Furnaces Heating

Why Is My Furnace Running Constantly?

Why is my furnace running constantly? Many people ask this question while wondering how long a furnace should run before shutting off. What if your furnace keeps running when the thermostat is off?

Gas furnaces that run constantly are annoying to listen to, wear down the system, and increase your monthly energy bill. Luckily, the possible causes are easy to spot and don’t take long to fix. 

Here at Air Specialties, we’ve provided a list of reasons to help you answer the question of why the furnace is running constantly. We’re your CT heating specialists, with a team of certified technicians that can diagnose and repair any problem with your HVAC system.

What Is the Typical Furnace Run Time?

How long should a furnace run before shutting off? Typically, you can expect furnace cycles to run two to three times per hour. Each cycle runs for about 10-15 minutes. During freezing weather, this cycle may increase slightly.

Reasons My Furnace Is Running Constantly

Why is my furnace running constantly? There are several reasons why this may be happening. Here are some steps to follow to troubleshoot the cause of the issue:

1. Dirty Furnace Air Filter

A dirty furnace filter is the most common reason why your furnace may constantly be running. Your HVAC system must pull air into the equipment to warm the air before it circulates back out through the vents. 

A dirty air filter can obstruct your furnace, causing it to work harder to meet your heating demands. However, it will continue to run until your home reaches the desired temperature. 

If your air filter is dirty, replace it with a new one. You should do this every 1-3 months.

2. Wrong Thermostat Setting

Why is my furnace running constantly? If your thermostat is set too high, it will keep running to get it to that temperature. You may notice your house is hot before becoming aware that the furnace keeps running. Check your thermostat to see the set temperature. 

It’s also possible that you have a malfunctioning thermostat. For example, if your thermostat runs after the temperature change, it may be faulty.

3. Blower Issues

When your furnace is turned on but not producing warm air, the cause is likely an issue with the blower. For example, the blower may have corroded wires, or the fuse may have blown. 

If your room temperature feels colder than usual, check your thermostat. Since this problem involves electrical components, contact a professional HVAC company to fix the issue. 

4. Faulty Limit Switch

The limit switch controls the heat in your furnace. When the thermostat sends a signal to the controller that it’s time to turn on the heat, the switch sends a signal to the furnace. 

If your furnace has a faulty limit switch, it may not receive the signal. This lapse can cause it to run more often than necessary. A faulty limit switch may also be why your furnace keeps running when the thermostat is off. You should call an HVAC technician to perform an inspection if you suspect this is the issue.

5. Malfunctioning Pilot Light

A pilot light ignites the gas before it reaches the burner. If it’s malfunctioning, the broken pilot light can cause your furnace to run constantly. The reason is that the system can’t reach the set temperature without a sufficient supply of gas to warm the air. 

If the pilot light is malfunctioning, you may need to call an HVAC professional to have it replaced. In addition, you can find the reset button on your furnace to try resetting the pilot light, which may solve the problem. If this doesn’t work, it may be an issue with the heat exchanger.

Schedule an Inspection or Repair With Our Service Experts

Why is my furnace running constantly? How long should a furnace run before shutting off? Does your furnace keep running when the thermostat is off? Air Specialties can inspect your furnace and repair any heating system problems. 

Air Specialties also provides furnace cleaning in CT to ensure your furnace runs efficiently for the winter. Contact us today!


Is Your Furnace Short Cycling? Here’s What to Do

There’s nothing like a cozy and comfortable home during the cold winter months. But keeping your home warm when the temperatures drop below freezing takes a toll on your furnace. It can even cause the system to become inefficient and develop mechanical issues if proper care and maintenance are not taken into account. 

A typical problem with your furnace is short cycling or overheating. Short cycling refers to the start-and-stop cycle that keeps the furnace from properly heating your home. 

So what causes short-cycling furnaces? Can it be remedied? Here are some things you should know about short-cycling heating systems.


It’s a complex question: “Why is my furnace short-cycling?” However, some common problems result in short cycling, such as an overheating system. If your furnace starts to overheat, it may shut off to prevent further damage. 

