Original > Hot Tub Forum
Flo error, Sundance Maxxus 2001, have replaced circ motor and flo switch
SerjicalStrike:
Ok, you have the wrong filter. You have a 2002+ Maxxus. With the filter you have, when the 2 speed pump is on, it sucks water out of the circulation pump.
Try taking the filter out and running it and see what happens.
If the circulation pump is air bound, you would need to put a hose up against the grate where the nipple of the filter normally goes and run some water through there.
If that doesn't work, is there a way you can verify that the circulation pump is actually running? Can you hear or feel it running? Can you put a meter on it and make sure it is getting 240v?
Mrs Solomon:
First, you are correct - it is a 2002 model. I am and feel like an idiot. I purposely looked at the label on the interior and still got it wrong. Sorry.
I can run it without the filter installed and the paddle does not contact the post in the flow switch. With both low and high speed on pump one the paddle does not contact the post. With all three pumps running the paddle does not reach the post.
I was able to measure the circ pump and it is getting 240v, or thereabouts. I got 115 or so on one of the contacts/wires/posts, and 125 or so on the other.
I am guessing that the water coming out of the heating unit is being restricted somehow. When I turn the tub on at the fuse box and the circ pump kicks on, a few bubbles come out of the heating port, but it is like they are dribbling out. When I place my hand over it, I can feel water exiting, but the rate does not noticeably change when pump one is turned onto low, nor is there much increase when pump one is on high.
SerjicalStrike:
Ok, we can forget about the 2 speed pump now. The main pumps you can turn on and off will have no effect on the circulation system.
When you check for voltage on the pump, you need to put one lead on the white wire, and one lead on the black wire, and test for ~240v.
If you get ~240v, you can try shutting the spa off and running some water through the place where the nipple on the filter slips into, not the side with the pipe. You can even wrap a small rag around it to make sure the water shoots through the circulation pump and out of the heat return. Try that for a minute or two, then turn the power back on.
If that still doesn't work, the next step is to get a length of hose and bypass the heater and see if that helps. We can go over that in more detail once we get there.
Mrs Solomon:
I checked the voltage and got ~245v or so. Then I shut off the spa and ran water where you suggested. There is a grid pattern in the plastic there, right? I used a rag to block as much of it around the hose as I could, and then ran water. I could see, I think, water coming out of the other side, the pipe side of the filter basin, at least at first. Then, after two minutes, I turned the tub back on, but there was no noticeable difference with the flow switch.
Thanks again for your help.
SerjicalStrike:
Ok, so the next step is to see if there is a kinked hose or something is blocked.
In order to do that, you will need to shut the spa off and start bypassing things. For this you will need a 3-5' length of 3/4" tubing and a plug that will fit inside of that size tubing. You may also want to snag a #11 winterizing plug to make things easier. Before you start each project, you can install the winterizing plug in the same spot you put the hose, the section with the grate. Just remember to remove it after everything is hooked back up and you are ready to turn the power on.
Remove the hose that is attached to the right side of the flow switch. Plug that hose and install the length of tubing onto the flow switch. Run the hose over the top of the shell back into the water. Turn the spa back on and see if that fixes it.
If it doesn't, put the hoses back to the original setup. Next, we have to rule out the heater. You will need to attach the length of 3/4" hose from the top of the circulation pump directly into the left side of the flow switch. Before you turn the power back on, you will need to disconnect the heater from the circuit board so that it does not turn on. There is a red and black wire that goes from the heater to the board. Just unscrew the screws holding them to the board and secure them out of the way.
Hopefully one of those 2 methods work. Let us know
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