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7 Major Signs You Need to Call an HVAC Repair Service

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Nearly 24% of homeowners experience a problem with their air conditioning systems that require professional services each year. Additionally, more than 20% of homeowners experience issues with their furnaces. 

There’s no doubt that your HVAC system is an integral part of your home. Naturally, you need it to work well, but this isn’t always the case.

An HVAC system can experience problems, and it’s essential to know when to call for HVAC repair service

You might have times when you know that you need HVAC repairs, but other times might not be as obvious. However, it can be helpful to learn the signs that you need repairs. 

If you’d like to learn the signs, keep reading. This guide explains seven signs that indicate you should call an HVAC company for repairs.

1. Your System Won’t Turn On

The most obvious sign you need to contact an HVAC repair company is when your system won’t turn on when you adjust the thermostat. For example, if you turn the system to “cool” and nothing happens, you’ll need help.

Of course, you might want to check a few things before calling. The primary thing to check is the circuit breaker. If you have a tripped circuit, it will prevent the system from running.

The other thing to check is the thermostat settings. For example, make sure the button is moved all the way to heat or cool, depending on your need. Next, make sure you adjust the temperature to ensure that it kicks on. 

If you can’t get the system to turn on, you’ll need to contact your local HVAC company. 

2. The System Isn’t Heating or Cooling

The next sign indicating you need services is when your system isn’t cooling or heating your house properly. 

For example, if it’s hot outside, you’ll turn on your AC. However, if the air coming from the vents isn’t cool enough, it will never cool your home. The same is true with your furnace if the air isn’t warm enough. 

In many cases, you can avoid this problem through proper HVAC maintenance. However, problems can still arise.  

When a system runs but doesn’t cool or heat your house enough, it might be due to restricted airflow. It could also be a result of low coolant during the summer months when you use your AC system. 

Experiencing these HVAC problems is common, and a repair company can diagnose and repair a system when these issues occur. 

3. You Hear Noises From the System

If you hear strange noises from your system, you should search for “HVAC repair service near me.” An HVAC system shouldn’t make abnormal sounds, so you’ll know there is a problem when this occurs. 

You might hear clicking, grinding, or banging sounds coming from the device. You might also hear loud squeals from it. 

There is a problem with a component if it makes these sounds, and you shouldn’t ignore the noises. Instead, contact an HVAC company and tell them what you’re hearing.  

4. It’s Turning On and Off

Next, you’ll need to find the best HVAC repair service company if your system keeps turning on and off. HVAC technicians call this “short-cycling.”

When a system short-cycles, it turns on to produce heat or cold air as needed. However, it shuts down rather quickly after turning on because of a problem. The process then continues to cause the system to turn on and off.

The question is, what is the problem causing this to happen? Your system will continue short-cycling until you address and repair the problem. 

An AC system might do this if it’s low on coolant. A furnace might do this if the air filter is too dirty. 

5. It’s Producing Odors

You might also discover HVAC issues from odors you detect coming from the system. Again, your system shouldn’t smell bad. Therefore, if you smell anything unusual in your system, it indicates a problem.

For example, you might smell a burnt odor from the device. You might also smell a chemical scent. You might not even know what it smells like, other than a foul odor. 

You should shut off your system if you detect odors and contact an HVAC repair company for help. 

6. The System Is Leaking

A furnace generally doesn’t leak water, but an AC system can. A furnace can experience a gas leak, though. If you detect the smell of gas near your furnace, you must seek immediate help from an HVAC company. 

A gas leak is dangerous and needs repairs quickly. 

A water leak from your system also requires repairs. However, water leaking from a system is not an emergency situation. 

Water often leaks from an AC system from condensation. Most systems have a condensation line that drains the necessary water from the system. If you have a lot of water next to your system, there is a bigger problem. 

7. It Keeps Running

Finally, you should contact a company for help if your system keeps running. For example, if you turn on the AC to cool your home, it should run for a while and then shut down. It should not keep running for hours at a time.

This issue might be due to a lack of maintenance, but another issue could also cause it. 

You might want to ask the HVAC company to check it out to see why this is happening. You can also ask them for tips to improve the efficiency of the system, so it doesn’t run as often. 

Call Now for HVAC Repair Service

When you experience these issues, you probably need HVAC repair service. Your HVAC system can experience these problems anytime, and they can happen out of nowhere. 

Proper maintenance might help you protect your system more, helping you to avoid sudden issues, but you can still have problems. 

If you need services in the Hayward, CA area, contact us. We can diagnose and fix any issues with your HVAC system, so call today to schedule an appointment. 