Overheating can also potentially create cracks in your heat exchanger, which could lead to dangerous carbon monoxide leaks in your home.

What to Do: Contact your local heating specialists to have them repair your unit according to its specific needs. When your furnace is working properly, you shouldn’t have to worry about overheating.

Thermostat Problem

If you have a short-cycling heater, turn next to your thermostat.

A broken or poorly placed thermostat is one of the leading causes of short cycling in furnaces. You may also want to rethink the location of your thermostat. Ideally, a thermostat that is placed too close to a heat source or in direct sunlight tends to warm up too quickly. This signals your furnace to shut off before your home is adequately warmed.

What to Do: Don’t place your thermostat directly over a heat register or near a drafty door or window. Test the unit regularly to ensure it is working optimally. Is your thermostat mounted in the wrong place? You can choose to either relocate the thermostat yourself or reach out to a professional for assistance.

Age-Related Problems

Maybe unsurprisingly, a short-cycling furnace can be linked to old age.

Your furnace’s efficiency tends to decline with age. An old and faulty furnace will short cycle more often and fail to warm your space adequately. Like all the other devices in your home, a furnace is subject to regular wear and tear, which becomes more pronounced with age.

What To Do: Wait until the furnace exhausts its usefulness due to advanced age before you act. Even if your old furnace has no significant mechanical issues, update it with a newer version that provides better performance and is more energy-efficient.

Dirty Air Filter

Dirty air filters restrict airflow and cause pressure to build up inside your system. The blocked air in the furnace, in turn, raises internal temperatures causing the unit to shut off automatically.

What to Do: Replace your air filters regularly, at least once each month, to prevent blockages and restricted airflow that leads to short cycling. You should also schedule frequent cleaning and maintenance to avoid clogged air filters.

Oversized Furnace

Have you checked the potential causes above but still find yourself asking, “Why is my furnace short-cycling?” If your furnace is short cycling with a new filter, an oversized furnace may be to blame. A heating system that’s too big for your home is one of the most common causes of short-cycling furnaces.

An oversized furnace that doesn’t match your home’s size may heat your small spaces quickly but unevenly. Such furnaces will short cycle rapidly with the rising temperatures in your home. Also, households with poor insulation may experience rapid short cycling. In this scenario, the furnace could be producing adequate heat, which is then lost through faulty seals, holes, and cracks.

What to Do: Install an appropriately sized furnace for the size of your home to avoid a short-cycling heater. You should also insulate your areas adequately to prevent energy loss.

Bad Flame Sensor

If you have a short-cycling furnace, you may be dealing with a malfunctioning or dirty flame sensor. When you have a bad flame sensor, your furnace flame will shut off right after lighting. If your furnace turns off after two to 30 seconds, this may be because your malfunctioning flame sensor cannot detect the heat created by the furnace. As a result, the gas valve closes and shuts off your furnace.

Although a malfunctioning flame sensor may shut off the gas at the wrong time, you shouldn’t feel too frustrated about this problem occurring. Flame sensors are safety devices that are simply trying to ensure that gas doesn’t enter your home and put your health at risk. If you’re experiencing this issue, rest assured that it’s nothing a professional HVAC technician can’t fix.

What to Do: You’ll need to either clean or replace your flame sensor with the help of a professional technician. A replacement will be needed if the sensor is broken or cracked.

Malfunctioning Blower Motor

While less common, a problem with the blower motor can cause a short-cycling furnace. The blower motor works by pushing air through your heating system and sending it out into your home. However, when the blower motor malfunctions, the warm air that’s generated will collect inside your furnace with no way of escaping — causing the furnace to turn off for safety reasons.

When it comes to a furnace blower motor, it’s important that the hot air flows out into your home. If the heat gets trapped inside the furnace, this can lead to overheating and cause damage to various critical parts. Although this problem can get in the way of your family’s comfort, it’s also important to recognize that a blower motor issue can lead to further repairs or a replacement if not handled promptly.

