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

If your toilet won’t flush and the bowl isn’t clogged, the tank parts likely need adjustment. Open the tank and check the handle, chain, flapper, and fill valve. We offer same-day plumbing help in Plano with licensed, insured techs.

• Make sure the toilet shutoff valve is fully open.
• Check the lift chain; leave about 1/2 inch slack.
• Ensure the flapper seals and isn’t warped.
• Verify water level reaches the fill line.
• Clean or adjust the fill valve.
• If parts are cracked or leaking, schedule repair.

Updated: 2025-11-06

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