Jet pump runs but there is very weak or no water flow from jets.

Safety first: Turn off power at the GFCI breaker before opening unions.

• Check water level: Ensure water is above all jets and suction fittings.
• Open valves: Verify that all slice valves around the jet pump are fully open.
• Bleed air from pump: Loosen the union on the pump discharge slightly until air escapes and water begins to flow, then retighten. Repeat on the suction side if needed.
• Inspect for debris: Check the skimmer basket and suction covers for blockages. Remove any debris.
• Check diverter valves: If your Marquis spa has diverter valves, ensure they are not directing flow away from the jets you are testing.
• Impeller check (advanced): If the motor runs but there is still no flow, the impeller may be broken or stripped from the shaft. The wet end will need to be opened and inspected.