JANDY PCB# 7588C LT Pool and Spa Heater Control REV C Circuit Board Panel LTB06. Used in Excellent Working Condition. JANDY PCB# 7588C LT Temperature Heater Control Circuit Board Panel LTB06. EChecks must clear before item(s) are released. Tracking information will be available upon request. We do our best to ensure the accuracy of every listings. Unfortunately, do to our high volume, mistakes sometimes occur. Get images that make Supersized seem small. Showcase your items with Auctiva’s. Track Page Views With.