Furnaces use natural gas to heat homes, so working on them requires specialized knowledge and skills. A botched DIY repair job can lead to toxic gas leaks or fires.

Before starting, make sure to turn off the power switch and check if your circuit breaker or fuse has tripped. Also, make sure the vents are open and unblocked. Contact CINCINNATI FURNACE REPAIR for professional help.
The thermostat is a critical part of the furnace that monitors and controls your heating system. If this piece of equipment breaks down or malfunctions, it will result in poor heating performance throughout your home. Some basic repairs can be done at home, while others will require professional assistance to ensure your furnace is functioning properly.
If your thermostat is not working, first check to make sure it’s set correctly and that the batteries are charged. If these are not the cause, you should check your breaker box to see if a fuse has blown or the circuit breaker has tripped. These issues can prevent your furnace from turning on and should be fixed immediately to avoid a loss of heat for your home.
Another common issue with the thermostat is that it could have a clogged pilot orifice. If this is the case, you can usually clear the clog with a needle and consult your owner’s manual for specific instructions on how to do so. You can also try to adjust the flame setting to see if this helps. If the flame is too small or too large, this may be a sign that your gas valve is faulty and will need to be replaced by a technician.
Your blower motor and fan need to be free of dust, dirt, and debris to operate effectively. The technician will clean these components and lubricate any moving parts that need it to reduce friction and prevent wear and tear. They will also clean the burners, inspect and test safety controls, and clean the flue pipe.
Many furnace problems can be avoided with annual maintenance and regular tune-ups. A professional can help you determine the best maintenance options for your furnace based on its age, the size of your home, and the type of heating system you have. By catching and fixing minor issues before they become major problems, you can extend the life of your furnace.
Burners
A furnace burner uses a mixture of gas and air to ignite a combustible flame. The resulting heat then heats metal surfaces in sealed combustion chambers known as the “heat exchanger.” This process is designed to maximize the transfer of heat energy to your home’s living space while minimizing harmful emissions.
A faulty burner can cause incomplete combustion that wastes fuel and creates unsafe fumes. When this happens, the gas valve closes and your furnace shuts off. An HVAC professional can fix this issue by cleaning or replacing the burner.
Most modern gas furnaces use surface ignition or an intermittent pilot light to ignite the fuel/air mix. These systems are designed to last the furnace’s lifetime, but they can experience a variety of issues that require repair. These issues may include a defective igniter or a broken heat exchanger. Often, these issues are easy to identify with a quick inspection, but they can be complicated to fix.
Modern high-efficiency natural gas furnaces offer improved energy use and lower heating costs. However, they can be difficult to repair due to their complex designs and electronic components. This means that repairs can take 1-2 hours just to diagnose the problem, and additional time is needed for a full repair or replacement of the burner, ignition system, or heat exchanger.
Many older furnaces still use a standing pilot light that burns continuously, even when the system is turned off. Using a standing pilot light is expensive, inefficient, and dangerous. HVAC professionals can replace this old, inefficient system with a newer, safer intermittent pilot light that only activates when the system is on.
Most issues that occur during a furnace repair begin with a clogged or dirty air filter. This is an easy fix that can be completed at home, but the longer you leave it unattended, the worse the damage will become. In some cases, the air filter may need to be replaced with a new one. Other issues can be prevented with routine maintenance performed by a certified HVAC technician. This includes replacing the air filter, cleaning the furnace vents, and completing annual inspections.
Air Filter
The air filter of a furnace, which also functions to regulate the temperature of incoming air, is an important component that should be regularly replaced. If it becomes dirty or clogged, the system must work harder to distribute warm air throughout the house, thus increasing energy usage and causing the total price of your heating bills to rise. In addition, if the air filter has evidence of microbial growth or mold on it, these particles will circulate throughout the home and can cause respiratory issues for everyone in the family.
Changing your furnace air filter is an easy DIY repair that can be completed by simply taking out the old one and installing a new, clean filter in its place. It is important to use the correct size of filter for your particular system. Also, make sure you don’t install the filter backwards – check your owner’s manual to ensure it is properly installed.
If you suspect your system is having problems, first take a look at the fuse or breaker box to see if any of them have been blown or tripped. This is troubleshooting, not fixing, so don’t attempt any repairs by opening the furnace cabinet with tools.
It is best to have a professional inspect your unit to ensure all components are in good working condition, and that your ductwork is not leaky. It is also a good idea to test the flame sensor to ensure it isn’t coated in residue or clogged. Lastly, it is important to have your professional conduct a blower motor test and ensure the fan blades are clear of debris, lubricated and in proper working order.
Furnaces are essential to keeping your home cozy and comfortable. However, when a malfunction occurs, it can quickly turn your winter nights into unwelcome cold ones. By paying attention to warning signs, such as a dirty air filter or malfunctioning thermostat, you can avoid the need for major repairs and keep your home comfortable all winter long. By committing to routine maintenance, you can save money and extend the life of your furnace.
Motor
The motor is what powers the fan that blows heated air through your ductwork and into your home. It is important to maintain this motor for proper airflow and efficient operation. If the motor begins to deteriorate or develop electrical issues, you may notice poor airflow through vents or your circuit breaker will keep tripping. This is a problem that requires professional repair.
If you are experiencing a loss of power, it’s time to call in a technician for an inspection. The problem could be as simple as a tripped circuit breaker or as complex as a cracked heat exchanger. In either case, it’s best to let the professionals handle this one so that you don’t accidentally try and fix the issue yourself which could result in further damage to your system and potential safety hazards for you and your family.
Major furnace repairs are costly and require a great deal of time, manual labor and skill. These repairs address issues that severely limit or completely inhibit your furnace’s performance. This is a point where it’s worth considering whether or not it would be more cost-effective to replace your system entirely. A good rule of thumb is to compare your repair costs with the price of a new furnace that has improved energy efficiency.
Preventing many furnace problems is a matter of completing regular maintenance such as cleaning or replacing the air filter and vacuuming the interior of the unit and ductwork each year during heavy usage times. In addition, examining your gas line and drip leg for leaks is a smart way to prevent carbon monoxide poisoning. For gas furnaces, this includes inspecting the heat exchanger for cracks. If you smell gas, exit your home immediately and contact emergency services. It’s also a great idea to test your emergency shutoff switch every year. A properly working switch will shut off your gas and water valves, preventing an explosion in the event of an emergency. If the switch isn’t working, it should be replaced right away. The cost of this repair is typically less expensive than the replacement cost of a damaged heat exchanger or other more complicated parts.