How to Fix One Radiator Cold While Others Are Fine
Quick Answer
Bleed the radiator, check the valve, and balance the system.
How to troubleshoot One Radiator Cold While Others Are Fine
A single cold radiator when others are hot indicates a specific problem. This guide covers diagnosing and fixing the issue.
Step-by-Step Fix
- Check the thermostatic valve is open.
- Bleed the radiator to remove trapped air.
- Check the lockshield valve is open.
- If the radiator is still cold, the pin in the thermostatic valve may be stuck.
- Gently tap the pin to free it.
- Consider balancing the system.
Common Error Codes
| Code | Meaning | Resolution |
|---|---|---|
| Cold at top | Trapped air | Bleed the radiator. |
| Completely cold | Stuck valve | Free the valve pin. |
Frequently Asked Questions
Why is one radiator cold when others are hot?
Trapped air, a closed valve, or a stuck valve pin.
How do I free a stuck radiator valve pin?
Gently tap it with a hammer or use pliers.