Boiler Maintenance

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Boiler Maintenance Service

Maintenance Improves Boiler Efficiency

Dirty System Water

Dirty hydronic heating water will not absorb as much heat as clean system water.

Dirty system water will also reduce the heat exchanger’s ability to transfer heat into the dirty water.

Dirty Heat Exchanger and Heating Surfaces

From the repeat firing of the boiler in the heating season, the heat exchanger will collect soot and other combustion byproduct. This will help insulate the heat exchanger and act to reduce its ability to transfer heat to the system water.

Boiler maintenance will include cleaning of these boiler systems and therefore improve the ongoing performance and efficiency of the boiler.

Boiler Maintenance usually Involves Several Service Tasks

Your Boiler Will Receive The Following Services During a Scheduled Maintenance:


  • Clean and inspect the heat exchanger for wear and tear
  • Check and clean the burner assembly
  • Test the low-water cutoff
  • Ensure all electrical wiring is intact and joint/pipe connections are secure
  • Test water pH levels to make sure they are in a safe range
  • Clean, flush and inspect condensate systems
  • Make sure the system fires up properly, by testing and clean sensors, ignitor, and burner assembly
  • Check piping for any signs of leakage or deterioration
  • Check the venting system for deterioration, corrosion, or blockage
  • Check settings and test safety and operating controls
  • replace the oil filter if applicable
  • If system water is dirty, power flush the system piping to maintain efficient water flow
  • Check for correct boiler operation once the boiler has been cleaned and examined
  • Perform a combustion analysis when appropriate

Why High-Efficiency Boiler Maintenance is Important

High-Efficiency Boiler Service

High-efficiency boilers especially benefit from the right maintenance because of the technology inside—some achieving upwards of 96 % efficiency. The intense conditions within a high-efficiency boiler should be checked to maintain its peak efficiency and to prevent things from adding up and causing major failure:


  • The combustion and extreme temperatures created in the heat exchanger in order to heat the water can lead to residue.
  • Rapid temperature changes form condensation and combustion byproducts that can lead to drainage clogging.
  • A byproduct of the combustion process can mix with condensate and raise pH to damaging levels.
  • The repeated firing of the boiler flame wears on the flame rod sensors the boiler depends on.
  • Air intake pipes can accumulate debris and can stall the system.
  • The air intake pipe or vent could be clogged causing your system to occasionally stall out or lock out which will leave you without heat or hot water.
  • Water levels must be maintained properly to prevent permanent damage.

When Should Your Boiler have Maintenance?

Your boiler can be maintenanced at any time, but boiler maintenance is something you typically want to schedule in advance. So, it is best to schedule the servicing at a time you rely less on the boiler’s heat.

Ideally, you should think about scheduling the maintenance toward the end of the summer or early fall before you start using it for the upcoming heating season.

Should necessary repairs or a boiler replacement need to be made, there will be time to complete them and your heating will not be compromised by any downtime.

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