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Furnace Service and Maintenance

Your furnace is one of those “out of sight, out of mind” items that sits tucked away in a furnace closet, basement or attic, and magically supplies comfort during the heating season. Every winter it delivers that warm, soothing wave of heat from the registers on cold, blustery days. Until one day, maybe it doesn’t... and suddenly you and your family are uncomfortable and inconvenienced. While gas furnaces are developed and tested to run reliably for years, routine furnace service and regular maintenance are the keys to keeping your heating system running at its highest efficiency and improving its life expectancy. Ignoring routine furnace maintenance can cause higher utility bills and reduced comfort, and make the furnace components work harder, leading to reduced life expectancy, and in some cases, a total shutdown or system failure.

While most average homeowners can handle simple air filter cleaning or replacing, calling a local, qualified HVAC system professional for regular furnace service and equipment checks can help ensure reliability and longevity, and in some cases prevent larger issues from developing. Either way, if you want to keep your furnace heating for years to come, don’t forget to keep it serviced and maintained regularly.

DIY Furnace Maintenance

All heating systems have some level of air filtration. From the most basic, 1-inch filter in the blower cabinet, to the larger, 4-inch media filter often in its own cabinet outside the furnace, to the more sophisticated electronic air cleaners and air purifiers, all require some basic maintenance. These filters help with indoor air quality by trapping airborne pollutants flowing through your system. They can also keep your system performing well by helping reduce the buildup of dust, dirt and other particles from accumulating on internal components like the blower motor, burners and heat exchanger.

When filters aren’t replaced or cleaned regularly, they can become clogged with debris that can restrict airflow, potentially affecting your comfort and your system’s efficiency. Dirty filters can cause extra wear and tear on furnace components and in more extreme cases cause the system to shut down completely. By comparison, checking and replacing a furnace filter can usually be done in just a few minutes, often with no tools required. As a precaution, before cleaning your furnace filter, be sure to turn off the furnace either at the thermostat or using the power switch, typically mounted on the side of the furnace.

In addition, it’s highly recommended to have a regularly scheduled furnace tune-up performed by a qualified HVAC professional. Your local dealer will open up the furnace and do a more extensive cleaning of vital components, check furnace heating temperatures, and look for other signs of potential issues that could lead to trouble down the road.

Why is Heater Service Important?

During normal furnace operation, dust, dirt, moisture from humidity or condensation, and microbial growths can build up on internal components. Airborne elements from normal household items and surfaces can lead to formicary corrosion within your HVAC equipment. Left unchecked, these issues can lead to loss of efficiency and worse, breakdown of component materials and a shorter furnace lifespan. Over time, important components like the heat exchanger, burners or blower housing can begin corroding, leading to reduced performance.

A regular furnace tune up can go a long way towards minimizing many of the issues caused by build-up of dirt and debris, and the inspections allow your contractor to monitor longer-term issues and take proactive steps to help prevent premature failure or inconvenient breakdowns during the heating season. Annual furnace service may also be a requirement to keep your furnace warranty valid as well. Many manufacturers state on warranty documentation that installation and maintenance by a licensed HVAC service provider are a part of the warranty conditions. When you have a ten-year parts limited warranty as is standard on Carrier® furnaces, you’ll want to be sure you keep that coverage valid for the full ten years.*

What to Expect during a Furnace Service

During a routine maintenance service call, your local dealer will likely evaluate furnace performance in various modes of operation, then shut off the gas and electrical power to execute a number of cleaning and inspection tasks. Furnace maintenance services will vary from contractor to contractor, but most HVAC dealers will perform similar tasks as part of a standard “clean and check” appointment, including:

  1. Check and potentially replace or clean the filter
  2. Check thermostat operation
  3. Run the furnace in heating mode and take temperature readings from both the return air ducts and the supply or heating ducts to be sure the heating output is within manufacturer’s specifications
  4. In the combustion chamber, check and clean the burner, crossover and igniter
  5. Check and adjust the gas valve
  6. On older furnaces, evaluate, clean and tune the pilot light system
  7. Clean the heat exchanger and check for cracks, holes or leaks
  8. Inspect and clean the blower and blower motor (your technician might need to remove the blower)
  9. Check for burned wires or high temperature problems
  10. Inspect the flue pipe and duct work
  11. Check for leaks in the gas line and other fuel supply components

When the service is complete, many contractors will provide a written summary of the inspections and tests completed along with results and recommendations.

How Much Should I Expect to Pay for a Furnace Tune Up?

Pricing for furnace service and maintenance will vary widely from dealer to dealer, for a number of reasons. Some dealers will be provide a more in-depth service with stated performance guarantees, while others might do a more basic service at a special rate to generate new business. Both approaches can yield the desired result of keeping your furnace heating system performing well as long as the service is provided by a reputable HVAC contractor. A Carrier® furnace dealer can quickly and easily give you a quote for heater service and get you scheduled for your annual maintenance.

Repair or Replace

A regular furnace tune up can maximize efficiency and provide longer lasting home heating. However, there are times when a simple maintenance call can identify an issue that will require a significant investment to remedy. Then, it’s decision time. Do you make the expensive repair and enjoy continued comfort from your current heating system? Or, do you make an even bigger financial commitment to replacing the furnace? The decision to repair or replace is up to you, and often it’s a matter of comparing the cost to repair, taking into account the age of the equipment, versus the cost of a new furnace that likely offers higher energy efficiency and comes with warranty coverage.

There is no easy answer, but many use the rule of thumb that if a repair adds up to around 50% of the cost of a new furnace, replacing is probably a better solution. If the current system has not incurred other major repairs, is in otherwise excellent condition, and issues that led to the breakdown can be identified and remedied, repairing the unit can make a lot of sense as well.

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