Ac and heating repair service near Setauket, NY

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.

The owner is the most honest mechanic I have ever been to. As a woman, I have been ripped off so many times, but I have been to this shop several times and the owner told me exactly what I needed. There were times he actually said that it was just minor problem (when I thought that it was major). He could have told me anything and I would not have known the difference. His oil changes are inexpensive compared to other shops and they are very accomodating with their time. I would highly recommend this shop.

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.

Fantastic service and fair dealings. It's rally hard to find an honest shop that you can trust and Dan and his son have always been top notch when we've dealt with them.

LISTEN PEOPLE, STAY AWAY FROM THIS LOCATION, THE OWNER IS A LIAR AND THIEF, TELLS YOU HE WON'T TRY AND SELL YOU A BUNCH OF SERVICES AND THAT IS JUST WHAT HE'LL DO, CAN'T BELIEVE PEOPLE CAN BE SO EVIL.