What to Do: Inspect your vents for proper airflow. If you notice a weak airflow — or none at all — this could mean that your blower motor is faulty. When you contact a professional HVAC technician for assistance, they’ll let you know if the blower motor needs to be replaced or if it can be repaired. Our heating experts specialize in everything from furnace replacements to boiler repair in CT, so you can trust us to provide you with a reliable solution.

Blocked Exhaust Flue

Have you checked all the possibilities above but still find yourself asking, “Why is my furnace short-cycling?” There’s one more crucial option worth considering: the exhaust flue is blocked.

Your furnace’s exhaust flue is responsible for venting the noxious gases that are created during the combustion process. This small but mighty component is incredibly important, as it helps prevent these gases from entering your home.

However, it’s important to know that this part isn’t immune to problems. There’s a chance that the flue can become clogged with debris, foreign objects, or an animal’s nest. If the flue detects a blockage, the component will tell the furnace to shut down completely.

What to Do: You can shut off the furnace and disconnect the flue to inspect it for a clog. From here, you might be able to extract the blockage yourself. If you suspect that an animal is in the flue or you don’t feel comfortable handling the job yourself, you should contact a professional for assistance.

Furnace Repair and Maintenance Services in New Haven, CT

Why is my furnace short-cycling? As you can see above, this question isn’t as easy as you might think. There are many possibilities; for example, your furnace could be too large for your home, or you could be experiencing a clogged flue. It might take some troubleshooting before you get to the root cause of the issue.

If you’ve checked your furnace for the problems above and are still dealing with short-cycling problems, don’t wait to contact a professional HVAC company for help.

If your furnace is experiencing unexplained short cycling, it means its efficiency is rapidly declining. The cumulative cost of repair may surpass a new unit’s price, and you should consider replacements over continuous maintenance. When you need a gas furnace service in CT because of a short-cycling heater, turn to your local heating and air conditioning company for assistance. We offer everything from heating system repairs to air conditioning replacement in New Haven to keep your home comfortable!
If you need help with your HVAC system, contact Air Specialties. We are a local company offering furnace repair and furnace maintenance in New Haven, CT. Get in touch with us today for more information about what we can do for you!

Air Conditioner

6 Reasons Why Your Air Conditioner Turns Off By Itself

Air conditioning problems can be incredibly frustrating, especially if temperatures are reaching record highs just outside your door. One common problem that can cause many homeowners to scratch their heads is when their AC unit turns off after about 15 minutes. One minute your air conditioner could be running fine, and the next, the unit has completely shut off. While this problem can be downright puzzling, it can also put your comfort at risk since your home never gets as cool as you would like it to.

So, why does your air conditioner turn off by itself? There can be several different reasons why this issue is happening. Let’s go over them in more detail below.

Faulty Thermostat

If your air conditioner keeps shutting off, you’ll want to first check the thermostat. Your thermostat may fail to properly sense the temperature inside your home. While this problem can be due to an electrical issue, you might want to replace your thermostat’s batteries to see if this simple fix makes a difference.

Try replacing the batteries, and if the problem persists, don’t hesitate to contact a professional for help. A technician will perform a repair, or they might suggest relocating the thermostat to a different part of the house. If your thermostat is currently in a shady place or near a cool air vent, the device might inaccurately believe that your entire home is cool and could shut off the AC unit as a result.

Dirty Air Filter

Why does your air conditioner turn off by itself? The issue could lie with the air filter. Believe it or not, keeping the filter in your HVAC system clean can make a significant difference when it comes to your comfort, electric bills, and air conditioner performance.

Short cycling is a common problem associated with dirty air filters. When the air filter becomes blocked with debris, this makes it difficult for air to pass to and from the air conditioner’s air handler. This poor airflow can cause the evaporator coils to freeze — and the AC unit can shut off as a result. Additional signs of frozen evaporator coils can include water leaks and a clogged condensate drain line.

Refrigerant Leaks

If your air conditioner keeps shutting off, you’ll also want to be on the lookout for any refrigerant leaks. As your air conditioner gets older, it can experience different types of wear and tear. Corrosion and weakening components could lead to these leaks.

