Mine were corroded, but passed a continuity test. removing the corrosion opened a hole in one of the cases. $30/ea to replace (parts only). then i read how the brass 'screw' they contact with are prone to corrosion (salt pool), not listed in the parts manual, but are available as part# R0383200 (another $6/ea). not a happy jandy/laars/teledyne owner.
The hi limits are auto reset. pull the cover off of the side were the water connections are. Make sure the wires are connected to the sensors there are 2 . use a meter and ohm check the switches to make sure they are closed it not replace the open one
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