Dirty filter cartridge on circulation pump for Jacuzzi J325 Hot Tub. How do you clean it?

When you say the pump won't start back up, do you mean the electrical side of things and there is just no power going to the pump. Or are you saying that the pump is on but not pumping water.

I am going to think you mean the pump is on but not moving water. This is common after you clean and drain your hot tub. You have what is referred to as an airlock in your hot tub line. It is easy to remove the airlock by simply opening one of the unions near the pump. This will allow the air to release and water flow to begin again.

Make sure also that you have cleaned the hot tub filters, if they are dirty and reduce water flow that could shutdown your hot tub pump as well.

If it is the electrical side of things make sure your GFCI has not tripped and maybe you just need to reset this. If it is anything further on the electrical side make sure you involve a professional.

• open a union to release any airlocks.
• clean your hot tub filters.
• check to make sure your GFCI is not tripped.

Hot Tub Repair 101 What is an E6 or Error 6 Code Mean
You may have to change your hot tub filters as well and can find an assortment of filters here. The filters should be changed yearly, and cleaned monthly.
Hot Tub Filters

What is the problem you afe having with your Jacuzzi Water Heater?
Is this a Jacuzzi Hot Tub?-- Do you have some indicator lights on?-- what color are the lights?--
Is the Circulating pump running water thru the heater element?
Tell me more!-- Let's walk thru the system, and figure it out-- Mack B

There are several things that can cause this problem. The first is you just have a bad breaker, next is your heater unit is bad, lastly the pump motor could be bad. There is also the possibility that the motherboard is bad again.

FLO Codes can be a nightmare.

What part did you replace? The Pressure switch?
If so try adjusting the the pressure switch. These switches typically have a dial on the side or they'll have a spot in the top where a screw driver can be used to adjust the sensitivity.

Or:
Dirty Filters can cause FLO error, try operate the spa with out the filter cartridge it if works its the filter.
Check that all slice valves are completely open & all suction and skimmer lines are clear of debris.
Check that pump impeller is working properly.
Hope that helps

Check your suction plumbing to be sure it is sealed and tight. Then force some water through the pipe to see if anything is blocking it.

FL could be a code for low flow. If you have no circulation this sounds like it. If your pump runs and you have no flow you could have a problem with your pump. Or if you have the tub drained then it could be an air lock, if you open the drain valve till you get water out that should fix that. Also check to be sure the isolation valves are open under the spa. I hope this helps.

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.

bleed pump check fuses and connections

Pour some chlorine bleach , not alot.in and let it circulate. You may want to clean the filter first.You are smelling a real dirty filter.

Your circulation pump isn't working you should see the flow awitch closing if you have the visible model and hear the pump running.. If its the smaller circulation pump model it needs replacing