This was a first year new install check up.of generator and heating system. He did a super great job servicing. Gabrielle did an outstanding job correcting an issue with a recent furnace installation. He was very professional and a hardworking and diligent technician. I have the highest regards for his effort.
Excellent work! Very informative about the service call and professional... Dieter Brothers thank you and continue to do what you do to keep up the good work...
Raymond Great service as always. Technician on time, polite, very professional, and excellent service. Thank you!
A replacement part for our furnace was installed by Vinnie (Deiter Bros). He was very professional and made recommendations to help with routine maintenance. I was very pleased with his work.
Vinny was prompt, courteous, efficient. He answered questions promptly and professionally. Vinny took the time to explain the programming, functions, and operation of new thermostats. Excellent job!
Another great job by Deiter Brothers. Gabriel Dietrich is excellent. He is a very hard worker, thorough, and really knows his stuff.
Brandon was polite and professional, and worked diligently to repair our furnace. He seemed knowledgeable and confident in what he was doing.
Woke up to boiler unit not working, they were here in a few hours. New shat was wrong immediately! Had part on the truck. Great customer service! Great employees from the office to the technicians. EXTREMELY! Knowledgeable and efficient..Quick response. We use for three propertiesl.
Dear folks, Ryan was great! He did a good job cleaning the furnace. I also asked him to check out a noise in my laundry room that I thought was connected with the furnace. It took a while for us to figure out what was making the noise. Ryan took the time and discovered that it was caused by an overheating plug- in for a cordless vacuum. God bless him. He may have saved me from having it cause a fire. Many thanks, Ryan! I appreciate your expertise and your time.
We have been Dieter Bros clients for years We have had other oil service companies before Dieter but have found the Dieter service to be unparalleled in the Lehigh Valley. Thank you Dieter for a job well done.
Gabriel I appreciate Miguel's professionalism, efficiency and knowledge and am confident in the work he did for the annual tune-up of my furnace.
Miguel Vinny was patient with all our pets yelling all day, worked quickly and kept me updated. He was a great guy and worked through the tough HVAC someone had done previously. This guy undoubtedly deserves a raise for his quality of work and ethic
Vinny 
Vinnie he was fantastic. The only complaint I have is that one of the issues (cold water not cold) he came to address is a problem that Deiter had already been out a few times to fix without success.
Vinny 
Vinnie is knowledgeable, professional, and a pleasure to work with. Deiter Bros has always done a great job for us for 35 years!
Vinny Gabriel took all the time he needed to look over my heating system; and when he was finished he took more to explain to me everything that I should be looking for and things I could be doing between visits.
Gabriel I had my Ac unit serviced today by Ryan Skoutelas , professional, courteous, very Knowledgeable of the job to be done. He cleaned up the area & left it immaculate. Highly recommend this company & Ryan.
I have used the Deiter Bros for the installation of my Generator and propane tank, along with service calls, the Techs are always very cordial and competent and get the job done! Highly reccomend them.
They always are respectful and knowledgeable. Ive been with them for 55 years and always recommend them.
Great service. Jeff D was professional and polite, worked with urgency, had a quick diagnosis, and happy to explain the situation in detail.
