2011 Hot Springs Vanguard, keeps going into protection mode.

From https://www.justanswer.com/ythi JustAnswer Customer: 2011 Hot Springs Vanguard, keeps going into protection mode. JustAnswer Customer: Power light flasing white, ready light solid on green JustAnswer Customer: If I turn power off and back on, it resets and runs fine for anywhere between a few hours to a couple days, then will pop back into protection mode. TheHotTubGuy: Hot tub service and repair.: Good morning. TheHotTubGuy: Hot tub service and repair.: Sorry you're having trouble with your tub. TheHotTubGuy: Hot tub service and repair.: The flashing power light is a hi-limit error and almost always is due to poor or insufficient water flow from the circulation pump through the heater. TheHotTubGuy: Hot tub service and repair.: Since your issue takes a little time, you probably have flow.just not quite enough to keep it operating properly. TheHotTubGuy: Hot tub service and repair.: The reduced flow can be caused by several things. TheHotTubGuy: Hot tub service and repair.: I would start by making sure the water level is above all the filters and remove the filter on the gray standpipe and replace the cap. TheHotTubGuy: Hot tub service and repair.: Try restarting it and see if that stops the protection mode from reoccurring. TheHotTubGuy: Hot tub service and repair.: If that does not, try removing the floor drain (heated water exits here) and see if it is obstructed with scale or debris. TheHotTubGuy: Hot tub service and repair.: It unscrews counter clockwise and pops out. TheHotTubGuy: Hot tub service and repair.: If the water level is good, the filter is out, and the drain screen is clear.you probably have a clogged or bad circulation pump. TheHotTubGuy: Hot tub service and repair.: Replacement is probably the solution. TheHotTubGuy: Hot tub service and repair.: Standing by. JustAnswer Customer: The water level is around 2" above the filter tops, shouldn't be the issue. JustAnswer Customer: I removed the floor drain and there was some scale, but it didn't seem to be enough to obstruct the flow. JustAnswer Customer: There is flow but I'm not sure how much there should be. JustAnswer Customer: I would think there should be enough flow to disturb the surface of the water level, which there is not. JustAnswer Customer: Is this accurate? JustAnswer Customer: Is the pump serviceable? TheHotTubGuy: Hot tub service and repair.: You should see slight rippling on the surface above the floor drain.bubbles especially if you have an ozone system. TheHotTubGuy: Hot tub service and repair.: You can try to clean the circulation pump and check inside for debris. TheHotTubGuy: Hot tub service and repair.: There are 2 different pump models, old and new. TheHotTubGuy: Hot tub service and repair.: Below are pics of the two different models. TheHotTubGuy: Hot tub service and repair.: If you have the old style, probably best to replace it.especially if you are somewhere freezing cold because that's when it will fail again. TheHotTubGuy: Hot tub service and repair.: To clean or open the circ pump you will have to clamp off the water lines in/out of the pump. TheHotTubGuy: Hot tub service and repair.: I recommend draining it to make it easier. TheHotTubGuy: Hot tub service and repair.: Be careful not to break the elbow with the 1/4" tubing connected to the circ pump. TheHotTubGuy: Hot tub service and repair.: It can be brittle and can break if not handled carefully when removing the circ pump. TheHotTubGuy: Hot tub service and repair.: The old style require you remove the pump and the 4 bolts (3mm) holding it together. TheHotTubGuy: Hot tub service and repair.: If should be shiney stainless steel without a scale build up. TheHotTubGuy: Hot tub service and repair.: If you find scale, use a CLR type liquid scale remover to soak the impeller in and fill the pump bowl and let it soak. TheHotTubGuy: Hot tub service and repair.: Wipe clean with a paper towel and reassemble. TheHotTubGuy: Hot tub service and repair.: Again, probably time for a replacement if you have this style pump. TheHotTubGuy: Hot tub service and repair.: The new style has a locking ring that holds the front volute to the motor. TheHotTubGuy: Hot tub service and repair.: If you unscrew it and open it up you can see if there is debris in there. TheHotTubGuy: Hot tub service and repair.: These pump have an open impeller and usually do not have this issue. TheHotTubGuy: Hot tub service and repair.: Have I thoroughly answered your question? TheHotTubGuy: Hot tub service and repair.: If so, please leave a kind rating so I will be paid for my time. TheHotTubGuy: Hot tub service and repair.: Standing by. TheHotTubGuy: Hot tub service and repair.: Old style TheHotTubGuy: Hot tub service and repair.: New style JustAnswer Customer: It is the new style. JustAnswer Customer: I took it out and inspected it, some scale came out, but not enough to have plugged it. JustAnswer Customer: impeller looks good.