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Jacuzzi J345 heat display blinking, heating light not on

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Posted on Jan 02, 2017

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SOURCE: jacuzzi tub not heating

O ring set may be required slow job take care

Posted on Oct 03, 2009


SOURCE: No heat with Rapid Heat U395000 Jacuzzi jetted tub

when you changed the heater did you make sure you also changed out the temp sensor cause most of the time calciun builds up an is the reason for both the heater an sensor to fail calcium is ok at temps above 93.6 degrees but as soon as the temp drops below this point it will come out of solution an start to harden on the element an sensor.Always make sure to that you are getting power from the spa pack to the heater check for voltage at the main leads on the heater just because it says its on does not always mean you are getting power to the heater.Always remember with spas the problem lies where the power dies.sometimes it can even be your main top side controls they can go bad an indicate the heat is on but will not relay that to the heater.make sure you got the correct kilowatt heater also an that you have the correct one in terms of 240v or 110v also from the thousands of heaters i have replaced in spas over the years i always check to see if i am getting the correct omhs reading before i install them should be around 8-10 for a 110 an 12-13 for a 240

Posted on Mar 27, 2010

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Jacuzzi tub not heating

O ring set may be required slow job take care

Sep 18, 2009 | Home

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Continuous low speed, no heat

At this point after having spent all that money, you have to figure something else is frying those boards.

You need to make a decision whether to A: Call a Jacuzzi repair specialist

B: Replace the the control panel, the board, and possibly even the heater and pump, thermometer and sensors.

C: Cut your losses and buy a new Jacuzzi. Trade this one in on it for whatever you can get. And from personal experience, stay the h*** away from Ebay when it comes to electronics.

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1 Answer


sounds like it could be either the heating element, the thermostat or pressure switch problem. Does the light come on when it is trying to heat? if it doesn't come on then most likely the heating element needs to be changed.

Dec 13, 2008 | Home

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