its not the water level – I took out the filter and there was a plastic type cover 3/4 over the grey thing with all of the holes in it – I assume something that should have been removed during installation. The filter keeps popping off – if I turn it tighter then we get the error message so at this point I have no ideas other than we have been getting this error a lot when the filter it installed but if the filter is removed or pops off the error goes away.
Open Flow Switch – Proper flow of water is inhibited or a flow switch has malfunctioned. Check for proper water level or a clogged filter. Your heater is deactivated and your filter and/or circulation may also be deactivated.
If condition persists contact your Sundance® Spas dealer or qualified service technician.
Please note the Open Flow Switch message can also appear if the pump has not been primed after the spa has been drained and refilled. If you suspect that this is the case, see the instructions in your owner’s manual.