commercial boiler services, boiler inspection

What Happens During a Boiler Inspection?

Boiler Inspections

During boiler inspection, the technician will inspect the equipment for wear and tear. They will also clean the boiler and all its parts, including the burner, heat exchanger, and controls. The technician will also check the boiler’s combustion and adjust it as needed. They will also test the pressure relief valve and ensure it works properly. Finally, they will inspect the venting system to ensure it is not blocked and that all connections are tight.

Develop a Maintenance Plan

A maintenance plan ensures your boiler is properly taken care of. It includes a schedule of when maintenance should be conducted and a list of tasks that need to be completed. Up-to-date records of previous maintenance and repairs should also be kept to see what actions were taken and when. If you don’t have a maintenance plan, your HVAC technician can help you create one. Ensure the technician updates the records after each visit to have a detailed record of what was done.

Inspect the Burner

The burner is the part of the stove that produces the flames. The technician removes the burner to check and easily access the combustion chamber.

Check Flue Passages

If you see soot in the flue passages, there isn’t enough air for the fuel to burn properly, or the fuel mixture is too rich. If you see moisture, it means that the system is running at a temperature that’s too low.

Check Vent Pipes

You should check your vent pipes to ensure they are clear and not blocked. You should also look for any white powdery residue indicating condensation in the pipe. This can damage the pipe, so it is important to make sure that the technician adjusts the stack temperature to prevent this from happening.

Assess Proper Fan and Blower Function

Ensure that the fans and blowers that circulate heated air are clean and in working order. Clean the fans and, if necessary, lubricate them to ensure they are spinning properly.

Inspect Valves and Switches

Check that the block valves are in good condition and functioning properly. Ensure the combustion air-proving switches will open by removing airlines. Test the purge timer and adjust it if necessary to ensure it is still at the correct factory setting.

Analyze Flue Gas Composition

This test aims to ensure that the concentrations of oxygen, carbon monoxide, and carbon dioxide in the flue gases are all within the acceptable range. In most cases, the ideal concentration of carbon dioxide should be around eight to ten percent. Additionally, the concentration of carbon monoxide should be less than 20 parts per million. Finally, it is important to ensure that the combustion chamber is properly sealed to avoid any gas leaks.

Evaluate Operator and High-Temperature Limit

The boiler should be equipped with controls that will shut off the burner if the internal temperature gets too high. These controls should be checked to make sure they’re working properly.


A boiler inspection is a process that a technician uses to check the safety and efficiency of a boiler. The boiler inspection includes checking the boiler’s pressure, temperature, fuel supply, and exhaust. The technician also checks for leaks, corrosion, and other signs of wear and tear.

Bay Area Mechanical specializes in maintenance contract work for commercial and industrial facilities, which includes the servicing, repair and installation of boilers, chillers and a variety of other HVAC systems. Our boiler inspection services guarantee to keep your boiler working for decades to come. We ensure your preventative maintenance is performed properly, to minimize service interruptions and comply with all local and state ordinances. Call us at (888) 596-9226 for a boiler inspection in the Bay Area!

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