Sameh t
Author: Sameh t

— 60 Comments —

  • img-4
    Olivia Smart Thank you for explaining that your unit should never smell bad. I've noticed some musty smell from our AC unit over the last few days. I'll be sure to call someone soon to help us with this, since it seems like it could be mold that is growing. Reply
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    Kate Hansen It was helpful when you said that your AC should not run for hours after turning it off. My husband and I have noticed for the past couple of weeks how our air conditioner will stay on for a couple of hours even when we turn it off. We'll have to look into hiring an HVAC contractor that can repair our system for us. Reply
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    Luke Smith I like that you mentioned how leaks are signs that the air conditioner is in need of repair. I've been seeing marks of dried water on our wall lately and I think it came from our air conditioner. I wouldn't want to risk it breaking down completely so I should call AC repair services as soon as possible. Reply
  • img-7
    Brent I like it when you said that proper maintenance might help you protect your system more. This is true! Personally, I don't wait for an issue to come up before I call am HVAC professional. Reply
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    Olivia Smart Thank you for explaining that any leaking is a bad sign for your AC system. I've been wondering what I should look out for if I need some repairs done. I'll be sure to keep an eye out for this, just in case I run into it in the future. Reply
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    Erwin Osborne "Great information! These are the major problems for your HVAC system that leads to the replacement to get a new one. You should always look for regular maintenance of your cooling system if these are the problems that are bothering the HVAC system. Thanks for sharing it." Reply
  • Why Is My Air Conditioner Not Cooling the House? • Home Tips […] accessing the evaporator coil is difficult, it is best to have an HVAC professional have a look at your […] Reply
  • img-10
    Victoria Addington It was fascinating to know that strange noises from the system are an indication that it needs repair. My sister told me that their AC unit is producing strange noise. I should advise her to hire a reliable HVAC contractor to handle the AC repair. Reply
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    Mia Evans Thanks for pointing out that we need to shut off the system as soon as we detect odors and call contactors as soon as possible. I will keep that in mind once move into my own flat this year, so I will be safe even when I live on my own. It would help if I already have a contact number of a cooling system service that I can trust as early as now near the area where the flat is. Reply
  • img-12
    Charlotte Fleet My parents turned on their AC and it started producing strange smells. Thanks for mentioning how odors are a sign to hire HVAC repair. I'll have my parents get their system repaired professionally. Reply
  • img-13
    Max Jones Thanks for the info about HVAC repair. My home's heating system is not working. I'll look for an HVAC contractor who can fix the problem. Reply
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      Justin Krupp I must say that you have shared an admirable blog it is very helpful for the peoples who want to enjoy and work out simultaneously. Reply
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    HVAC West Jefferson Dirt, and Gas is my main problem to call HVAC repair service. Reply
  • img-16
    Tyrone Loukas It’s no secret that the summers can be brutally hot. And while most of us have air conditioners to help keep us cool, it’s important to remember that these units need regular care and maintenance to function properly. Otherwise, you may find yourself dealing with a broken AC unit in the middle of a heatwave Reply
  • img-17
    Jessie Holloway Thanks so much for pointing out that if your system is starting to smell it's a bad sign. My brother's HVAC system just recently started producing a weird smell. So we're looking into what that means and if we need a repair. Reply
  • img-18
    Jessie Holloway Thanks so much for pointing out that if your system is starting to smell it's a bad sign. My brother's HVAC system just recently started producing a weird smell. So we're looking into what that means and if we need repairs. Reply
  • img-19
    David Grace An HVAC system is an essential part of any home or building. Regardless of the outside weather or time of year, an HVAC system helps maintain comfortable environmental conditions within a building by heating and cooling rooms. Reply
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    Harith Alex HI, I'm Alex, I'm an HVAC professional at Dallas. I would like to share so much information about HVAC services that must be helping to others. Also i would like to tell u that an HVAC system is an essential part of any home or building. Regardless of the outside weather or time of year, an HVAC system helps maintain comfortable environmental conditions within a building by heating and cooling rooms. Reply
  • img-21
    John Carston I like the tip that you gave that you should still consult a professional if your unit is still running but malfunctioning. My wife and I used to think that the strange noise from our air conditioning unit was normal until it broke down last night. I'm glad you helped me learn more, I'll be sure to consult a trusted air conditioning repair service to fix our air conditioning unit and provide preventative measures. Reply
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    Braden Bills I want to make sure that my heating system works properly. It makes sense that working with an HVAC specialist would be important. They would be able to ensure that my system works properly. Reply
  • img-24
    leith hvac Less heating is needed in summer and more in the winter. With HVAC zoning, you save energy by carrying out selective heating and cooling throughout the year. You only need to purchase a quality, energy-efficient HVAC unit for maximum energy savings. Reply
  • img-25
    Matthew Johnson I'm an HVAC professional at Dallas. I would like to share so much information about HVAC services that must be helping to others. Also i would like to tell u that an HVAC system is an essential part of any home or building. Regardless of the outside weather or time of year, an HVAC system helps maintain comfortable environmental conditions within a building by heating and cooling rooms Reply
