Brand Certified
CLS Mechanical, Inc.
4.9(59 reviews)
Certified by CLS Mechanical, Inc. • Feb 22, 2026
Business Details
3201 W Grand Ledge Hwy, Mulliken, MI
48861, United States
Certified by CLS Mechanical, Inc. • Feb 22, 2026
(517) 247-4030
Certified by CLS Mechanical, Inc. • Feb 22, 2026
https://clsmechanical.net/
Certified by CLS Mechanical, Inc. • Feb 22, 2026
About
Certified by CLS Mechanical, Inc. • Feb 22, 2026
HVAC ContractorAir Conditioning ContractorHeating Contractor
CLS Mechanical, Inc. provides residential and commercial HVAC and refrigeration services to Mulliken, MI, and the surrounding areas.
Location
Certified by CLS Mechanical, Inc. • Feb 22, 2026
Hours
Certified by CLS Mechanical, Inc. • Feb 22, 2026
Reviews
4.9
59 reviews
5 stars
56
4 stars
2
3 stars0
2 stars0
1 star
1
- LELuke EjakFeb 15, 20265.0I’ve now had two services completed by CLS Mechanical on my boiler home heating system. First in January when my heat stopped completely during below zero temps. I was grateful to find someone who could service my system as it’s sort of old tech and uncommon these days. Chris set me up after hours on a Friday night with an appointment first thing Monday morning. Fixing the problem took some clever outside the box thinking and some time but Chris and his team successfully installed the new gas valve and everything worked great again. Service Professor came here first the day before CLS and charged me for repairs but called the next day to say they can’t get parts for my boiler any longer. I called them back and got a refund but CLS had no problem using universal parts and never even mentioned that being an issue. The second CLS service was unrelated to the first involving an upstairs thermostat and a new actuator if I’m not mistaken. The old one had a bad motor. Again CLS came and installed a new one on the spot despite being very busy with other scheduled work this week. The work was completed in about 90 minutes and my heat works upstairs again no problem. I will definitely recommend them to everyone and continue to work with CLS for any future maintenance and repairs. Thanks Chris and everyone else for helping me stay warm this winter!!
- MMMichael MaguireDec 6, 20255.0Great communication, fast service, fair price
- TSThomas SkinnerNov 26, 20255.0Professional maintenance of heating systems. Eric and Jeremiah were courteous and very professional. They kept me posted with their arrival time. Installation of new thermostats which are easily monitored while away. Would highly recommend!
- AEali elbastNov 24, 20255.0CLS Great service great people they fix anything one time only the best
- AEAli ElbastNov 24, 20255.0Very good service on time and he fixed things one time it’s done
Frequently Asked Questions About CLS Mechanical, Inc.
Why is my AC running but not cooling?
There are a number of reasons why your air conditioner might be running but not cooling. The following are just a few of the many different possibilities.
One of the most common reasons why an air conditioner will run but not cool is because the evaporator coils are frozen. When this happens, air can’t flow properly through the coils, which prevents the AC from doing its job. The problem may arise as a result of dirty air filters, a malfunctioning fan or a refrigerant leak. Air filters should be changed at least once every three months. If you have pets in your home or someone suffers from allergies, change your filters more frequently.
Another common reason for not cooling is a dirty outdoor condenser. Your AC condenser is responsible for heat exchange and it is located outside at the mercy of the natural elements. Over time, dirt and dust can accumulate on the outdoor unit. It may even be blocking the airflow necessary for proper cooling. You can avoid this problem by keeping the area around your outdoor unit clean and devoid of bushes and trees.
It could be that you may have a refrigerant leak. If you have a refrigerant leak, your AC will run but not cool. In fact, it could even make your home feel warmer than usual. This is because the refrigerant is responsible for absorbing heat from your indoor air and releasing it outdoors. A lack of refrigerant will cause these heat-transferring abilities to be lacking. Signs of a refrigerant leak include ice buildup, decreased cooling and hissing sounds from your unit. If you suspect a refrigerant leak, contact us for repairs immediately. This is not a do-it-yourself job as it requires special equipment and training to diagnose and repair.
Why is my AC so loud?
Humming noises? Typically, humming noises are not indicators of serious issues with your AC. A humming noise could be due to vibrations of loose parts, such as a panel on your AC coming loose, motor blades, fan blades, or refrigerant piping. Some loose parts in your AC can be harmless and easily tightened or put back into place, whereas other parts coming loose can be a more serious problem. Any loose parts can turn into greater problems if not taken care of.
Banging noises? A broken or detached part will make a banging noise that sounds like it’s coming from inside your unit. Parts that could be broken or detached include a piston pin, connecting rod, crankshaft, an unbalanced internal blower, or a number of other internal parts. If a part of a compressor is broken or detached, it’s very likely the compressor will need replacing.
Whirring sound? If you hear something that sounds like a helicopter flying overhead, it’s commonly due to a malfunctioning fan in the internal AC or external AC. Malfunctioning fan blades can be ones that are out of place, spinning, or hitting something they shouldn’t be.
Whatever the sound maybe, if you hear something out of the ordinary, it is best to get your AC system checked out by a technician. Don’t wait for something catastrophic to happen before calling.
Why am I running out of hot water so fast?
We all know that dreaded feeling when you’re taking a nice hot shower, and then the water starts getting colder faster and faster so that by the time you’ve washed your conditioner out, you may as well be taking an ice bath. If you’re dealing with your hot water running out before you’re done using it, there could be a number of reasons behind this. Here are some of the culprits behind why you run out of hot water fast.
