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Intermittent FLO Error


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Hi All,

Firstly thank you in advance for any advise you are able to give, I have searched through the forum to find a solution to my problem but to no avail, I'm a newbie so if you need further information just let me know.

We recently purchased a house which has a hot tub that hasn't been used in years, firstly it leaked which has now been resolved.

Next up is an intermitted FLO error, when the tub is first turned on you can put the jets and blower on straight away and everything works but then switches off after a period and shows a FLO error (not flashing).

If you increase the temperature then it will work and circulates until it gets up to temperature, as soon as it gets to temperature it shuts off and shows a FLO error again.

I have removed the filters, I have refilled the tub filling it up from the skimmer inlet so there is no air lock. I have used a hose down the filter inlet to try and push an airlock out, therefore I don't think its an airlock.

I read on here it could be because it's not on 50hz but it looks like it is, therefore I'm at a bit of a miss as to what's wrong. 

I have included all the pictures I can, I have 2 pumps, the one behind the control box circulates and has a second speed when you turn on the Jets, the second pump comes on when you turn the other jets on.  I should also note I'm in the UK.

Many Thanks,

Gary

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It sounds like a shorted pressure switch. The gray thing that screws into the heater tube, 3rd from last pic. Follow the wires back to the board and, when it is showing flo, unplug it from the board. If the flo goes away you need a pressure switch.

That said, that board looks pretty rough. It may be a board issue.

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