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Code flashes fl1 and heater does not go on - Home

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Posted on Aug 02, 2013

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I installed a new heat sensor in a jandy pool heater. It is still flashing an FL1 code.


Sounds like you have an LJ Laars heater. The heater is old and it is very likely that the board is having trouble reading the sensor. All the boards are very expensive, might not be worth saving the heater. You may end up replacing more than one board. The sensor should be tested before changing the power control board, R0366800.

Mar 14, 2017 | Jandy Pool & Spa

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Jacuzzi j355 hot tub FL1 code flashing on control panel


sounds like the recirculation pump isnt working FL1 means no Flow pump 1

Aug 24, 2014 | Jacuzzi Pool & Spa

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FL1 error


FL 1 normally means shorted temp sensor

Jul 18, 2014 | Jandy Laars Lite 2 Pool Heater 250,000 BTU...

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Jacuzi hot spa reason of FL1error


FL1 is an open flow switch error. That means you have poor or no flow through heater (air locked,bad, clogged, or scaled circ. pump, clogged filter, ect) or a bad flow switch. I hope this helps =)

Nov 07, 2013 | Jacuzzi Pool & Spa

1 Answer

Failure Code FL1, what problem is associated with this code?


temp sensor malfunction. faulty sensor or water temp is too cold or too hot

Aug 23, 2013 | Jandy Pool & Spa

1 Answer

My jacuzzi is flashing FL1 and the heater isnt coming on


FL is a "flow" issue. Check the filter to make sure it is clean. Start by removing it from the tub and see if that solves the error. The next item to check is the gate valves to make sure they are open all the way. There are usually one on either side of the pump and control box.

Rod
US Parts Center

Aug 19, 2013 | Jacuzzi Home

1 Answer

FL1 fault code


Definition of FL1 = Water flow problem, inhibited or pressure switch malfunction. Check for proper spa water level and ensure pump is primed. Check for clogged filter.
Its likely to be your pressure switch (screws into heater tube, usually two wires) If this is blocked or has failed the heater will not turn on.

Jul 18, 2012 | Dream Maker Spas Pool & Spa

1 Answer

Getting error message FL1 on face plate


check filters then pressure switch then copper tube going to pressure switch

Sep 04, 2011 | Jandy Laars Lite 2 Pool Heater 250,000 BTU...

1 Answer

Code FL1


hi, this generally means a flow error and shows when the heater is looking to heat but there isn't enough pressure running through the heater tube. in this case the thermal overload sounds like it has tripped in the pump.

Jun 06, 2009 | Qca Spas Majestic Series Aruba Xl Hot Tub

1 Answer

Jacuzzi hottub flashes f1 code. Tried hose in heating element and new filter.


The F1 code on my Jacuzzi is just the setting for the filteration mode. If you press the + and the - sign at the same time than release. Then press the warmer + or cooler - to select filter mode F0 thru F6. If you are getting a FL1 code means the flow switch is malfunctioning.

May 05, 2009 | Jacuzzi Home

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