Same-Day Service7 Days a WeekFree Estimate
715 Heating
715 Heating
Heating · Wisconsin

Radiators Not Heating

Cold radiators in a house that's otherwise heating usually point at one loop rather than the boiler, so call and mention which rooms have gone cold.

Tap to CallNumber arriving soon

When this becomes an emergency

What a pro does

A cold radiator with a working boiler behind it is a distribution problem, and distribution problems are mostly about air and flow. Air rises to the high points of a hot-water system and parks there, which is why the top of a radiator goes cold first and why the upstairs of a story-and-a-half loses out before anything else. A tech purges the loop properly and then looks at why the air got in. Circulators fail quietly too. A pump that spins without moving water, a zone valve stuck partway, or a flow check hung open all produce a cold zone with a perfectly healthy boiler sitting there making heat nobody's receiving. In a place that runs on setback half the year, a seized zone valve found in November usually hasn't moved since the last thaw.

Frequently asked questions

Air collects at the highest point in the piping, and that's typically the upper floor. It's the first place to lose heat when a system takes on air and the last to recover after a purge.
Frequently, yes. Air that keeps coming back after a purge usually means makeup water is entering to replace water that's leaving, and finding that leak matters more than bleeding again.
Absolutely. One valve typically serves a whole loop, so a stuck one leaves every radiator on that loop cold while the other zones behave normally.
It's worth handling before deep winter. A room allowed to sit cold all season is where pipes freeze first, particularly along an outside wall.

Radiators Not Heating?

Get connected with a local pro now.

Tap to CallNumber arriving soon

Keep going

Heating in WisconsinBoiler Leaking WaterEmergency Heating RepairFurnace Blowing Cold AirFurnace Making Loud NoiseFurnace Short CyclingHeat Pump Frozen OutsideNo HeatPilot Light Keeps Going OutThermostat Not Working

disclaimer: 715 Heating is a free service to assist homeowners in connecting with local service providers. All contractors/providers are independent and 715 Heating does not warrant or guarantee any work performed. It is the responsibility of the homeowner to verify that the hired contractor furnishes the necessary license and insurance required for the work being performed. All persons depicted in a photo or video are actors or models and not contractors listed on 715 Heating.

Same-day and 24/7 emergency services are subject to provider participation, location, technician availability, and demand. Availability is not guaranteed and may vary by market and appointment capacity.

We use cookies and session-based analytics, including session replays (with form inputs masked), to improve this site. See our Privacy Policy.

About · Contact · Privacy · Terms · Disclosure · Sitemap

© 2026 715 Heating. All rights reserved.