  • img-26
    crewairconditioning For some years, technological innovations have been happening at exponential pace. If you are using a decade old heating and cooling system, there are strong chances that you are not reaping the full benefits of progression in HVAC technology. Reply
  • img-27
    Eli Richardson Last night, we turned on our air conditioner for the first time in months, but after a few hours of working fine, it started making weird sounds and stopped blowing cool air. That's why we'll follow your tips and find a technician to get it inspected, and we'll also take better care of our system by investing in maintenance. Thank you for the insight on identifying when our HVAC unit needs professional repair. Reply
  • img-28
    Kristofer Van Wagner I appreciate that this post shared that when looking to have air conditioning installed, it is best that we ensure that it is made by professionals. My wife and I are planning to have new units set up. I will look at hiring professionals. Reply
  • img-29
    maxcomfortheatandair This is the reaosn why HVAC is very essential. HVAC systems help you achieve more savings when it comes to energy bills. Gone are the days where we used fans and old-school air conditioners to feel cooler inside a building or fireplaces to keep us warmer. We also don’t have to waste energy when we forget to turn them off at night because modern HVACs are now automatic. Reply
  • img-30
    Jessie Holloway Thanks so much for talking about some example noises you might hear if your HVAC system needs repair. My parent's AC unit has been making an awfully loud noise whenever it starts up to cool the house. My parents have been looking into calling a professional down to come to fix the thing so they don't get a heart attack every time the system turns on. Reply
  • img-31
    Michelle Taylor This is very informative. I definitely agree that foul odor coming from your AC is a major sign that you need to contact an HVAC professional. We experienced the same thing and it turns out that there was a leak from our system. I'm glad that Anderson Air https://andersonair.com/service-areas/bella-vista/ was able to fix it as soon as possible. From what I heard, these leaks could be dangerous and must be fixed immediately. Reply
  • img-32
    Michelle Taylor This is very informative. I definitely agree that foul odour coming from your AC is a major sign that you need to contact an HVAC professional. We experienced the same thing and it turns out that there was a leak from our system. I'm glad that Anderson Air https://andersonair.com/service-areas/bella-vista/ was able to fix it as soon as possible. From what I heard, these leaks could be dangerous and must be fixed immediately. Reply
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    Iris Smith My grandfather claims that because he doesn't have an air conditioning system and lives in a hot area, he is being negatively impacted by global warming. I like how you mentioned that having HVAC difficulties is normal and that a repair firm can figure out the problem and fix the system. My grandfather's new AC system will be installed by an expert, and I'll advise him to call an expert for repairs if he notices any problems. Reply
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    Iris Smith My air conditioner has been blowing an unpleasant stench lately. Your advice to contact an HVAC company right away if you smell gas close to your furnace struck a chord with me as useful. I want an HVAC service to check on my air conditioner. Reply
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    Tyrone Loukas I must say that you have shared an admirable blog it is very helpful for the peoples who want to enjoy and work out simultaneously. Reply
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    Millie Hue Thanks for pointing out that an AC repair is already a must when your unit is not turning on even when you adjust the thermostat. My best friend mentioned that this is the issue with her unit earlier this afternoon. She has to stay with me here in my house because of that, so I hope that the professionals would be able to fix the issue as soon as possible once she hires one tomorrow. Reply
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    Tyrone Loukas An HVAC system is an essential part of any home or building. Regardless of the outside weather or time of year, an HVAC system helps maintain comfortable environmental conditions within a building by heating and cooling rooms. Reply
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    Tyrone Loukas HVAC system helps maintain comfortable environmental conditions within a building by heating and cooling rooms Reply
  • img-41
    Tyrone Loukas The truth is, your air conditioner requires regular care to maintain its performance throughout. Therefore, you shouldn’t put off scheduling your AC maintenance longer to ensure it runs well. Reply
  • img-42
    Adim I've had my fair share of HVAC issues, but your post has enlightened me about the importance of regular check-ups. Prevention truly is better than cure! Reply
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    Willie Jenkins "HVAC systems: the unsung heroes of comfort, ensuring our spaces are perfectly heated, cooled, and ventilated with seamless efficiency." Reply
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    Willie Jenkins "HVAC systems: the unsung heroes of comfort, ensuring our spaces are perfectly heated, cooled, and ventilated with seamless efficiency." Reply
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    Lawrence Rivas "Regular AC service ensures optimal cooling efficiency and prolongs the lifespan of your unit, making it a smart investment for comfort and savings." Reply
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    Justin Krupp HVAC systems: the silent choreographers of comfort, seamlessly orchestrating heating, ventilation, and air conditioning for optimal indoor environments. Reply
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    Lawrence Rivas Efficient HVAC systems ensure optimal comfort and air quality, regulating heating, ventilation, and air conditioning for residential, commercial, and industrial spaces Reply
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