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Just One Appointment a Year Can Lower Your Heating Costs, Prevent Breakdowns & Improve Safety

Having your furnace maintained every year pays off in increased efficiency, lower energy bills, and longer equipment life. An annual inspection can identify small issues that can turn into big headaches if your furnace breaks down right when you need it most.

Safety is also a concern with your furnace. The combustion process needs to be checked yearly to ensure safe operation. Gas leaks, high carbon monoxide levels, and improper drafting can be dangerous if not addressed.

Get peace of mind by scheduling your furnace tune-up now.


What’s Included in Your Furnace Tune-Up?

Our licensed HVAC technician will start by asking you a few brief questions about your system’s performance and if you have any specific concerns. From there, he or she will perform an inspection and tune-up of the entire system, not just the outdoor unit.

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Althoff 22-Point Furnace Tune-Up

  • Verify accuracy and proper operation of the thermostat
  • General observation of all venting and ductwork
  • Measure draft pressure of the water heater to ensure safe operation
  • Perform combustion analysis on the water heater to ensure safe and proper combustion
  • Measure ductwork system static pressures and evaluate them against benchmark levels
  • Perform combustion analysis on the furnace to ensure safe and proper combustion
  • Measure and verify proper temperature change at the system
  • Take amp draw of the blower motor
  • Take amp draw of the inducer motor
  • Check blower motor capacitor for proper microfarad level
  • Observe condition and balance of the blower motor and wheel
  • Clear condensate drain and ensure proper operation
  • Remove and clean the flame sensor
  • Perform a visual inspection of the burners. If the carbon monoxide levels dictate, pull and clean.
  • Perform a visual inspection on the heat exchanger
  • Take an ohm reading on the hot surface ignitor
  • Remove and clean the pilot assembly
  • If applicable, replace the thermocouple
  • Clean condensate trap for high efficiency furnaces
  • Vacuum the inside of the furnace cabinet
  • Check and tighten all electrical connections
  • Replace fiberglass filter

All inspections include a service report with a prioritized list of recommendations (if necessary). Our goal is to leave the system working safely and more reliably but also improving performance.

What’s a combustion analysis?

Unlike many companies doing furnace and boiler inspections, every heating system tune-up done by Althoff Industries includes a combustion analysis. We do it because it’s the only reliable way to assure the efficient and safe operation of your gas fired appliance.

Our technicians are equipped with an electronic combustion analyzer that measures oxygen and carbon monoxide levels along with the temperature of the flue gas. This information is important for the following reasons.

  • The first priority is to assure your safety by making sure carbon monoxide levels aren’t excessively high. Levels that are outside of the manufacturer guidelines can be dangerous.
  • It helps us uncover hidden problems that are impossible to diagnose without a combustion analyzer.
  • It allows us to accurately measure the efficiency of your furnace. Are you truly getting 90+% efficiency out of your furnace? The only way to know is to measure.
  • It allows us to correct issues related to over firing and under firing. Both cause poor performance and shortened lifespan of your equipment.

Why is testing draft important?

Draft is required to remove the flue gasses from the heat exchanger on all atmospheric and draft induced appliances. Verifying draft and checking for spillage is an important safety consideration. All Althoff technicians are equipped with draft gauges that specifically measure draft pressure inside the flue. If improper draft is found, the cause should be remedied to protect the homeowners from carbon monoxide but also proper operation of the equipment.

The Althoff Difference

Our licensed HVAC technicians arrive at your home within a convenient 2-hour window (we always call when we're on the way). We'll park our clearly marked service truck in the street in clear view of the house, not in your driveway. We'll be easy to recognize in our clean uniform and name badge as we greet you with a business card and a smile. Our technicians never enter your home before asking permission and putting on their shoe covers. They carry “red carpets” and drop cloths to set their tool bags on and protect your property.

In short, we respect your time and your home. We do everything we can to make your service call convenient and comfortable.


"Matt knows our systems and definitely knows what he is doing. We have total confidence when he leaves that everything is done correctly."

~ T.S from North Barrington, IL


"Althoff's is a very good company who always gives great service and timely service by well-trained technicians. We are delighted to do business with this company!!"

~ R.G. from Crystal Lake, IL


"The tech was on time, efficient, and extremely knowledgeable. I would definintly use this individual again, if or when I need this kind of help."

~ M.S. from Crystal Lake, IL


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