I had the same problem. The water sensor is on a pipe running into your pump. It will have a circular clamp around it. Remove the clamp and pull the sensor out of the pipe. The wires should run into your control box. disconnect the wires and replace. My water sensor was part 7790. Not sure if you have the same one. Do an online search. bestbuypoolsupply.com has them for $50 plus 9 for shippng. Hope this helps.
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the chlorine generator is giving you a correct readout of your pool temp. however, your water temp sensor is bad. if you look at your filter pump, follow the pipe coming from the top of the pipe, until you see a metal clamp. withthe system off, remove the clamp and pul out the sensor from the pipe and replace with a new 10k ohm temp sensor. NOTE: Older Jandy systems used black temp sensors, the new sensor may be slightly larger. use a masonry drill bit to bevel the old hole out for the new sensor, and replace the wires.
Flow error code: Insufficient water flow through heater.
Common culprits: Faulty flow sensor or pressure switch - switch stuck in open position, this is the most common cause of the Flow error code. Dirty filter - try removing filter and run your system & see if the code returns. Water line blockage - Check water lines & gate valves are clear/open.
If the problem is not listed above call a local spa technician as the problem could be something for significant.
Not 56, but Sb, stuck button, check the back of the control panel for corrosion. We had the same issue and found some moisture had caused a spot of corrosion blocking the contacts. Cleaned it out and worked like a charm.
Check your SENSOR. With the Minimax ch heater, you might be using an 'IntelliTouch' panel that controls your equipment. If you are, check the reading that the panel says the water temperature is and then check the temperature of the water 'coming out' (spa??) manually with a floating thermometer. When the heater cycles off, check the difference between the 2 numbers. Say the panel says 102 & the thermometer says 95?? - that is a faulty sensor, telling the heater that the water has reached 102, so it cycles off before ever getting hot. If you're not using the IntelliTouch, you will be checking the display panel on the actual heater itself & again the floating thermometer. Now...
if the temperature is less than a 4 degree difference you can always calibrate/or have calibrated the heater.
The 126 is not an error code, but it maybe the temp of the water that the heater is reading. If the heater thinks the water is 126 degrees, it will not start at all.
If the heater is reading the wrong water temp, the problem is the Thermister, which is the sensor that is suppose to read the water temp. You will need to replace this sensor in order to correct the problem with the heater. It is really easy to do!
If you have a manual for the heater, if you go to the Replacement Parts Listing for the Electrical System, page 53 in the online version, the Thermistor is Item #9. It goes into the left side of the manifold in the to place, between the first two manifold bolts.