A furnace is one of the most important appliances in a home, yet it can often be the least cared-for. Thankfully, there are some easy fixes that most homeowners can perform themselves, such as changing the air filter. However, there are other problems that require professional assistance. It’s important to choose a repair company with experience in handling furnaces of all types. Some companies that specialize in HVAC (heating, ventilation and air conditioning) services also handle ductwork, plumbing repair and other home repairs. This can save homeowners time and money by using one service provider for multiple projects.

It’s a good idea to get referrals from friends and neighbors, as well as local vendors, to determine the best Furnace Repair companies to work with. Moreover, it’s wise to interview potential technicians for their past experiences and expertise. You should also make sure the company you hire is licensed, bonded and insured.

Some people are tempted to try to fix their own furnaces, but there are certain issues that should always be handled by a professional, such as an extinguished pilot light or a clogged blower. For example, a clogged filter can restrict the flow of hot air and strain the blower motor, while a dirty pilot can lead to a false reading by the flame sensor and prevent the system from starting.

Another common problem involves the blower motor making loud scraping noises, which is usually a sign that the bearings are wearing out and need to be replaced. In some cases, a noisy blower motor can cause the blower to overheat, which can cause the gas valve to shut off. A heating expert can replace the blower motor bearings and restore the proper function of the furnace.

When a furnace isn’t functioning properly, it can cost homeowners a lot of money. If you’re noticing that your energy bill is going up by a few hundred dollars each month, that’s a good reason to call a heating repair company for an inspection.

Many older furnaces are prone to developing cracks in the heat exchanger. This can allow carbon monoxide to leak into the home, which is very dangerous to family members’ health. Symptoms of carbon monoxide exposure can include headache, burning sensation in the nose and eyes, nausea, disorientation, and flu-like symptoms. If you notice any of these signs, call a technician immediately to inspect and possibly replace the furnace.

If a furnace is frequently tripping the circuit breaker, that’s usually a sign that it’s overheating and that the high-limit switch needs to be reset (Photo 1). It’s a good idea to consult a service manual to locate the igniter and flame sensor rod in order to access the sealed combustion chamber.

To reset the switch, you’ll need to remove the retaining screws and pull out the screwdriver to expose the breaker. Then, consult the wiring diagram to identify the wire colors and follow the procedure in the service manual for reinstalling the switch.