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Hav a jacuzzi 325 and it is flashing fl1 how to fix...

Changed filters and water wont heat and flashing fl1 what do we do to fix

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Posted on Jan 02, 2017

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SOURCE: jacuzzi hottub flashes f1 code. Tried hose in

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.

Posted on May 29, 2009

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SOURCE: jacuzzi whirlpool hot tub, flashes Fl-1 has new filters,

Sounds like a bad heating element. This is located in a stainless steel tube under or around the main control box behind the cover around the tub. It is not hard to replace but should be done by a pro. The part is avaliable online.

Posted on Sep 28, 2009

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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

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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 =)

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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.

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Hot tub in EC with light flashing


Ecn or Ec Message
Ecn or Ec Message

If the Ecn or Ec Message is Alternating with the Water Temperature on the Display, the Spa is Operating in the Economy Heating Mode.

If the Ecn or Ec Message is ON Solid (Not Flashing) on the Display, the Spa is Operating in the Economy Heating Mode, but there is No current water temperature because the Spa is between Filter Cycles.

Ecn or Ec is Alternating with Temp:
The Spa is Operating in the "Economy" (Ecn or Ec) Heating Mode.

The Water Temperature is Sampled Only during Programmed Filter Cycles. The Heater will Only operate and Heat up to Set Temperature during the Filter Cycles. The Water Temperature will probably drop Below Set Temperature between Filter Cycles. Other Heating Modes are Standard, Standard in Economy, and Sleep Modes.

Ecn or Ec is ON Solid (Not Flashing):
The Current Water Temperature is "Unknown" (- - - or - -) while in Economy or Sleep Mode.

Between Filter Cycles, while in the Economy or Sleep Heating Modes, the Pump has not turned ON and the Last Water Temperature is not Current. To read the Current Water Temperature, either Change to Standard Heating Mode or turn On the Heating Related Pump, and wait at least 2 Minutes.

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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.

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We have a hot tub or jacuzzi inside or on the side of our pool. We had a new heater installed. The jacuzzi should heat up very quickly but now the pool tech claims the drain from the jacuzzi is blocked,...


Is the equipment to heat and filter the hot tub separate from the pool equipment or do both bodies of water share a common heater and filter pump? In most cases they share a pump and heater with valves that direct the flow of water depending on how the pool owner wants to use the pools.

The first thing you need to determine then is if the equipment is working properly. Is there flow of water to and from the spa? If so, is the heater burner kicking on? If it is running, is it running properly with sufficient gas pressure, 3-4" tall bright blue flames and stays on continuously during the heating cycle for the spa?

What is 'very quickly' for the time to heat the water? In other words, if everything appears to be operating normally but the water is not warming fast enough or at all how much time is elapsing before deciding the heater is not working?

How old is this equipment and how much experience do you have with this pool tech or the company they are from?

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Jacuzzi hot tub model J-300 series with an FL-1 code. I have shut off power at box and restarted a couple of times and the circulation pump reset. Now the reset won't happen. Both pumps still operate and I...


A flashing “FL1” display means the flow switch is
malfunctioning open, the filter cartridge is excessively
dirty or an “air lock” condition has occurred at the
circulation pump intake.

Jan 06, 2010 | Jacuzzi Signa 6 Whirlpool JAC-B540...

1 Answer

Jacuzzi whirlpool hot tub, flashes Fl-1 has new filters,


Sounds like a bad heating element. This is located in a stainless steel tube under or around the main control box behind the cover around the tub. It is not hard to replace but should be done by a pro. The part is avaliable online.

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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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