Pump lid is difficult to remove and there is strong vacuum when opening

Safety first: Turn off power and release pressure via filter air bleed before opening the pump lid.

• Check return valves: Ensure all valves on the return side are fully open to allow adequate flow back to the pool.
• Clean filter: Backwash or clean the filter to reduce backpressure that can increase suction at the pump.
• Inspect return fittings: Check pool return jets for obstructions such as leaves or toys. Remove any blockages.
• Review system sizing: If the pump is significantly larger than the return plumbing can handle, consult a pool professional about resizing the pump or upgrading the plumbing.