Troubleshoot a boiler vent damper by removing rust and debris from the part, seeing if the door or draft hood cover are faulty and replacing the damper if it is flawed. Licensed technicians are needed to deal with any combustion process problems resulting from a flawed damper.
Sometimes rust and debris affect the smooth operation of a damper, preventing it from opening and closing due to changes in air pressure. Get the rust removed from the surfaces of the boiler and combustion chamber. Remove any loose debris clogging the damper or vent.
Parts of the damper, such as the door or the hood cover, can be flawed or broken. For instance, because the door is weighted to open due to changing air pressure, the door may need to be readjusted or re-weighted if it doesn't open properly. A hood cover that isn't installed at the right distance from the burner can prevent the damper from working. It must be removed and placed at the specified location.
A damper vent is used in boilers to regulate the release of gases. Air pressure opens and closes the damper's door, allowing gases to flow away instead of building up in the house. If the damper doesn't work properly, dangerous gases, such as carbon monoxide, can harm residents.