Jandy VS FloPro 1.85 THP Variable Speed Pool Pump UV Error Fix: Under Voltage — Input Voltage Too Low

Error code UV on the Jandy VS FloPro 1.85 THP Variable Speed Pool Pump means: Under Voltage — Input Voltage Too Low. The incoming electrical voltage is below the minimum operating threshold for the drive — motors cannot develop proper torque at low voltage and will draw excessive current trying to compensate; causes include long wire runs with undersized conductors (causing voltage drop), utility brownouts, loose or corroded wire connections (high resistance connections drop voltage), or sharing a circuit with other high-draw equipment; check voltage at the pump terminals with a multimeter under load (while pump is running)

The most successful fix is "Test Voltage Under Load and Upgrade Wiring or Connections" (hard difficulty, ~90 minutes). Estimated DIY cost: $15-$30. HomeMD has 2 community-ranked fixes for this error.

This error is rated medium severity. It should be addressed soon, but your appliance may still function in a limited capacity.

Yes — the top-ranked community fix ("Test Voltage Under Load and Upgrade Wiring or Connections") is rated hard difficulty and takes about 90 minutes. Tools needed: T20 Torx screwdriver, Multimeter, Wire strippers, Crimping tool, Voltage tester.

DIY cost: $15-$30. Professional repair typically costs $150-$250. Many homeowners save money by trying the top-ranked community fix first.

The Jandy VS FloPro 1.85 THP Variable Speed Pool Pump has 8 other known error codes, including: CE (Communication Error — RS-485 Link Lost), E1 (Internal Drive Fault), FLOW (No Flow Detected), MECH-01 (Mechanical Seal Leak), MECH-02 (Motor Bearing Noise), and 3 more.

Error code UV also appears on 1 other Jandy model: ePump 2.7 THP Variable Speed Pool Pump with Digital Control. The fix may vary by model, so check each model's specific page for tailored repair steps.