Solved: Furnace Is Leaking Water and 8 Other Heating Problems

Whether it’s a leaky furnace or if you flick the switch to turn on your heating system when it gets chilly and it won’t start, common furnace problems can affect your home at any moment. Regardless of the issue, knowing 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 support. By noting 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 uncertain about the problem or don’t have the necessary skills and tools, it’s best to call an experienced HVAC company like Fire & Ice HVAC. We can accurately pinpoint the issue and execute 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 frequent heating problems:

1. The Furnace Is Leaking

A furnace can leak water for a number of reasons. One possibility is a condensate leak, where the water created during the combustion process is not properly draining away. This might be due to a blocked condensate drain line or a failing condensate pump. Another potential cause of water leakage from a furnace is a cracked heat exchanger, which can lead to water—as well as dangerous gases—coming out of the furnace. It is necessary to address water leaks promptly to prevent more damage to your furnace. Consulting with a professional HVAC technician like the crew at Fire & Ice HVAC is recommended to diagnose and resolve the issue properly.

2. My Furnace Makes 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 clogged air filter, or a malfunctioning heating element. It also may be your furnace is overheating and shutting off as a safety precaution. If your furnace will not blow hot air, it’s best 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 Can’t Keep Up

A widespread reason your furnace isn’t keeping up on a cold day is that your home lacks insulation, which can result in heat loss and decreased efficiency. Another reason your furnace is struggling is because it’s not powerful enough 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 keep warm air in and cold air out of your home. Also, check the thermostat to ensure it’s set right and the batteries aren’t dead. If the problem lingers, consider consulting with an experienced HVAC company, such as Fire & Ice HVAC, who can assess your system, determine the root cause and provide solutions such as furnace replacement, repairing ductwork or modifying your thermostat settings.

4. My Furnace Won’t Work

If your furnace is not working, there are a few steps you can take to troubleshoot before phoning a pro. Make sure the thermostat is set correctly and the batteries are fresh. If the furnace still doesn’t start, check the circuit breaker or fuse box to make sure power is reaching the unit. If there is power but your furnace won’t ignite, the problem may be with the ignition system or gas supply. In that case, it’s better to contact a seasoned 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 frequently at short intervals instead of running in regular cycles like it is designed to do. This can cause inefficiency, higher energy bills and potential damage to your heating system. If you believe your furnace is short cycling, the first step is to check your unit’s air filter. Filters should be exchanged when they are dirty to ensure air flow, so if your furnace air filter is clogged with debris you should exchange it for a clean one—and be sure it is pointing in the right direction. If that doesn’t do the trick, 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 Fire & Ice HVAC. Prompt professional attention will help restore the proper functioning of your furnace and reduce the chance of additional complications and high energy bills.

6. My Furnace Hums All the Time

When your furnace is making a humming noise, it often is an indication of problems with the electrical hardware or the blower motor. Because of this, if you hear your furnace making a humming noise, it is important to take action. If the noise persists, it is best to  get in touch with a professional HVAC technician.

7. My Furnace Is Making a Loud Noise

If your furnace is emitting a persistent loud noise, it’s important to handle the issue right away to prevent further damage or potential safety concerns.  One common problem that causes this is a malfunctioning blower motor or fan, which can make a grinding or screeching sound. Another common cause is a loose or worn-out belt that may make 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 Can’t Turn On

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 good. Then, check if the circuit breaker or fuse that controls the furnace is sending power to the unit. If these basic checks don’t resolve the problem, you can examine 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 work, call an expert for furnace repair.

9. My Furnace Is on but Not Igniting

Similar to a furnace that won’t turn on at all, a furnace that isn’t igniting can be the result of 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 include a faulty igniter or nonfunctional flame sensor. Symptoms of these include the furnace repeatedly 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 easily fixed by HVAC specialists like the team at Fire & Ice HVAC.