Whether it’s a leaky furnace or if you throw the switch to power up your heating system in the fall and it won’t start, common furnace problems can strike your home at any moment.
Regardless of the problem, knowing how your heating system works and a little bit about some frequent furnace problems is crucial in deciding whether you can troubleshoot on your own or if you need professional assistance. By observing the furnace's behavior, listening for strange noises and checking for signs of damage or blockage, you can narrow down the possible causes.
If you're not sure about the problem or don't have the necessary skills and tools, it's best to call a reputable HVAC company like GV Heating & Air. We can accurately diagnose the issue and complete the required repairs or maintenance, so we can get your furnace up and running ASAP.
Here's more about what causes a furnace to leak water and eight other common heating dilemmas:
1. The Furnace Is Leaking
A furnace can leak water for a number of reasons. One possibility is a condensate leak, where the water produced during the combustion process is not effectively draining away. This may be due to a plugged condensate drain line or a malfunctioning condensate pump. Another potential cause of water leakage from a furnace is a cracked heat exchanger, which can be responsible for water—as well as dangerous gases—escaping from the furnace.
It is necessary to deal with water leaks immediately to prevent further damage to your furnace. Reaching out to a professional HVAC technician like the crew at GV Heating & Air is recommended to diagnose and resolve the issue effectively.
2. My Furnace Blows Cold Air/Lack of Heat
Some possible causes for a furnace blowing cold air or not blowing hot air include a malfunctioning thermostat, a problem with the pilot light or ignition system, a plugged air filter, or a malfunctioning heating element. It is also possible your furnace is overheating and shutting off as a safety precaution.
If your furnace won’t blow hot air, it's a good idea to contact a professional HVAC specialist to diagnose and fix the problem. They can offer an accurate assessment and recommend the correct solution.
3. My Furnace Is Not Keeping Up
A frequent reason your furnace isn’t keeping up on a cold day is that your home is lacking insulation, which can result in heat loss and decreased efficiency. Another reason your furnace is falling short is because it’s too small for your home, so it can’t produce enough heat to adequately warm the space. A broken thermostat or ductwork problems can also cause insufficient heating.
To address this, first look at your home’s insulation level and make sure it’s enough to insulate your home. Also, look at the thermostat to see if it’s set right and the batteries aren’t dead.
If the problem won’t go away, consider contacting an experienced HVAC company, such as GV Heating & Air, who can look over your system, determine the root cause and provide solutions such as furnace replacement, repairing ductwork or changing your thermostat settings.
4. My Furnace Is Not Working
If your furnace is not working, there are a few steps you can take to troubleshoot before contacting a professional. Check if the thermostat is set correctly and the batteries are good. If the furnace still doesn't turn on, check the circuit breaker or fuse box to verify power is reaching the unit.
If there is power but your furnace won't blow hot air, the problem may rest with the ignition system or gas supply. In that case, it's best to reach out to an experienced HVAC professional for diagnosis and repair.
5. My Furnace Turns On and Off
If your furnace is short cycling, that means it is turning on and off often at short intervals as opposed to running in regular cycles like it should. This can result in inefficiency, more energy use and potential damage to your heating system.
If you suspect your furnace is short cycling, the first step is to look at your unit’s air filter. Filters should be exchanged on a regular basis to ensure air flow, so if your furnace air filter is dirty you should exchange it for a clean one—and make sure it is pointing in the right direction. If that doesn’t do the trick, go to your thermostat and make sure it’s set right and the batteries are good.
If those two things don’t work, it’s smart to call experts like the crew at GV Heating & Air. Prompt professional attention will help restore the proper functioning of your furnace and prevent further complications and high energy bills.
6. My Furnace Is Making a Humming Noise
If your furnace is making a humming noise, it often is a symptom of an issue with the electrical components or the blower motor. Because of this, if you hear your furnace making a humming noise, it is critical to take action.
If the noise doesn't go away, it is better that you get in touch with a professional HVAC technician.
7. My Furnace Is Noisy
If your furnace is emitting a consistent loud noise, it's important to deal with the issue promptly to prevent further damage or potential safety hazards. One common problem that causes this is a broken blower motor or fan, which can make a grinding or screeching sound. Another potential cause is a loose or worn-out belt that may emit a squealing or rattling noise.
Because of the complexity of furnace systems and potential risks involved, it's best to contact a heating and cooling specialist.
8. My Furnace Won't Start
If your furnace refuses to turn on, make sure the thermostat is set to the right temperature, is in heating mode and the batteries are working. Then, check if the circuit breaker or fuse that goes to the furnace is sending power to the unit. If these basic checks don't fix the problem, you can inspect the furnace's power switch or emergency shutoff switch to make sure they're in the "on" position and weren’t accidentally turned off.
If those steps don’t get the job done, phone an expert for furnace repair.
9. My Furnace Is on but Not Igniting
Much like a furnace that will not on at all, a furnace that isn’t igniting can be caused by a dirty air filter or a tripped circuit breaker. So, examining the air filter and taking a peek at your circuit breakers are a good place to start.
Other common causes of a furnace not igniting are a faulty igniter or faulty flame sensor. Indications of these include the furnace continuously trying to ignite without success, no heat production or the furnace is making a burning or gas smell. Both of these issues can be easily addressed by HVAC professionals like the team at GV Heating & Air.
