Whether it’s a leaky furnace or if you throw the switch to turn on your heating system when the weather gets cold and it won’t start, common furnace problems can impact 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 vital in deciding whether you can troubleshoot on your own or if you need professional assistance. By monitoring the furnace's behavior, listening for peculiar noises and checking for signs of damage or blockage, you can narrow down the possible causes.
If you're unsure about the problem or aren't equipped with the necessary skills and tools, it's best to call an experienced HVAC company like Dial One Mears Air Conditioning & Heating Inc. 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 prevalent heating issues:
1. My Furnace Is Leaking Water
A furnace can leak water for many reasons. One possibility is a condensate leak, where the water released during the combustion process is not completely draining away. This could be due to a plugged 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—leaking out of the furnace.
It is imperative to address water leaks immediately to prevent additional damage to your furnace. Reaching out to a professional HVAC technician like the crew at Dial One Mears Air Conditioning & Heating Inc is recommended to diagnose and resolve the issue properly.
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 is also possible your furnace is overheating and shutting off as a safety mechanism.
If your furnace will not blow hot air, it's a good idea to contact a trained HVAC technician to diagnose and fix the problem. They can give an accurate assessment and advise you on the appropriate 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 lacks insulation, which can cause heat loss and lower efficiency. Another reason your furnace is falling short is because it’s too small for your home, so it can’t make enough heat to completely warm the space. A malfunctioning thermostat or ductwork problems can also result in insufficient heating.
To handle this, first assess your home’s insulation level and make sure it’s enough to protect your home. Also, check the thermostat to make sure it’s set right and the batteries still function.
If the problem continues, consider contacting an experienced HVAC company, such as Dial One Mears Air Conditioning & Heating Inc, who can inspect 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 calling a heating specialist. Check if the thermostat is set properly and the batteries are good. If the furnace still doesn't turn on, check the circuit breaker or fuse box to make sure power is reaching the furnace.
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 consult a seasoned HVAC technician for diagnosis and repair.
5. My Furnace Is Short Cycling
If your furnace is short cycling, it means it is turning on and off frequently at short intervals instead of running in regular cycles like it is designed to do. This can lead to inefficiency, more energy use and potential damage to your unit.
If you think your furnace is short cycling, the first step is to look at your unit’s air filter. Filters should be changed on a regular basis to ensure air flow, so if your furnace air filter is plugged with dirt 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, check 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 Dial One Mears Air Conditioning & Heating Inc. Prompt professional attention will help restore the proper functioning of your furnace and avoid additional complications and high energy bills.
6. My Furnace Is Making a Humming Noise
Whenever your furnace is making a humming noise, it often is an indication of an issue with the electrical components or the blower motor. For this reason, if you notice your furnace making a humming noise, it is important to take action.
If the noise doesn't go away, it is best to get in touch with a professional HVAC technician.
7. My Furnace Is Making a Loud Noise
If your furnace is making a constant loud noise, it's important to address the issue promptly to prevent further damage or potential safety risks. One common cause of this is a failing blower motor or fan, which can generate a grinding or screeching sound. Another possible cause is a loose or worn-out belt that may produce a squealing or rattling noise.
Due to the complexity of furnace systems and potential risks involved, it's better to consult with a heating and cooling specialist.
8. My Furnace Is Not Turning On
If your furnace won't turn on, make sure the thermostat is set to the preferred temperature, is in heating mode and the batteries are functioning. Then, see if the circuit breaker or fuse that goes to the furnace is working right. If these basic checks don't address the problem, you can inspect 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 work, phone an expert for furnace repair.
9. My Furnace Is Not Igniting
Like a a furnace not turning on at all, a furnace that isn’t igniting can be the result of a plugged 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 likely causes of a furnace not igniting could be a faulty igniter or faulty flame sensor. Indications of these include the furnace continuously attempting to ignite without success, an absence of heat production or the furnace is making a burning or gas smell. Both of these issues can be simply repaired by HVAC specialists like the team at Dial One Mears Air Conditioning & Heating Inc.