01/30/2025

10 Warning Signs Your Commercial HVAC System Needs Urgent Maintenance

A well-functioning Commercial HVAC System is crucial for maintaining a comfortable, energy-efficient, and safe business environment. Whether you own a retail store, office building, or industrial facility, your heating, ventilation, and air conditioning (HVAC) system plays a significant role in employee productivity and customer satisfaction. However, like any mechanical system, it requires routine maintenance to prevent breakdowns and costly repairs.

Ignoring the warning signs of a failing HVAC system can lead to increased energy bills, poor air quality, and even business disruptions. Here are the 10 most common signs your Commercial HVAC System needs immediate maintenance.

1. Unusual Noises Coming from the System

A well-maintained HVAC system should operate quietly. If you notice loud banging, hissing, rattling, or screeching noises, it could indicate loose parts, clogged ducts, or motor issues. Ignoring these sounds may lead to more severe mechanical failures, which could be costly to repair.

2. Inconsistent Temperature Control

Do you notice hot and cold spots throughout your commercial space? Uneven temperature distribution often points to issues with the thermostat, air ducts, or the HVAC unit itself. If employees or customers are constantly adjusting the thermostat, it’s time to schedule a maintenance check with Mannix Heating & Cooling.

3. Increased Energy Bills

A sudden spike in your energy costs without any major changes in usage patterns is a red flag. It could indicate your HVAC system is working harder than necessary due to dirty filters, leaking ducts, or aging components. Regular maintenance can improve efficiency and lower your utility bills.

4. Poor Indoor Air Quality

Your HVAC system plays a critical role in filtering and circulating clean air. If you notice excessive dust buildup, musty odors, or increased respiratory issues among employees, it could mean clogged filters, mold growth, or ventilation problems. Neglecting this issue can lead to health concerns and a decline in workplace productivity.

5. Weak or Limited Airflow

If certain areas in your building are not receiving adequate airflow, it could be due to blocked vents, a failing blower motor, or ductwork issues. Weak airflow reduces comfort levels and forces your system to work harder, leading to higher energy consumption.

6. Frequent Cycling or System Running Constantly

Does your HVAC system turn on and off too frequently? Short cycling can indicate problems with the thermostat, dirty coils, or low refrigerant levels. Conversely, if the system runs continuously, it may struggle to maintain the desired temperature, leading to excessive wear and tear.

7. Water Leaks or Moisture Around the Unit

Pooled water or excessive condensation around your commercial HVAC unit is a clear sign of a problem. Leaks can be caused by clogged drain lines, refrigerant issues, or damaged components. Ignoring this issue can lead to water damage, mold growth, and system failure.

8. Strange Odors from the Vents

Unpleasant smells coming from your HVAC system are never a good sign. A burning odor may indicate overheating electrical components, while a musty smell could be a sign of mold growth in the ductwork. If you detect any unusual odors, contact Mannix Heating & Cooling immediately for an inspection.

9. Aging System (10+ Years Old)

Most commercial HVAC systems have a lifespan of 10 to 15 years. If your system is over a decade old and requires frequent repairs, it may be more cost-effective to upgrade to a newer, energy-efficient model. Regular maintenance can help extend the lifespan, but an aging system will eventually need replacement.

10. Thermostat Malfunctions

A malfunctioning thermostat can make it difficult to regulate the temperature inside your building. If your thermostat is unresponsive, inaccurate, or requires constant adjustments, it may need recalibration or replacement. A faulty thermostat can lead to energy waste and discomfort.

Why Preventive Maintenance Is Essential for Your Commercial HVAC System

Regular maintenance helps prevent costly repairs, improves energy efficiency, and ensures a comfortable environment for employees and customers. Here’s why routine servicing from Mannix Heating & Cooling is crucial:

Extends Equipment Lifespan – Routine check-ups and timely repairs can prevent premature system failure.
Improves Energy Efficiency – A well-maintained HVAC system consumes less energy, leading to lower utility bills.
Enhances Indoor Air Quality – Regular filter changes and duct cleaning ensure clean, breathable air.
Reduces Emergency Repairs – Catching minor issues early prevents costly breakdowns.
Ensures Compliance – Many businesses must meet air quality and safety standards, which regular maintenance supports.

When to Call Mannix Heating & Cooling

If you’ve noticed any of these warning signs, don’t wait until your system breaks down completely. Mannix Heating & Cooling offers professional Commercial HVAC System maintenance to keep your business running smoothly. Our certified technicians provide:

✔ Comprehensive System Inspections – Identifying potential issues before they become major problems.
✔ Filter Replacements & Cleaning – Ensuring optimal air quality and system efficiency.
✔ Ductwork Inspection & Repairs – Addressing airflow and ventilation concerns.
✔ Refrigerant Checks & Adjustments – Maintaining proper cooling performance.
✔ Thermostat Calibration & Upgrades – Improving temperature control accuracy.

