Bleeding a Baseboard Heater

Certain heating systems include automatic bleeders. If your heating system lacks such a feature, bleed the baseboard heaters once every year before the winter. Bleeding the heaters removes the air that becomes trapped inside the units. The air interferes with the circulation of hot water inside the baseboard heater. Bleeding the air out will help improve its efficiency.

Instructions

- 1
  Turn off your central heating system to stop more air from entering the baseboard heater as you bleed it.
- 2
  Hold a cup underneath the heater's air valve to catch the water.
- 3
  Turn the valve counterclockwise to open it and bleed the air.
- 4
  Wait until water trickles out of the baseboard radiator and then turn the valve clockwise to close it. You don't need to drain the water; the presence of water indicates that all of the air has bled out of the unit.
- 5
  Turn the heating system back on. Check the heater to make sure no more water bleeds out of the valve. If you do see water, you may need to tighten the valve more.

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