Pool and Spa
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issue. First I’ll need some more info so I have a more complete picture of your situation.
Do you have a multi-meter?
Ok, do you have the manual?
Here's a troubleshooting flow chart. http://www.jandy.com/~/media/zodiac/global/downloads/l/l0747.pdf
Start at bottom right corner
Terminal is on the control board.
I'm logging off for the night. Here's a link to the manual. Parts are identified on the parts blow up on page 28 & 29http://edc.poolsupplyworld.com/wpdf/jandylxltpoolheater-manual.pdf