Furnace Tune-up Cost

• Simple maintenance tasks (such as replacing filters or cleaning vents) can be a do-it-yourself project for $10 -$30 in materials. For example, pleated-material filters typically cost $4 -$30 each, depending on size and thickness and whether they are sold in packs of one, two, six or 12.
• A professional furnace tune-up can cost $70 -$200 or more but typically is about $100 -$125, depending on location and the type of furnace. For example, Horizon Services in Delaware and Pennsylvania offers an $89 online special, while Seider Heating & Air Conditioning in Wisconsin charges $110 for a gas furnace or gas boiler and $180 for an oil furnace. (If simple parts like a nozzle or thermo coupler need replacing, it can add $50 -$150 or more to the total.)

• Do-it-yourself maintenance can include checking the thermostat to be sure it's working correctly; checking and replacing the filter; cleaning exposed surfaces; and oiling the motor and other moving parts (newer ones may be self-lubricating). The Family Handyman Magazine gives furnace maintenance instructions, estimating the project is moderately difficult and takes less than three hours for a natural gas or propane furnace. Family Handyman suggests a professional tune-up should be done at least every three years, and warns that oil furnace combustion chambers should only be maintained by professionals.
• A professional furnace tune-up should include checking and cleaning all the major parts of the furnace; adjusting the pilot and burner if needed; inspecting and replacing filters if needed; lubricating all motors (although newer models may be self-lubricating); and performing a combustion efficiency test. DIYNetwork.com illustrates the typical steps included in a professional furnace tune-up.
• The commonwealth of Massachusetts lists what should be included in an annual fuel oil burner cleanout. A complete professional tune-up of an oil-fired furnace typically takes one to two hours, according to the National Oilheat Research Alliance.

• Some companies use tune-ups to spot needed (and sometimes unnecessary) repairs; make sure that any additional work will not be performed automatically only if the homeowner approves. Routine furnace repairs might cost $100 -$600 but average about $300 -$400. However, complex furnace repairs can cost $1,000 -$2,500 or more, depending on the type of problem and the parts needed.

• Since tune-ups can improve efficiency, some utility companies offer a furnace tune-up rebate of $20 -$50. For example, City Utilities in Missouri offers a $30 rebate for a furnace tune-up; and DTE Energy in Michigan offers a $50 rebate for a diagnostic tune-up on a forced air furnace or boiler, but the work must meet specific standards and be done by a participating contractor (DTE Energy provides a list).

• Many companies provide a written checklist of the work being done. Ask about training, and whether the technicians are certified by the National Oilheat Research Association or North American Technician Excellence Inc.
• ThisOldHouse.com provides tips for selecting a furnace maintenance company. Referrals are available through North American Technician Excellence Inc and the Air Conditioning Contractors of America.
• Check that the company is properly bonded, insured and licensed. Check for complaints with the Better Business Bureau.

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