Original > Hot Tub Forum

The Infamous Stubborn FL1 Airlock

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nhowe29:
Sorry for the lack of a reply. It has been a scorcher out here with some severe storms in between, so I didn't have a chance to try it out.

Yesterday I finally got around to it. I unplugged the two drain plugs (one for each pump) and let them spurt out water for 10 seconds or so.

Turned the hot tub back on annnd no luck.

Could it be my flow switch that is bad? This tub is a solid 13 years old at this point.

SerjicalStrike:
You would have to look at the flow switch.  If the flow switch is closed (both the paddle and the stand are touching) and you have an FL1 error, the flow switch is bad.  If the paddle and the stand are open and you are getting the FL1, you will most likely have to replace the circulation pump. It may have been the circulation pump going bad that blew the fuse.

nhowe29:
Hi all, posting a final update so that if anyone else runs across the same issue as myself then maybe you will know where to direct yourself.

The tech came and had me restart my hot tub using the breaker. He listened for a hum almost immediately and for the footwell jet to produce movement. Only the jets eventually came on. He told me that means the circulation pump is bad.

We got down there and replaced the circ pump and all is well again.

So maybe try out that trick if you are getting unsolvable flow errors like I did.

Tman122:

--- Quote from: Sam on July 13, 2018, 02:58:54 pm ---Yeah, whatever pump is airlocked you just remove that plug and let a decent amount of water shoot out.  Sometimes they are stubborn and you need to do that a couple of times.

--- End quote ---

I have a fitting and a hose that I run back into the tub. Then you can let it run for a while with the plug removed.

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