Low refrigerant levels can cause many problems for air conditioning systems. For example, this problem often creates a sudden change in pressure that causes the outdoor compressor unit to shut down.

Damaged Compressor

Your air conditioner has two important components: the indoor unit and the outdoor unit. As we mentioned above, this outdoor system is known as a “compressor.” Like most other parts, this compressor can experience wear and tear over time — and that might be why your AC unit keeps shutting off.

So, why does your air conditioner turn off by itself when it has a damaged compressor? When it comes down to it, your air conditioner can’t do its job without a fully-functioning compressor. If this unit overheats, malfunctions, or fails completely, the entire cooling system will shut down as a result.

The problem could be caused by dirt and debris getting inside the unit, or it could potentially be due to regular old age. No matter the reason, it’s important to contact a professional technician to get to the bottom of the problem once and for all.

Malfunctioning Run Capacitor

If your air conditioner keeps shutting off after checking for the problems listed above, you could be dealing with a faulty run capacitor. What is a run capacitor? Think of it as the device that gives air conditioning units a sudden rush of energy when starting a new cooling cycle. The run capacitor is constantly storing energy, which it will provide to ensure that the air conditioner’s fan motor is running properly.

When you have a malfunctioning run capacitor on your hands, the air conditioner won’t receive the continuous supply of energy it needs to keep on running. In the end, this could be why your air conditioner starts then stops after only a few seconds.

Oversized AC

When your air conditioner keeps shutting off, you should check to make sure that your cooling system isn’t too large for your house. Although you might think installing an oversized air conditioner will benefit you and your family in the long run, it won’t actually improve your comfort. Instead, you might experience the exact opposite.

If your AC is too big, it’ll finish cooling your home much quicker than if you’d installed a smaller unit. While this may seem like a perk, the air conditioner will end up shutting down much quicker as a result. As you can probably imagine, you could end up experiencing hot and cold spots throughout your home, as well as higher energy bills.

How can you fix this problem? It all comes down to contacting a professional for a New Haven AC replacement. It’s important to ensure that you install an air conditioner that fits your home’s size and cooling needs.

Schedule a Service With Our Air Conditioning Experts

Why does your air conditioner turn off by itself? There are many potential reasons for this issue, which is why you should call an experienced heating and cooling company that will help you diagnose and fix the problem.
Air Specialties is here to provide you with a dependable solution, whether you’re dealing with a damaged AC compressor or a refrigerant leak. Contact us today to learn more about our CT air conditioning repairs!

Air Conditioner

Why You Should Switch to an Energy-Efficient AC Unit

If you’re looking for new ways to make your home comfortable while saving you some hard-earned cash, an energy-efficient AC unit is a great option. Not only can efficient air conditioners provide sufficient airflow you won’t find in standard units, but they also save you a ton of money and benefit the environment. If energy efficiency is calling your name, learn why switching to an energy-efficient AC unit is one of the best decisions you can make.

Air Conditioner

When Is the Best Time to Schedule AC Maintenance?

Your AC system experiences a lot of wear during the summer—especially if your thermostat is on a low setting. While you’re relaxing in the cool air, your air conditioner puts in the work to keep you comfortable. Although your system may seem like it’s pulling its weight and shows no signs of trouble, you shouldn’t forget to schedule maintenance services.

Boiler Furnaces Heating

Boiler vs. Furnace: What’s the Best Heating System for Your Home?

There are many ways to keep cozy during the winter months, from space heaters to fuzzy blankets. However, when temperatures fall, you need a home heating system to help you feel—and stay—comfortable all season long.


Why Is My AC Leaking Water?

Your air conditioning system is your best friend in the summer months when temperatures get so high that a simple fan probably won’t be enough to keep you comfortable. However, becoming increasingly reliant on the appliance means that you’ll be running it at an increasing frequency, and the more you run it, the more likely it is that you’ll have problems with it.

One issue that can be particularly distressing is if your AC starts to leak water. After all, its purpose is to cool the air inside the house down, so why would it spring a leak? 

