1400 Miller Parkway
McHenry, IL 60050
866-369-3057

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Local Reviews

Rated 4.9 out of 5 stars based on 5162 customer reviews

Excellent service!

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Excellent service.

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Excellent service.

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Professionals with quality service

Recently had two experiences with Black Diamond. Michael M. serviced our dead A/C and Keo V. came the following week to do the annual checkup on the AC/Furnace and Hot Water heater. Both gentlemen were ON TIME, efficient, informative and polite. I am not accustomed to service people arriving ON TIME...that was refreshing!

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Excellent Service

Clay was extremely helpful and knowledgeable throughout my AC service call.

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Great Work, very Professional

The team was on time and have done a very good job, also gave expert advice and sent the before and after pictures

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Great advice and great service.

Nice work and neatly done.

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Splendid Job

Could not be more happy. For that matter I have contacted Black Diamond about another job I want to get done and that is a backup for the sump pump.

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Great service

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Usual excellent service

Again you have come through, arriving within a couple of hours after my contact with you. There is an axiom in business that never fails: "What every customer wants is the best service and the best product for the cheapest price. The reality is that you can only have 2 of the 3." I choose Black Diamond every time because you deliver the first two every time!

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Job Locations

Alexander L.

Alexander L. Job Checkin

Air duct cleaning, air duct sealing


Raudel S.

Raudel S. Job Checkin

Hosebib is not working


Keo V.

Keo V. Job Checkin

AC chek up


Daniel B.

Daniel B. Job Checkin

Fan install


Matthew V.

Matthew V. Job Checkin

Installed customer supplied ceiling fan.


Keo V.

Keo V. Job Checkin

AC chek up


Raudel S.

Raudel S. Job Checkin

Per customer faucet is leaking


Raudel S.

Raudel S. Job Checkin

Per owner needs drain flange replaced


DOUG R.

DOUG R. Job Checkin

Timer install


Ryan M.

Ryan M. Job Checkin

Sump pump pit install


Raudel S.

Raudel S. Job Checkin

Drains are backing up


Gerad A.

Gerad A. Job Checkin

Electrician for whole house surge protector


Raudel S.

Raudel S. Job Checkin

Per customer needs kitchen faucet install


Matthew V.

Matthew V. Job Checkin

Installed 2 bathroom fans, one ceiling fan, and fixed doorbell.


Gerad A.

Gerad A. Job Checkin

Electrician in Algonquin