Solar pump runs but there is little or no flow through the Fafco panels.

Safety: Turn off pumps and relieve pressure before disconnecting any hoses or unions.

• Check pressure differential: Compare pressure before and after the solar loop using gauges if available. A large drop indicates restriction.
• Inspect inlet screen: Locate and clean any strainers or screens at the solar feed to the Fafco manifold.
• Check hoses: Look for kinks or flattened sections in flexible hoses to and from the roof. Replace damaged hose.
• Bleed air: Ensure the vacuum relief valve is working so air can escape as panels fill. Manually open a high-point union briefly to purge trapped air if needed.