The Balboa Instruments NAN 502 Part Number 55089 was used in some Chinese-imported spas. As it was a custom system for that manufacturer for a limited time, replacement PCBs and Touchpads are basically non-existant. The 53938 (and other) touchpads on the NAN system are not compatible with standard VL401/403 touchpads.
Your best option is to replace the NAN502 system with the GS501z Kit listed here.
NAN502 Touchpad / Key Pad / Control Panel / Circuit Board / NANTNG / Super E4 Duplex
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Heater & Spa Parts has Australia’s largest range of spa spare parts, supplies, and pool heaters from top brands. We're a real store with real stock—not just another drop-shipper.
We're 100% Australian-owned and operated, with warehouses in VIC, NSW, QLD & WA, and we ship faster than anyone. We have a physical retail store at 10 Industry Blvd, Carrum Downs, Vic.
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With over 50,000 parts across 5,000+ product lines, we stock everything from filters, pumps, jets, chemicals, heaters, touchpads, control panels, and more—plus manuals and expert info to help you out.
We stock and supply parts from all the major brands: Aeware, AquaFlo, Astralpool, Balboa, CG Air, CMP, Darlly, Davey, Del Ozone, Edgetec, Fluidra, Gecko, Hurlcon, Jandy, LX, Madimack, Magnum, Pentair, Raypak, Rheem, SpaNet, Spa-Quip, SpaPro, Waterco, Waterway, Zodiac—and many more.
Our parts are compatible with popular spa brands including Alpine, Arctic, Artesian, Bullfrog, Caldera, Cyclone, Decina, Dimension One, Endless®, Fisher, HotSpring, Just Spas, LA Spas, Maax, Monarch, Oasis, Sapphire, Signature, Sundance, Vortex® and dozens more.
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