Schedule Your HVAC Maintenance Today!

Don’t let HVAC issues disrupt your business! Contact Mannix Heating & Cooling today for professional Commercial HVAC System maintenance.

Customer Reviews

Shondra J ones

They were lifesavers!!! My furnace went out and after three days of dealing with the home warranty company and the unscrupulous vendor they sent to my home, I called Mannix. The service technician was friendly, efficient but most of all honest. He found the problem after twenty minutes, saving me thousands in unnecessary replacement costs. It is refreshing to know that honest people still exist.

Lynne Wilson

I contacted Mannix from a referral of a friend who has benefitted from the excellent service this company provides. I found out a couple I know in Vienna had their heat pump stop working a few months ago and needed to be replaced. I called up the Mannix office later in the day on Monday 11/30/20 and provided information needed. I had a proposal in my email the next morning 12-01-20. This will enable me to discuss with my friends how they wish to proceed with fair financing options available too. This is EXCELLENT customer service and I would like Mr. Mannix to know that Sarah is an amazing professional face for his company. I plan to become a customer of theirs by signing up for the annual maintenance plan which is very reasonable priced. Sincerely, Lynne Wilson

Philip Slingerland

Been a happy Mannix customer for a few years now, but recently had them replace our aging HVAC system. The whole process was very painless, from Eric helping us decide which system was right for our home, to the efficient and professional installation by Billy and Matt. I am very pleased with the new system and very impressed with the level of service, communication, and detailed information I received from everyone involved. Highly recommend!

K.E.

Before dealing with Mannix I used two very well-known and “reputable” HVAC companies who did nothing but rip us off over the years. I was frustrated and found Mannix Heating & Cooling about 10 years ago. They installed a new HVAC system in my old home, and installed a water heater and various other items in my new home. They also have been doing yearly maintenance for years. Their employees are the most honest, reliable, and knowledgeable individuals in this industry. We recently had an issue with our HVAC system and they came out within a few hours on an emergency call. The technician was prompt, kind, professional, and very fair. He figured out what was wrong with our system quickly and remedied it immediately. Do not hesitate to call them if you need anything–you won’t regret it!

Wendy Collins

Mannix has always been professional from service calls to repairs and replacements. The technicians are always polite and knowledgeable. They consistently exceed our expectations.

Gary Hendricks

Mannix proved very responsive in fixing my A/C system. The tech, Erick, was very professional by taking the time showing and explaining to me the system problem prior to taking action replacing the coil. Ashleigh, customer service, was excellent in addressing and following through on concerns in order to achieve total customer satisfaction.

M. Reyzer

My 24-year-old heat pump finally decided to stop working. I sent a request for a replacement estimate late one night through the Mannix website and received a phone call early the very next morning to set up an appointment. Eric Holzworth stopped by my house the next day to go over my options. He was wonderful and so easy to work with and answered every question I had. He definitely listened to me and my concerns did not push me into purchasing a high-end system which I didn’t need. The technicians arrived at 8am and were finished with the entire installation by 1pm. They were very courteous and left my house in pristine condition. I HIGHLY recommend Mannix! They always returned my calls and emails right away, and Eric made sure I received all of my equipment on time–even with Carrier factory delays/limited supplies due to COVID. So glad I chose Mannix. I love my brand new Carrier system and my cold house during these hot and humid days.

M.B.

We were in desperate need of a fix on our AC system during the July heatwave. The issue arose on a Saturday. Mannix came to the rescue in short order, fixed it, and at a reasonable price.

Silvio G was the technician, and he was GREAT.

We would definitely use Mannix again!

Patricia Ryan

I have been using Mannix for years. They have replaced my HVAC system and I have them do maintenance twice a year. The past couple of visits have been done by Ramiro. He is professional, polite, knowledgeable, and very helpful in assisting me with tips on the best ways to operate my system. Today, he installed a water safety device and taught me exactly how it works and how to reset it. I’m so impressed with him! I will continue with Mannix for years to come as I find them to be very reputable and reliable. Thank you!

Rachel Craft

I’ve been using Mannix for years and have never been disappointed. They’ve replaced my HVAC, hot water heater and installed a humidifier on my furnace. Whenever I need them, they can get me on the schedule in a timely manner. All the personnel are great and I trust Jerry and his team with their recommendations and the work they do. Would highly recommend.