Start

On this page we can help you in being systematic in solving your hot tub problem. We start from "Nothing works" to "xx" doesn't work. Follow the links and we can help you be the Hot Tub Pro for your own hot tub. Lets get started:

 

We get calls daily where the customer says "the hot tub doesn't work!". After a discussion its the "XXXX" doesn't work. Could mean the heater doesn't work or one jet pump doesn't work or the hot tub is completely dead.

Typically electronic models operate the same way. When you first apply power to the hot tub the board does a self test. This self test can revel a problem. So lets walk through a typical hot tub start-up:

Turning on power. On some models, there are TWO sources of power. We do not address that design because its not standard. So you turn on main power. This activates the system. Boards do a self test so there may be a delay in the hot tubs starting. You might see the heater light come or or some digital topsides countdown and newer ones read out the model's version number. Also... some hot tubs the circulation or low speed pump comes on immediately.

So what if nothing comes on? By this we mean nothing. Some think if its heating but the jet doesn't come on, its "nothing". Nothing is nothing. OK, first step is to see if the fault is incoming power or the hot tub. Often people think the breaker is reset but isn't. So turn the breaker to FULL off and then on. If you hear a "click" when turning on and the handle sets in the middle, that means the gfci is popping. Its the same result when you press the TEST button. Its a short!

But the definitive way to check is with a voltmeter. See Here.  Once you confirm you have proper power to the hot tub, its get simpler. Thankfully hot tubs built after 1994 most commonly have digital topside that give you codes. If so, go to CODES. If you topside is blank but you know you have proper power, either the board is damaged or a fuse has blown. Turn main hot tub power off. Turn your meter to OHMS and test each fuse in place. Likely one or two fuses are attached to the board to protect the board.

Now, you checked all fuses and all is OK. Next is the transformer. On MOST models the transformer is not physically part of the board. If it is, you can't do this test. See Test Transformer.

If the transformer passes, that only leaves the board. Replace the board.

When individual components fail:

Now, when components like jet pump or heater or air blower fail, they typically are obvious. BUT... not always. Again, proof is with a voltmeter. Example: "Everything works but my #2 jet pump.". So you think, need a new #2 jet pump. You buy one (from us, of course) and install. So proud of yourself. Turn on hot tub... STILL no #2 jet pump.

Proof is the voltmeter. You MUST check the voltage to the jet pump or whatever has failed. WHY? The failure could be a number of issues. Let's see:

a. On many models, the 20, 25, or 30amp fuse is the link to the pumps. The board WILL actually come on but the pump will not. So the above test with the fuses confirms its NOT a fuse issue.

b. Some systems the board operates on 115v BUT the pump operates on 230v. SO... the hot tub's topside comes on, you press the jet button, hear a CLICK.. must be the pump motor. Replace. No help. Turns out ONE leg of the 230v is out so the power to the board is AOK but not to the motor. Fix incoming power and you solve problem.... and now have an extra jet pump.

c. The topside button has failed. So you push the button, it really doesn't do anything, so the component does not come on.

d. The board has failed. Its not turning on the component.

e. Lastly... it IS the component and you replace.

So... the hot tub tech's simple method:

a. Proper incoming power to hot tub

b. Proper power to component. Yes, replace component. No, determine topside or board.

 
 

Older SCM Units built 1983-1993 with:

Unfortunately, these older units made 1994 and earlier can be extremely hard to troubleshoot. Most techs won't even work on them. So if you have one of these units, its better to contact Tech Support and give your specific failure and we can try to help. Tech Support

 

 JWB Models built 1994-2001:

Nothing Works (see the top of this page)

The digital topside is missing a leg on letter/numbers: Normally this does not affect operation of the hot tub. If it does, typically you replace the topside itself. In rare occasions you must also replace the pcboard.

Everything works but its not heating

It pops the breaker

The "xxxx" doesn't work. Usually that means the component has failed. To test you can check the fuses and voltage output to the component. See Here for More Help

 

    JHT Models built 2002-Present

Nothing Works (see top of this page)

I'm getting an error code: See Here

The digital topside is missing a leg on letter/numbers: Normally this does not affect operation of the hot tub. If it does, typically you replace the topside itself. In rare occasions you must also replace the pcboard.

Everything works but its not heating

It pops the breaker

The "xxxx" doesn't work. Usually that means the component has failed. To test you can check the fuses and voltage output to the component. See Here for More Help

Dreaded Watchdog  --- or ---- See Here

 

 

 
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