Solar panels make loud popping or ticking noises when heating up or cooling down.

Safety: Use caution on the roof and avoid stepping on panels.

• Inspect mounting: Check that Fafco panels are secured with approved straps and clips, allowing for some thermal movement. Do not overtighten fasteners.
• Check pipe supports: Ensure PVC lines are supported with cushioned clamps and not tightly pressed against roof edges or metal flashing.
• Bleed air: Verify that the vacuum relief valve is functioning so panels fill and drain smoothly, reducing sudden water hammer.
• Add cushioning: Where pipes contact hard surfaces, add rubber padding or adjust supports to minimize friction noise.