Ac and heating repair service near Smithtown, NY

Excellent shop! I was having electrical issues with my 1996 Jeep and it proved very tricky to diagnose. The folks here were able to figure it out, fix the problems and do it for a very reasonable price! I have already recommended them to a few friends. If and when I need a mechanic again, I'll be back.

We take great pride in what we do LET US PROVE IT TO YOU! Full service and trusted local repair shop.... Let us be your shop

Providing Affordable and Professional Master ASE Certified Automotive repairs, both Foreign and Domestic. Cars/Trucks/SUVs

Dave and his staff at Diamond Auto do exemplary work, honest and done right the first time...always. Never an issue and always on time and often under estimate, I couldn't ask for a more professional and skilled shop. In a world where it is often lacking, Diamond Auto has integrity.

Warning please don’t go to these scammers, they charged me 700 to fix the heat in my car. Then go on to say sorry the heat only works on the passenger side and ac only works on driver side and to fix THAT issue they will charge me another 200 for diagnostic and from there it will be anywhere from 1k to 3k more. All they did was change the heat motor in the car which another Machanic I took it to said would have been 200. To top that off they left my driver side window open in the rain and now my car has a puddle in it. PLEASE be aware of these guys they will scam you I promise.