4 stars
I usually have to call to schedule back flow on sprinkler system otherwise I would give 5 stars
By GEORGE F.
Saturday, November 7, 2026 · Customer reviews of US businesses
The Fair Hearing score
Great
213 reviews
Select a line to read only those reviews.
Honesty, pricing, process and quality scores appear once 5 customers have rated them.
Since 1946, people have trusted Koorsen to protect their businesses and homes. From our knowledgeable sales people to our highly trained technicians, we have been committed to providing complete fire protection and security solutions that don’t just protect buildings—but protect lives too.
Koorsen Fire & Security (koorsen.com) has 213 customer reviews on The Fair Hearing, with an average rating of 4.2 out of 5.
213 approved reviews, newest moderated first
I usually have to call to schedule back flow on sprinkler system otherwise I would give 5 stars
By GEORGE F.
Seems Koorsen bought Northern Fire .All of a sudden the same service I get every year just went up over 400% .I am with Kelvin Sun from Mt Pleasant Mi.What's going on.Will be contacting everyone in the State of Mi who will listen about this deceiving increase,and I mean everyone! Outraged.
By Brian
Koesen Fire toke over my local company(Mount Pleasant, Michigan) got my 1st bill today, it is jump 400%.( from $150 to $540) what is gone on????
By kelvin S.
Still waiting for 2 smoke detectors to be recalibrated because their activation threshold is too high?
By Fred W.
Almost impossible to get a hold of someone from this company. Rumor has it they do great work, though i wouldn't know. Went with Habitec instead, they have been amazing.
By BSF
Pro: Good & Courteous service by technician. Con: No paperwork was left by technician indicating the services performed or outcome of the inspections. We also have no idea what the cost of the service was.
By Lynette 1.
The tech's are very good but the office not so much
By Roger V.
Great service, very kind and professional team!
By Kim S.