How to Fix a Toilet Cistern That Won't Fill
Quick Answer
Check the water supply, check the float valve, and clean the fill valve.
How to troubleshoot a Toilet Cistern That Won't Fill
A toilet cistern that won't fill can be a problem. This guide covers diagnosing and fixing the issue.
Step-by-Step Fix
- Check the water supply valve is fully open.
- Check the float valve is not stuck.
- Clean the fill valve to remove debris.
- If the fill valve is faulty, replace it.
- Test the cistern fills properly.
Common Error Codes
| Code | Meaning | Resolution |
|---|---|---|
| No water | Water supply or valve issue | Check water supply and fill valve. |
| Slow fill | Blocked fill valve | Clean the fill valve. |
Frequently Asked Questions
Why won't my toilet cistern fill?
A closed water valve, stuck float, or blocked fill valve.
Can I replace a toilet fill valve myself?
Yes, it is a straightforward DIY job.