Whether it’s a leaky furnace or if you flick the switch to power up your heating system in the fall and it won’t start, common furnace problems can affect your home at any moment.
Regardless of the issue, understanding 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 support. By noting 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 uncertain about the problem or don't have the necessary skills and tools, it's best to call an experienced HVAC company like A2Z Air Inc. We can accurately diagnose the issue and complete the required repairs or maintenance, so we can get your furnace working again ASAP.
Here's more about what causes a furnace to leak water and eight other common heating dilemmas:
1. My Furnace Is Leaking Water
A furnace can leak water for many reasons. One possibility is a condensate leak, where the water created during the combustion process is not completely draining away. This may be due to a blocked condensate drain line or a broken 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 imperative to correct water leaks quickly to prevent additional damage to your furnace. Contacting a professional HVAC technician like the crew at A2Z Air Inc is recommended to diagnose and resolve the issue successfully.
2. My Furnace Is Blowing Cold Air/Not Blowing Hot Air
Some potential causes for a furnace blowing cold air or not blowing hot air are a malfunctioning thermostat, a problem with the pilot light or ignition system, a blocked air filter, or a malfunctioning heating element. It could also be 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 skilled HVAC technician to diagnose and fix the problem. They can offer an accurate assessment and suggest the proper solution.
3. My Furnace Is Not Keeping Up
A widespread 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 reduced efficiency. Another reason your furnace is struggling is because it’s not big enough for your home, so it can’t make enough heat to completely warm the space. A malfunctioning thermostat or ductwork problems can also produce inconsistent heating.
To deal with this, first check your home’s insulation level and make sure it’s enough to protect your home. Also, look at the thermostat to ensure it’s set right and the batteries still function.
If the problem won’t go away, consider contacting an experienced HVAC company, such as A2Z Air Inc, who can look over your system, determine the root cause and provide solutions such as furnace replacement, repairing ductwork or adjusting 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 phoning a pro. Check if the thermostat is set correctly and the batteries are good. If the furnace still doesn't start, check the circuit breaker or fuse box to make sure power is reaching the system.
If there is power but your furnace won't blow hot air, the problem may be with the ignition system or gas supply. In that case, it's best to reach out to a knowledgeable HVAC technician for diagnosis and repair.
5. My Furnace Is Short Cycling
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 is designed to do. This can lead to inefficiency, more energy use and potential damage to your heating system.
If you think your furnace is short cycling, the first step is to check your unit’s air filter. Filters should be changed when they are dirty to ensure air flow, so if your furnace air filter is dirty you should exchange it for a clean one—and be sure it is pointing in the right direction. Second, check your thermostat and verify it’s set right and the batteries are good.
If those two things don’t work, it’s best to call experts like the crew at A2Z Air Inc. Quick professional attention will help restore the proper functioning of your furnace and prevent additional complications and high energy bills.
6. My Furnace Is Making a Humming Noise
When your furnace is making a humming noise, it often is a sign of an issue with the electrical hardware or the blower motor. Because of this, if you detect your furnace making a humming noise, it is crucial to take action.
If the noise persists, it is a good idea to contact a professional HVAC technician.
7. My Furnace Is Making a Loud Noise
If your furnace is making a consistent loud noise, it's important to address the issue promptly to prevent further damage or potential safety concerns. One common cause of this is a failing 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.
Due to the complexity of furnace systems and potential risks involved, it's better to contact a heating and cooling specialist.
8. My Furnace Is Not Turning On
If your furnace will not turn on, make sure the thermostat is set to the preferred temperature, is in heating mode and the batteries are functioning. Then, verify that the circuit breaker or fuse that controls the furnace is functioning properly. If these basic checks don't take care of the problem, you can examine the furnace's power switch or emergency shutoff switch to ensure they're in the "on" position and weren’t accidentally turned off.
If those steps don’t get the job done, phone a professional for furnace repair.
9. My Furnace Is Not Igniting
Similar to a furnace that won't turn on at all, a furnace that isn’t igniting can be caused by a dirty air filter or a tripped circuit breaker. So, checking out the air filter and looking over your circuit breakers are a good place to start.
Other potential causes of a furnace not igniting are a faulty igniter or faulty flame sensor. Indications of these include the furnace continually making an attempt to ignite without success, no heat production or the furnace is making a burning or gas smell. Both of these issues can be easily solved by HVAC pros like the team at A2Z Air Inc.