(866) 350-4793
Available 24 Hours(866) 350-4793 Serving Chicagoland & More
Call Today(866) 350-4793 Serving Chicagoland & More
Basic Program Benefits
  • No dispatch fee EVER ($79 per call).
  • No afterhours or holiday fees EVER ($95 per call)
  • Annual precision tune-ups on heating and cooling equipment
  • 24/7 availability
  • Exclusive discounts on service and repairs
  • Peace of Mind
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Illinois’ Leading Heating, Air Conditioning,
Electrical & Plumbing Contractor

Reliable Service in McHenry, Crystal Lake,
Cary, Lake in the Hills & Beyond

Black Diamond Plumbing & Mechanical is a reliable heating, air conditioning, plumbing, and electrical company located in McHenry, IL. Serving the Chicago suburbs since 1999, our family-owned and -operated company is friendly, reliable, and affordable to bring your home or business total comfort. Along with 24/7 heating and air conditioning repair, we also fix plumbing, electrical, and sewer problems 24 hours a day, 365 days a year.

When you schedule service with us, you are getting not only professionals with years of experience, but also fast and friendly service. What are you waiting for? If your home or business is in the Chicagoland area, call Black Diamond!

To schedule an appointment for HVAC services, simply contact us online or give us a call. Our phones are always on and our team is always ready to bring you the services you need—no matter the time of the day.

We proudly serve homes and businesses in:

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start your career at Black Diamond today
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Why Black Diamond?

24/7 Emergency HVAC, Plumbing & Electrical Repair

Unfortunately, breakdowns happen—and sometimes at the most inconvenient time! When you need to schedule a furnace or HVAC repair—and fast—look no further than Black Diamond Plumbing & Mechanical. Our technicians and plumbers offer 24/7 emergency repair service to get your home or office back on track. Whether it’s a weekend, a holiday, or 2:00 am, our friendly technicians can be there when you need service most.

HVAC, Plumbing & Electrical Services in the McHenry Area

As a full-service home service company, we have your needs covered. During the summer, count on us for reliable air conditioning services, and you can on our heating and furnace services in the winter. When you need reliable HVAC, plumbing, and electrical services in the suburbs of McHenry, count on Black Diamond Plumbing & Mechanical. Check out some of our expertise below!


When you need to schedule a repair, count on Black Diamond Plumbing & Mechanical. Our family-owned and -operated company can repair your plumbing, electrical, or HVAC system in no time. Call us if you need a professional to repair your:


Maintenance is important to ensure your systems are functioning properly and safely. With annual maintenance on your heating system, air conditioning, plumbing, and electrical fixtures, you can ensure everything is working efficiently—which will allow your units to work longer with fewer breakdowns and costly issues.

We offer maintenance plans to ensure your units are getting the best possible service all year long. Learn more about our Crystal Club memberships to benefit from maintenance, repair discounts, and more!


If you are looking to install a furnace, heat pump, air conditioner, toilet, sink, or electrical fixture, Black Diamond Plumbing & Mechanical has you covered. Our technicians are experts when it comes to installing new units in homes and businesses. We ensure you are getting the correct sized HVAC unit, water tanks, circuits, and more so your units last longer and work efficiently.

To get a quote on an installation, give us a call.


Unfortunately, HVAC systems, plumbing, and electrical fixtures can’t last forever. When you need to schedule a replacement, count on the experts at Black Diamond to replace your:

  • Furnace
  • Heat pump
  • Air conditioner
  • Toilet
  • Sewer pipes
  • Water tank
  • Electrical circuits
  • And more!

HVAC Products

Did you know that HVAC systems typically last about ten years? If your furnace is on its last season or you simply want to replace it to increase efficiency, count on our team at Black Diamond. We specialize in high-efficiency HVAC systems designed to increase your indoor comfort and save you money on utility bills. And whether we’re replacing a leaky faucet or installing a state-of-the-art heat pump, we always offer the most reliable and trusted brand-name products on the market.

  • Amana
  • Aprilaire
  • Kohler
  • Moen
  • Honeywell
  • Leviton
  • Generac
  • Square D by Schneider Electric
  • Intermatic

About Our McHenry HVAC, Plumbing & Electrical Company

Black Diamond Plumbing & Electrical is a full HVAC, plumbing, and electrical company that serves homes throughout McHenry, Cook, Kane, DuPage, and Lake counties.  We believe that our success is based on three simple principles:

  • We always answer the phone – Day or night, 365 days a year, your call will always be answered by a Black Diamond employee.
  • We do what we say we are going to do – Our professional, prompt technicians will arrive when we promise. With our flat-rate pricing, you always know the price before we do the work.  No hidden charges, no extra fees.
  • We surround ourselves with the best people – We hire professional employees that are willing to help our customers no matter what. With their “whatever it takes” attitude, you can rest assured that we’ve got you covered.

When you need professional HVAC services on the North Shore, count on the experts at Black Diamond. Give us a call or contact us online to schedule service.

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Frequently Asked Questions

How often should I have my equipment serviced?
In order for your HVAC equipment to run safely and efficiently, your furnace and air conditioner should be inspected once per year. The best scenario is to have the heating system checked in the fall and the air conditioning checked in the spring before the full heating or cooling unit begins.

Why should I have my equipment serviced?
Annual servicing includes cleaning the system, checking for any problems or potential issues, and adjusting for peak efficiency. The benefits include:

  • Increased dependability
  • Maximizes efficiency which lowers energy costs
  • Increased life span of the equipment
  • Maintains a safe operation
  • Reduces the chance of a breakdown

My water bill is very high. Could this be a plumbing problem?
It very well could be. Although there are many reasons that this could happen, faulty toilets are to blame most of the time. Your outside hose bibs can also be the cause. Call Black Diamond and we will help isolate the issue and get those bills down to normal.

There is a bad smell near my sump pump. What could be causing this?
This is often an indication that there may be a break in your sewer line allowing sewage to seep into your drain tile. Using our sophisticated camera equipment, Black Diamond can inspect your main sewer line to see if this is indeed the issue.

Why do I need a generator?
As more and more businesses and residential areas are added to the electrical grid, the amount of power available is spread thinner and thinner. This creates more and more power outages or partial outages. A generator can protect your home and family in case this happens by supplying standby power to your crucial systems like security, furnaces, sump pumps, and refrigerators. With our intense storms in Illinois, you can’t afford to go without a generator.

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The Black Diamond Advantage:
We Offer Financing