Question about Jacuzzi RapidHeat In-Line Heater U395000 [ Bathtubs and Whirlpools,

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My inline rapit heater is leaking from inside control box?

Juzz hot tub

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Were is it leaking? and how bad?

Posted on Jan 13, 2009

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There is no hot water after we installed

If you currently have hot water coming to other parts of the house, and you have patiently waited for the hot water to reach the tub, then you don't have a hot water line connected to the faucet. Also, because a hot tub or whirlpool can hold more water than your water heater holds, an inline heater is often used. It attaches to the plumbing system on the whirlpool.

Dec 24, 2010 | Home

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Inline heaters for whirlpool bathtubs will not and cannot maintain any comfortable water temperature. Their sole function is to slow the time it takes for the water to cool off. The myth of their capabilities has long been a misleading sales propaganda joke in the industry.

Not all manufacturers put their model numbers on their tubs. Those that do will almost always post it on a label in the area of the tub where the back usually rests in the region of the motor but not on the motor itself.

I believe your quarter size cap is an air control for you jet. It controls the amount of air coming out the jet when the tub is full of water and the motor is on. You should see the difference in swirling water turning it from right to left or the other way around. If yours has a leak then I certainly hope you find the Model number. Good luck.

Nov 08, 2010 | American Standard Home

2 Answers

My Hot Tub, Hot Springs Model SQ, keeps shutting off. Under the black panel on hot tub wall, the lights LIM OK (green) and HTR ON (red) shuts off after being on for 2 min. Help!

It could be two things, first is the flow sensor, if it is bad the tub will shut off as it does not detect water flow and is protecting the pump(s). The other thing is the temp sensor, if it is bad, it senses the tub is to hot and shuts down so to protect the bathers from being burned. Both are are to check without the proper training and tools, find a good hot tub technician, it will run in the hundreds for testing and parts.

Mar 20, 2010 | Home

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My new heater does not work on my hot tub. I have a Jacuzzi Z135 Model s2600000 with a Controller version r574 and a Balboa 58028 that has been replaced by the 53349 heater (4 KW, 1 PSI set Pressure...

Test across both terminals at the same time. If you are getting 230V, disconnect power and check the resistance across the terminals. For 4kW, you should get roughly 13 ohms. If not, the element is bad.
If you get 0 Volts across the terminals, the tub is not heating. ManyBalboa packs switch both leads to the same leg of power, so you can get 120V to ground from each terminal, but you get 0V from terminal to terminal.
The clincher here is that the "heater on" light is off. I would double-check the pressure switch. You should test it with the tub running in heat mode. Disconnect one of the flag terminal leads from the switch, THEN test for continuity across the terminals. If you get none, you have either low flow or a bad pressure switch. You can verify by jumping the two wires together and see if the "heat" light comes on. Again, check for flow. I would run any of these tests with the filter removed. The symptoms you describe are very commonly caused by a dirty filter causing low flow. Again, pressure switch test. A bad sensor would cause the "current temp" to read too high, and a hi-limit problem would cause the little "heater-on" light to flash. Unless that little light is just dead (I've never seen it go bad), everything you say points to the pressure switch (or a dirty filter).

Nov 30, 2009 | Jacuzzi S750000 Black RapidHeat In Line...

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Where does the coil go on the inline heater?

The heater element is located inside the stainless steel tube located under or near the main control box. Unless you have experience in replacing one of these leave it to a pro. You will have plenty of places that will sprout leaks if the replacement is not done correctly.

Sep 23, 2009 | Home

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WE have an older outside model JACUCCI brand hot

Try hitting the reset button in the control box, and let me know if it fixes it it's red. And inside the timer control pannel.

Aug 06, 2009 | Home

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Water not heating

It sounds like your inline heater has stopped working. The only way to test it is to drain the water back out, remove the inline heater, and hook power to it to see if it heats up.

If it doesn't you can get one at a discount supply house (like Home Depot or Lowes) for less than $150.

May 28, 2009 | Home

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Hot tub wont stay hot

Contact Maryland Hot Tub Repair - Pool and Spa Service and set up a Diagnostic service call. Here is there contact info: Maryland Hot Tub Repair - Maryland Pool Service - Maryland Spa Repair Pool Parts - Spa Parts - Hot Tub , Pool and Spa Repair - Pool Opening - Pool Closing - Pool Service 410-304-2463 http://www.maryland-hottub-pool-spa-repa... or see them on

May 20, 2009 | Jacuzzi DX50-959 Elara 7242 Salon Spa...

1 Answer

Jaccuzi hot tub will not heat?

sounds like it maybe the heater again. Have you pulled it out and checked the ohms? it should be at least 10.5 ohms
it could be the thermostat or the pressure switch - if either of those are not working it will not heat either.

Dec 28, 2008 | Home

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