How to Fix a Radiator Not Heating
Quick Answer
Check the valve is fully open, bleed the radiator, and balance the system if needed.
How to troubleshoot a Radiator Not Heating
A radiator that is not heating at all could have a valve issue or airlock. This guide covers diagnosing and fixing the problem.
Step-by-Step Fix
- Check that both the thermostatic valve and lockshield valve are fully open.
- Bleed the radiator to remove any trapped air.
- If the radiator remains cold, check the boiler pressure.
- Check for a stuck pin in the thermostatic valve.
- If the valve pin is stuck, gently tap it to free it.
- Consider balancing the system if the radiator is still not heating.
Common Error Codes
| Code | Meaning | Resolution |
|---|---|---|
| Radiator cold at bottom | Sludge buildup | Flush the radiator or call a plumber. |
| Valve pin stuck | Thermostatic valve seized | Gently tap the pin to free it. |
Frequently Asked Questions
Why is my radiator not heating at all?
A closed valve, trapped air, or low boiler pressure.
Can I fix a stuck radiator valve pin myself?
Yes, gently tap it with a hammer or use pliers to free it.