20 Most Recent Jacuzzi RapidHeat In-Line Heater U395000 [ Bathtubs and Whirlpools, Questions & Answers

This is an indication of a bad circuit board. May be caused from a surge in power.
I would have a service tech come out and look at the system to determine which parts are actually nor working.
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Jacuzzi... | Answered on Nov 15, 2013

that is dirt build up in the system. run a 10 min cycle before using the tib.

Jacuzzi... | Answered on Oct 13, 2013

Heaters for jacuzzi bathtubs. Click here for a list of what will work for any bathtub.
Bath Heaters

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Jacuzzi... | Answered on Mar 18, 2013

You do not want to install any heater upside down because if any debris gets inside the heater pressure switch while it is running it will NOT shut off once the pump shuts off.

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Jacuzzi... | Answered on Feb 19, 2013

i have the same problem, checked ohm's there good at 15, why won't the rapid heat light come on letting me know t's working?

Jacuzzi... | Answered on Mar 03, 2012

You should be abl to find a PVC reducer at Lowes or Home Depot. If they don"t have the exact size they have rubber reducing boots that have strap clamps attached to them. If that doesn't work then look up a place in your area that specializes in repairs for pools and spas, they should be more than willing to sell you what you need.

Jacuzzi... | Answered on Sep 22, 2011

Two things to check...is there enough flow to trip the flow sensor in the heater...the heater will only work when there is flow sensed going through the line...it needs to be in the line diredtly off of the pump before any tee's...

Also and this may sound stupid, but stranger things have happened...
The heaters are directional and they need to be installed with the flow going the correct direction... have you tried taking it out and reversing it??? The flow may be going the wrong way...


Jacuzzi... | Answered on Aug 11, 2011

Hello Manrga,

Please check the heater element or coil of the Jacuzzi.

May be it damaged.

Jacuzzi... | Answered on May 05, 2011

In line heaters will not HEAT the water, they will only maintain the temperature inside the tub within a few degrees. You should not try to install the heater yourself, it would be best to have a plumber come over and give you a quote on how much it would be to install it. A plumber can look at the tub, see if there is a place that the heater can be CUT IN to the pipes, and install it. You likely won't get it to work. The inline heaters are required to be put on a GFCI circuit because they are powered in a wet environment. Unless your tub is not hardwired in to the house, and you actually have a GFCI circuit under the tub. But like I said, these do not heat the tub, they only maintain. And the life of these is not very long if you use soaps and shampoos in the tub while the heater is on. It won't take any time at all for the oils to build up on the elements, rendering it useless.

Jacuzzi... | Answered on May 05, 2011

I have the same problem. I talked to Jacuzzi technical support and they said that they don't sell a product that will retrofit (they make the couplings a custom size to prevent this.) It's really a drag since I really don't want to install a whole new tub just to maintain water temperature. I haven't given up so if you found a solution please post.

Jacuzzi... | Answered on Apr 15, 2011

if the heater is working then the light should be on.

Jacuzzi... | Answered on Feb 17, 2011

no it cannot. it is a pressure heater and must be installed after the discharge of the pump

Jacuzzi... | Answered on Feb 14, 2011

sounds like maybe a bad high limit switch. the high limit is set @ 112 degrees by default.
if it is turning your system off before it reaches that temperature then it is bad.

Jacuzzi... | Answered on Feb 13, 2011

there is not a thermostat on the bathtub heaters. they only maintain what temperature water you start with. they are capable of heating about 2-3 degrees an hour.

Jacuzzi... | Answered on Feb 13, 2011

Hello, I not sure if your having a problem with your current in-line heater and can't get to it to repair or replace it but, this is the most effective way of heating your tub water without adding water and I say this assuming that the heater is 220 volt and not 115volt. An on demand electric water heater would cost more money to operate then your current unit. A gas on demand heater would not function properly and would fail to provide the hot water you need. If you install a gas on demand water heater and use it to just fill your tub with hot water then you would save money in the long run and be able to use it for your whole house. Hope this information is helpful. If you have more questions please feel free to ask.

Jacuzzi... | Answered on Feb 08, 2011

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