Sediment buildup. Water naturally has minerals and other sediments in it, and over time, these build up in your water heater. This build up takes up space in your hot water tank which reduces the capacity of water.
Bad heating element. At the bottom of your water heater is the part that heats your water. The upper element of it takes cold water and directs it down to the bottom, where it then heats cold water to your desired temperature. If your heating element goes bad, this lowers the temperature of your water and greatly affects how much hot water you get. So, if you start out with hot water, but then it goes cold fast, it could be that the water isn’t getting heated anymore.
Troublesome thermostat. Your water heater comes equipped with a thermostat that tells it how hot to heat your water to. If your water heater’s thermostat is having problems, this impacts how hot your water gets, which could mean it never reaches the temperature it should.
Why does my furnace have a weird smell?
All HVAC systems emit odor. Sometimes it’s good, and sometimes it’s bad.
Bad Smells to pay attention too
Rotten eggs
Melting plastic, metal or rubber
Smokiness
The key to staying safe is to never ignore when your furnace smells — knowing the reasons why it happens makes it easier to ask for help when it does.
1. Rotten Eggs
This smell is all too familiar to most people, but if you get a whiff of this in your home, it means there’s a gas leak that may be coming from your furnace.
If your house smells like rotten eggs, get everyone out of the house immediately and call your gas company. Make sure to remain somewhere safe until the leak has been repaired by the proper technicians.
2. Something Burning
If you notice an overheating smell or a burning smell from your heater, this could mean that a motor function or other electrical functions in your furnace are getting too hot. These types of odors are typically be described as:
Burning plastic
Hot metal
Melting rubber
Electrical
Unfortunately, these odors may indicate a component of the furnace is actually burning, and there’s a strong possibility for the problem to escalate and cause a fire.
If your furnace smells like something is burning, turn off your HVAC system and contact an emergency technician immediately. This smell is a sign of immediate potential danger and should be treated that way.
3. Smoke
Keep in mind that the smell of burning and overheating are not the same. Your furnace may emit a burning smell within the first 24 hours after starting it up for the season due to dust that has built up over the summer.
If you notice your furnace smells like smoke for longer than 24 hours, then it’s time to take action. Turn off your furnace at the breaker and shut off the gas valve. Call your HVAC technician and ask them to do a comprehensive check up.
How often should I change my furnace filter?
At bare minimum, change your filter as recommended by the manufacturer. This can be anywhere between changing every month to once in six months, it all does vary. Here are some signs that you may need to change your filter more often:
-Pay attention to the air quality of your home, are you dusting more frequently? Is there a strange odor? If so take a peak at your filter, it is probably time to change it.
-Is your heating bill higher than normal? A clogged filter will make your furnace work harder, which uses more energy.
-Change your filter more often if you are prone to allergies.
What services does CLS Mechanical, Inc. provide?
CLS Mechanical, Inc. provides residential and commercial HVAC and refrigeration services, including heating, boilers, cooling, commercial refrigeration, seasonal maintenance, and water heaters.
Where is CLS Mechanical, Inc. located and what are its hours of operation?
CLS Mechanical, Inc. is located at 3201 W Grand Ledge Hwy, Mulliken, MI 48861. They are open Monday through Friday from 7:30 AM to 4:00 PM and closed on weekends. They also offer 24/7 emergency services.
What payment methods does CLS Mechanical, Inc. accept?
CLS Mechanical, Inc. accepts American Express, Cash, Check, Discover, MasterCard, and Visa as payment options.
How can I contact CLS Mechanical, Inc.?
You can reach CLS Mechanical, Inc. by phone at +1 517-247-4030 or +1 517-323-8412, or by email at cls@asiserve.net. They also have a Facebook page at https://www.facebook.com/104170175972082.
What brands does CLS Mechanical, Inc. work with?
CLS Mechanical, Inc. works with York brand HVAC systems.
Does CLS Mechanical, Inc. offer emergency HVAC services?
Yes, CLS Mechanical, Inc. offers 24/7 emergency services for HVAC and refrigeration needs.
Why is my air conditioner running but not cooling?
Common causes include frozen evaporator coils due to dirty air filters or fan issues, dirty outdoor condenser units blocking airflow, and refrigerant leaks which require professional repair.
What should I do if my furnace has a weird smell?
A foul smell like rotten eggs may indicate a gas leak requiring immediate evacuation and contacting the gas company. Burning smells mean turn off the furnace and call an emergency technician. Smoke odors after 24 hours indicate a need for furnace inspection.
What nearby dining and entertainment options are close to CLS Mechanical, Inc.?
Nearby places include The Mulliken Roadhouse, which serves as a restaurant, bar, and pub, and MullikenRoadhouse, a music venue. Customers can enjoy dining or live music before or after visiting CLS Mechanical, Inc.
Are there any nearby automotive services near CLS Mechanical, Inc.?
Yes, nearby automotive services include Mulliken Foreign Car Service, Foreign Car Service, Sharp's Supply and M-43 Auto, and Senter Family Auto Repair, offering repairs, tire services, and oil changes for vehicle needs nearby.
What local shopping and community service locations are close to CLS Mechanical, Inc.?
Near CLS Mechanical, Inc., there is Mulliken Thriftway grocery store and gas station, Dollar General discount store, Mulliken Area Food Pantry, and the Mulliken Masonic Temple for community and shopping needs.
Brand Certified Facts from CLS Mechanical, Inc.
CLS Mechanical, Inc. partners directly with Yext to publish this data from the brand's official system of record. Learn more about our data sources
Certified February 22, 2026Yext Knowledge Graph
- Address
- Categories
- Geo coordinates
- Legal business name
- Hours of operation
- Phone number
- Official website