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johnnymartinAug 6, 2025
Why is the YELLOW monitor light flashing on my Royal Prestige Water Filtration System?
- RRodney TorresAug 6, 2025
The yellow monitor light flashes because the cartridge is nearing the end of its capacity and will soon need replacement. Contact your Authorized Royal Prestige Distributor to order a new cartridge. Replace the cartridge and battery when the RED light starts blinking.