Water leaking around the base of the furnace or from PVC venting on a high-efficiency Payne furnace.

Safety first: Turn off power before working around water and electrical components.

• Locate condensate system: On condensing Payne furnaces, find the plastic condensate trap and attached hoses.
• Clear trap: Remove the trap and flush it with warm water to remove slime and debris. Reassemble per the manufacturer's orientation.
• Flush drain line: Use a wet/dry vacuum at the drain termination to pull out clogs, or blow out the line with low-pressure air.
• Check hose routing: Ensure hoses slope downward with no sags that can hold water.
• Replace cracked hoses: Install new condensate tubing if any sections are brittle or leaking.