Quick answer
First, check for a clogged toilet or a stuck float. If the water level is too low, adjust the float. For a clog, use a plunger or toilet auger. If the fill valve is faulty, replace it.
Confirm the symptom
- Toilet handle doesn't move or feels stuck
- Water doesn't enter the bowl when flushed
- Toilet doesn't siphon water out of the bowl
- Toilet tank doesn't fill after flushing
- Toilet handle moves but no water flows
Tools and prep
- Rubber gloves
- Toilet plunger
- Toilet auger (snake)
- Adjustable wrench
- Screwdriver
- Bucket
- Turn off water supply to the toilet
- Wipe up any standing water before starting
Step-by-step troubleshooting
- Check for a Clogged ToiletDo: Use a plunger to try to clear the clog.Observe: Water should start to drain from the bowl.Means: The clog is cleared or partially cleared.Next: If water doesn't drain, proceed to the next step.
- Use a Toilet AugerDo: Insert the auger into the toilet bowl and crank the handle to break up the clog.Observe: You feel resistance and then it gives way.Means: The clog is cleared.Next: Flush the toilet to see if it works.
- Inspect the FloatDo: Check the float in the tank to see if it's stuck or set too low.Observe: The float moves freely and is at the correct water level.Means: The float is functioning properly.Next: If the float is stuck, adjust or replace it.
- Adjust the Water LevelDo: Adjust the float so the water level is about 1 inch below the overflow tube.Observe: The water level rises to the correct height.Means: The water level is set correctly.Next: Test the toilet by flushing it.
- Check the Flapper ValveDo: Ensure the flapper valve is opening and closing properly.Observe: The flapper opens when the handle is pressed and closes after flushing.Means: The flapper is working correctly.Next: If the flapper is damaged, replace it.
- Inspect the Fill ValveDo: Check the fill valve for any signs of damage or blockage.Observe: The fill valve is functioning and allowing water to flow into the tank.Means: The fill valve is working properly.Next: If the fill valve is faulty, replace it.
- Test the ToiletDo: Flush the toilet to see if it works properly.Observe: The toilet flushes completely and refills the tank.Means: The issue is resolved.Next: If the problem persists, consider calling a professional.
Common causes
| Cause | Likelihood | Difficulty | Part often needed |
|---|---|---|---|
| Clogged Toilet A blockage in the drain pipe prevents water from flowing out. | Common | Easy | Toilet auger |
| Stuck or Low Float The float controls the water level in the tank. If it's stuck or set too low, there's not enough water for a proper flush. | Common | Easy | Float assembly |
| Faulty Flapper Valve The flapper valve allows water to flow from the tank to the bowl. If it's damaged or not sealing properly, the toilet won't flush correctly. | Sometimes | Easy–Medium | Flapper valve |
| Faulty Fill Valve The fill valve controls the water entering the tank. If it's not working, the tank won't refill, preventing a proper flush. | Sometimes | Medium | Fill valve |
| Broken Toilet Handle A broken or disconnected handle can prevent the flushing mechanism from working. | Rare | Easy | Toilet handle |
| Clogged Vent Pipe A blocked vent pipe can prevent proper air flow, leading to flushing issues. | Rare | Hard | Professional service |
| Damaged Trapway Cracks or damage in the trapway can block water flow. | Rare | Hard | Toilet replacement |
Parts matching
Common parts needed for a toilet that won't flush:
- Toilet plunger
- Toilet auger
- Float assembly
- Flapper valve
- Fill valve
- Toilet handle
Purchase parts that match your toilet model for the best results.
When to call a professional
- The toilet still won't flush after trying all troubleshooting steps
- There's a persistent clog that can't be cleared with a plunger or auger
- The toilet is leaking water continuously
- You notice cracks or damage to the toilet bowl or tank
- The problem is related to a clogged or damaged vent pipe
- You're unsure about how to proceed with repairs
FAQ
Why won't my toilet flush even though the tank is full?
The flapper valve may not be opening properly, or there could be a blockage in the drain pipe.
Can a low water level in the tank cause flushing issues?
Yes, if the water level is too low, there may not be enough water to create a proper siphon for flushing.
How do I know if my toilet's float is stuck?
If the float doesn't move freely or is set too low, it can prevent the tank from filling properly.
What should I do if the toilet handle is broken?
You can temporarily fix it by tying a string or wire to the flapper, or replace the handle entirely.
Why is my toilet making noise but not flushing?
A faulty fill valve or a clog in the drain pipe can cause noise without a proper flush.