Why are some of my heating zones not working?

Bleed the Radiators



Sometimes, a heating zone will not work properly because water cannot move through the baseboard radiators. This happens when an air bubble blocks the pipes. To help draw out air, locate the bleeder valves on all the radiators in the affected heating zone.

Why are only half my radiators working?

Check for Trapped Air and Bleed Your Radiators



If just one (or a few) of your radiators aren’t heating up, the most common reason for this is trapped air. If you’ve just turned the heating back on after the summer, air can become trapped in your radiators, causing them to be warm at the bottom but cold at the top.

How do you test a zone valve on a boiler?

To test a zone valve, first turn up the thermostat to its maximum level and feel and hear for hot water circulating around the heating elements. If you do not feel or hear any hot water circulating around the heating zone, pull down on the lever on the zone valve to force the valve open.

Why does my central heating work downstairs but not upstairs?

Radiators Are Hot Downstairs but Cold Upstairs



This could be caused by a blockage in the ball valve, or if there is a lack of water in the feed or expansion cistern. Quick Fix: Check the ball valve and expansion cistern for blockages, and bleed the radiator to remove any air that could be causing issues.

How do you troubleshoot a zone system?

Quote from the video:
Quote from Youtube video: Later on is tag your wires. Tag them if I have a system that has three four even more zones which means an individual thermostat. And a damper or multiple dampers serving that zone.

Why is my heat working on one floor but not the other?

Clogged Air Filters



If your heater is not blowing hot air, this is an indicator of a clogged air filter. This issue will throttle airflow into the system and create heating problems. Less airflow causes uneven heating, with the most distant rooms receiving the least amount of heat.

Why are my radiators half hot and half cold?

When a radiator appears to be cold at the top but still warm at the bottom, the usual culprit is air trapped in the heating system. There is a very simple approach to fixing this, which is to bleed the radiator. Bleeding a radiator releases the trapped air, allowing your radiator to run more efficiently.

Why is only the top half of my radiator hot?

If your radiators are cold at the bottom but hot at the top, this means the flow of hot water is being restricted or redirected; this is usually caused by a build-up of sludge. This means the hot water is not reaching the whole of the radiator while the central heating is on, leaving it cold at the bottom.

Why are two of my radiators not getting hot?

If multiple radiators in your home are cold, this could be a sign there is air trapped in the system. Air inside radiators will lead to cold spots where water can’t circulate, which will reduce their efficiency. To bleed the radiators in your home you will first need to diagnose which radiators are colder.

How do I know if my zone valve is working?

Quote from the video:
Quote from Youtube video: We can put our hand on the need the zone valve head and see if it's warm. It should be very very hot if the water is not flowing through because it's been stopped at the zone valve.

Why are some of my downstairs radiators not working?

If your downstairs radiators are failing to heat up, there could be a problem with your pump. If this is the case, it won’t be producing enough power to push the water around the heating system.

Why is my house hot upstairs and cold downstairs?

Heat rises.



Blame physics: hot air rises while cold air sinks. That means your upstairs typically gets hotter than your lower levels, even if your air conditioner’s working in overdrive.

How do you fix uneven heating in a house?

Try These Tips when Your Home is Unevenly Heated

  1. Use Your Air Vents to Reallocate Air to Needed Areas. When was the last time you looked at your vents or registers? …
  2. Switch the Fan from “Auto” to “On” …
  3. Have Your Air Ducts Checked for Air Leaks. …
  4. Add More Insulation in the Attic. …
  5. Control Different Areas with a Zoning System.


How do you balance upstairs and downstairs temperature?

Keep the air moving by turning on the fan setting of your home’s thermostat. Turn the fan from “auto” to “on”. The fan will circulate the air continually throughout the home and can help even out temperatures between floors.

How do you fix a cold downstairs hot upstairs in the winter?

If you are unable to maintain an even temperature in your house, consider the following interventions:

  1. Change Your Air Filter. …
  2. Repair and Insulate Your Ductwork. …
  3. Shell Out for a New Air Conditioner or Furnace. …
  4. Look Into Zone Control HVAC. …
  5. Investigate Your Attic’s Thermal Integrity. …
  6. Reduce Sources of Heat Upstairs. …
  7. Use Fans.


Why is my bedroom hotter than the rest of the house in winter?

First, check for these common problems: Dirty air filter—A dirty filter restricts airflow, not letting your home get enough cool air. Closed vents—Closed vents in rooms can cause them to be hotter than other rooms. Open windows—Your conditioned air can flow out of open windows, leaving uneven temperatures in your home.

Why is my room so cold compared to rest of house UK?

If there is a cold room in your house, the problem has likely been caused by dirty vents, cracked ductwork, worn insulation or faint drafts.

How do you balance the heat in a two story house in the winter?

The general rule of thumb for a two-story home is that you should set each thermostat two degrees Fahrenheit apart from the other. During the summer, when your AC is running, set the upper floor at the temperature you actually want in your home. Then set each floor underneath that to two degrees warmer.

Why does my thermostat setting not match my home’s temperature?

Sometimes when the room temperature doesn’t match the thermostat setting, the problem could be a dirt buildup in its interior parts. As part of a furnace or air conditioning tune-up, a professional will inspect and clean the wiring of your thermostat so you won’t have to worry about this issue!

Why is my upstairs colder than downstairs in winter?

Many times, the upstairs temperature will be several degrees off the main-floor temperature. This is due to faster heat loss caused by cold air in the attic and by ductwork that is too undersized to offset that extra heat loss.