Getting FLO code, and No Heat! All the jets work at both speeds, drained, refilled, cleaned filters and pushed water into filter port to no avail. Can hear a pump run when I turn on at breaker for a few seconds, then it stops. Will heat if tub is left off for an extended amount of time, but then will set FLO again.
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The FLO message is a warning that your water flow is not what it needs to be. This can be harmful to your equipment, without proper water flow the heating element can over heat or your pump can run dry causing damage. Often this is can be caused by dirty filters, so your first check should be to see if your filters are clean. Other possible problems could be water levels. Make sure you have no water blockages especially on the suction end.
simple fix its one of two things you did not prime the spa when filling it meaning that u just did not lay a hose in the spa then fill it you always need to prime the heater first along with the circ pump if you do not you will get a thing call airlock which is what it sounds like air in the main circulation pump for the heater.Also could be that u removed the filter while you still had the spa running an clogged the circ pump or it could be the flowswitch. Sounds like u might have a sundance spa an if the flo is flashing its either the air lock or your pump went or its clogged if the flo sign is not flashing then its the flowswitch but in that case w/a solid flo nothing would b working. To fix the airlock just shut the power down an take your hose an force water into the intake side of the filter area this is what u should always do 1st when you fill it that how you prime yuor pump an when fillin it all the way it best to fill it through the other end of the filter just put the hose into the filter tube w/the screw on it.IF THATS NOT IT THEN FEEL YOUR CIRC PUMP IT WILL BE THE SMALLEST PUMP IN THE SPA IF U CAN NOT TOUCH IT FOR MORE THEN A FEW SECS. THEN IT WENT ON U OR IT CLOGGED
You probably need to run water into the skimmer to force air out of the suction line. sounds like one of the pumps is not priming due to air lock. When you drain the spa, get into the habit of running water into the skimmer when you start refilling it. You can get it to prime by loosening the discharge side pump union until the air is out, then re-tighten. The FL2 code is a "flow" error for the circ pump.
upper spa side control should have a heat lite, if on then heater is recieving voltage. Sometimes pump can have an air bubble in line.
Make sure water is flowing from jet. Spa will not lite heater without water flow. If no water try loosing union after pump to pull air through, so pump can fill with water, and no longer cavitate. Kirk
the jet covers normally unscrew counter clock wise .As far as the smell goes it could be clumps of old hair after time the old hair usually causes a pretty bad smell.Try snaking the drain.This might help.
You are on the right track. Be sure and chlorinate and run the jets at the same time I would let it set for at least a couple of hours running the jet intermittantly and then drain and repeat.
Sound like you have Iron Bacteria. You may want ot contact a water profeessional who can recommend ways of getting rid of the iron.
Properly Chlorinating your well would be a good first step.
What part of the country are you in>