What should I do if my toilet won't flush but is not clogged?

If your toilet won’t flush but isn’t clogged, check the tank hardware and water supply. Most no‑flush issues come from a closed valve, low water level, a sticky flapper, a misadjusted chain, or a faulty fill valve.

Quick checks:

• Open the shutoff valve under the tank fully.
• Lift the lid; set water level near the overflow tube top.
• Reseat or replace a warped flapper.
• Give the chain slight slack so the flapper lifts fully.
• Aim the refill tube into the overflow.
• Tighten a loose handle.

Updated: 2025-12-29 00:00:00

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