Here are a few things that might be causing your AC to leak:

Clogged Drain Line

While the primary function of an AC unit is to cool the air down, it often ends up collecting water as a byproduct. Just like the droplets that form on a windowpane, when your AC unit pulls in air, it also gathers moisture on the evaporator coils. From the coils, the water collects in a drip pan that is eventually filtered outside via a drain line.

If your AC is leaking water, the first thing you should check for is a clogged drain line. Algae, fungus, and general pieces of debris can obstruct the flow of water and cause it to back up into your home. This is a relatively easy fix and entirely preventable with regular AC maintenance services

Frozen Evaporator Coil

A frozen evaporator coil is exactly what it sounds like: a piece of the air conditioner has become coated by ice due to some other issue in the system. With time, the ice can melt and fall outside of the drip pan designed to catch the runoff. When this happens, you’ll see water leaking from your AC.

However, the way to fix an evaporator coil that’s frozen is to resolve the issue that caused it in the first place. Simply thawing the equipment will help, but it won’t stop it from refreezing later on.

Low Refrigerant

One reason your evaporator coil might be freezing is due to a refrigerant leak. As a result, the pressure in the cooling system drops, which causes the temperature inside the machine itself to cool and ice over. However, if you do have a refrigerant leak, you want to call in a professional to make the necessary repairs.
To find out more about why your air conditioner is leaking water or to schedule an AC repair, call the Air Specialties team today!


How Does AC Impact Indoor Air Quality?

Air pollution is a massive health threat – triggering issues like allergies, breathing problems, and even lung conditions from poor air quality. And while you cannot do much about the air outside, did you know you could use your air conditioner to maintain the quality of air in your home? Let’s learn how an AC impacts indoor air quality and what you need to do to keep it pure.

How Does Your AC Influence Indoor Air Quality?

An air conditioner filters the air in the home. This air passes through a filter before being pushed through the vents. The air filter that sits in the HVAC system removes a variety of pollutants and particles that would otherwise enter your home.

A quality air conditioner is also able to regulate the indoor humidity, which again has a positive impact on the air you breathe – and ultimately your health. If the humidity levels are too high or too low, germs, bacteria, mold, and mildew can start to grow inside and cause even more health hazards.

Newer air conditioning systems are also equipped with advanced technologies like air purification systems, which could help to maintain good indoor air quality.

Common Indoor Pollutants

Dust is the most common issue in every home, especially if you live in a busy city with plenty of traffic and construction. Other pollutants include pet hair, dander, smoke, cooking smells, pollen, mold, mildew, bacteria, and viruses.

These pollutants result in issues like coughing, sneezing, fatigue, headaches, respiratory illnesses, and much more. If your air conditioner is not properly cleaned and maintained, it can be extremely harmful to your health as these pollutants can make their way into your home without leaving for months on end.

How to Ensure Your Air Conditioner Maintains Good Air Quality?

One of the best ways to maintain good indoor air quality is to properly service your air conditioner within the recommended timeframes. This includes changing and replacing the air filters every three months to remove any trapped pollutants. A clogged filter will not be able to remove pollutants and will force your air conditioner to run harder.

Regular air conditioner repair, servicing, and cleaning are effective at pre-empting issues before they turn into catastrophes, ensuring your AC runs optimally and maintaining good indoor air quality.

For indoor air quality services and AC services in West Haven, CT, contact Air Specialties today.

Air Conditioner

Why Should I Get A New Air Conditioning System?

Thinking about investing in an AC replacement is not a fun task for anyone because it’s rarely seen as an investment. More often than not, you may think that getting your air conditioning system replaced is a nightmare that you’d rather put off for as long as you can than take steps towards today.


Does My Air Conditioner Need A Repair?

When it comes to an air conditioner, it is, no doubt, a necessity in the spring and summer. With warmer weather outside, it is important to stay cool indoors. Luckily, regular air conditioning maintenance ensures your unit is working properly and efficiently. While maintenance is a great preventative measure, in some cases, a repair may be inevitable. Below we’ll shed some light on when maintenance can address the issue versus a repair being needed.