What Is Bleeding a Radiator?
Bleeding a radiator means releasing trapped air from inside it, using a small valve, so hot water can fill the radiator completely. Trapped air causes cold spots — typically at the top of the radiator — even though the boiler and circulator pump are working normally.
Why It Matters to You
A cold top with a warm bottom on one radiator usually means trapped air, not a bigger system problem — an easy distinction that can save an unnecessary service call.
Practical Guidance
Cold spots throughout the radiator, or discolored water when bleeding, suggest a full system flush is needed rather than a simple bleed — that's a job for a professional.
Related Terms
Let's get your comfort back on track.
Tell us what's going on and our Downers Grove team will reach out — usually within the hour during business hours. For emergencies, call us directly.
Call us(630) 442-9250- Emergency Service Available
- Licensed & Insured
- 5-Star Rated by Our Customers
- Downers Grove, IL & 19 nearby towns
6308 Barrett Street, Downers Grove, IL 60516
Request your service
No obligation. We never sell your info.