I had called Deiter Brothers for my annual service on my gas furnace. Setting up the appointment was easy and I was given a reminder 2 days prior. The technician Gabe arrived when I was told he would, and the job was done right. The area was clean when he left and he answered all the questions I had for him.I would definitely call Deiter Brothers next time I need work done.Mark Litak

Justin did exactly what I was expecting, to remove and stabilize old piping. He worked efficiently and really cleaned up at the conclusion of his work. Friendly and effective.And Deiter Bros price was very reasonable.Im very satisfied.

Joe Kline performed a difficult job replacing the regulators on my propane tank. I watched Joe figure out how to fabricate a new line and deal with fittings that hadnt been opened in over 20 years. Joe has a great personality and was friendly, courteous, knowledgeable and efficient. Im very pleased with Deiter Brothers and highly recommend the company for all your propane needs.

I cannot emphasize enough how amazing it was to work with Deiter Bros! My wife and I were stuck with an old AC unit and needed help. They picked up on the first call and scheduled us immediately! Keith Noble was our technician and I would recommend him to anyone. He was professional, helpful, intelligent, and FAST! We are planning to replace our entire unit and add mini splits. Keith and his staff are the reason I’m so confident to go back to Deiter Bros for this project. They have earned a customer for life!

I have used Deiter Bros twice now and I have been quite appreciative with their service. From the initial call to the tech coming out everyone has been professional and wonderful. They have been quick on getting out to help me and when they are here they are nice, professional and take the time to explain things to you. I would definitely recommend to anyone.

James Baione was super professional, helpful and respectful. He answered all my questions and concerns. I am a very happy new customer. The company is great. The driver that came later on to fill my propane tank (Bsmith) was also very nice and respectful. 😊

Patrick, from Dieter Brothers, was very thorough in evaluating and determining the problem with our water heater. He took his time in explaining everything he was doing. Not only did he make me feel he was a professional who actually cared about our problem, but he completely cleaned up the work area when he was finished.

Patrick was efficient, checked what has to be done to remove oil tank. Explained what would be done to remove tank. He was very friendly. I was pleased Deiter Bros would remove the tank as it was left here when previous owner switched to gas heat.

Jeffrey was thorough in performing our annual heating system maintenance and gave helpful feedback about our boiler. When you call Deiter Brothers, your call is answered by an actual person,, and everything is handled very efficiently.

We had our water heater replaced by Andrew and Keith from Deiter Bros. Great professional service! Quality work!Andrew and Keith installed the water heater, cleaned up, then took the time to explain the system and answer all my questions! Thanks!! I was also told if I have any more questions - just give them a call!!Extra Bonus - When you call Deiter Bros business you get a person not a machine!! Very Satisfied customer!

On time extremely knowledgeable and takes time to do things correctly. Fast clean and happy to help.

Best service by far in the areaVery professional and knowledgeableTruly care about their customersWould highly recommend to anyone in need of their servicesYou will not be disappointedGreat company

Kyle Kopp with Deiter Brothers was a very nice, on time and informative technician . We appreciate his knowledge and experience in servicing our central air unit.

I called for service due to a power outage that caused ac issues. They were out the next day and Kyle did a very thorough job. He took the time to explain to me what happened to the unit due to the outage. I asked a ton of questions and he was more than happy to answer them!

Great service. Friendly, explained what happened and why. Dieter Bros always delivers quality.

Highly recommend using Deiter Bros! Justin arrived on time, was incredibly professional, and knowledgeable about what was going on with my unit. He was able to alleviate the cooling issue that I had in my min-split as well as provide me with a quote on what needed to be done to permanently fix the issue. If you have any HVAC issues I highly suggest you call Deiter Bros to handle the issue!

Kyle came to inspect and clean my boiler. He was on time (about 12:15 in a 12-2 time frame) and was quiet, respectful and thorough.

They were wonderful!! Super helpful and professional and courteous when I called, and on time. Jeff Dillensnyder was also courteous and respectful and very helpful! I will request him for future services! Highly recommend these wonderful people!!!

Friendly, professional, competent, and affordable. Its good to do business with them.

GreenWorks Propane (remember those adorable lime green propane trucks?) was bought by Deiter Brothers several years ago, and Deiter Brothers has continued GreenWorks great service. GreenWorks sold me a thousand gallon propane tank, ran a line to the house and another line to a whole house generator and a third extension to our gas grill, and now Deiter Bros. has maintained that service and filled our tank, without fail, since 2011.When I called Deiter Bros. several evenings ago to report an intermittent smell of gas outside the house (not inside), they still showed up at 9am the next morning and patched several holes in the underground gas line, tested it for leaks and then came back today to replace an old regulator and to do another whole house leak test. They can do no wrong.

Always happy with Dieter Bros. service. Always on time, very professional and effiecient. Employees are very courteous.

Excellent customer service all around. Starting with the the customer service rep in initialing getting someone out - very nice and accommodating! CARLO was awesome! He was extremely pleasant and I felt as though he treated us as if we were family. Very kind, considerate and took his time in coming up with a couple different options for us. Due to the age of our boiler, we opted to get a new unit and he then looked into getting us electric heaters to use until installation. CHARLES came out the following day and we received the same quality of service - super nice and pleasant and looked for the best price. Would highly recommend this company!I just wanted to add a few more shout outs for the crew that helped install my new boiler and got my heat up and running - THANK YOU: DAN, RYAN, PATRICK, ANDREW & DUSTIN!! These guys are truly exceptional at what they do and take pride in their work. Just a great experience all around!! Kudos to you guys!

I’ve had HVAC companies in the past, service my equipment but Dieter Brothers is a cut above.Very happy with their tech’s, they seem to know a great deal about my oil, propane and a/c units which is great having one company to service all units. Terry was my tech today and I can’t say enough as to his professionalism and respect for my property.You can’t go wrong with Deiter Bros.

Terry and his helper were very neat, polite and did an excelent job on my burner.Thanks so much .Harry Gordon

Service tech (Jim) arrived on time for a safety check and leaktest of my 1000 gallon underground propane tank. He was very professional, knowledgeable and found/repaired 2 small leaks the regulator and valve of the tank at no extra charge. Very happy with the service.

Karlo did our annual furnace cleaning today. Karlo did an excellent job.We anticipate that this coming year -- like our prior four to five years -- we will have zero calls to Deiter Bros. for a No Heat emergency.

Clean, tidy, professional. These guys are the real deal. We went with a whole new system. The installation process was a breeze. Especially appreciated Charles with the quote was a no B.S., upfront assessment. Knew exactly what our layout needed. No up-selling or pressure. The turn-around time from quote to completion was unbelievably fast for this time of year. Highly recommend! 10/10.

Friendly and professional service tech did an awesome job. Found the problem and repaired it, quick and efficient. Thank you again!!!!

So I did - past tense - have a favorable opinion of Dieter Bros., but no longer. I requested an appointment online, received a text message confirming that someone would reach out to schedule. No one did. I had to call to follow up and get something scheduled. Somewhat frustrating, but I got an appointment scheduled in a reasonable timeframe. And I arranged my schedule to be available for my appointment today, only to get a call saying the technician called off, and my appointment is canceled. And the best Im offered are appointments two weeks from today when Im not available, so it would be 3 weeks out from now at the earliest. And all Im offered are excuses about people calling off, technicians out due to surgeries, and how busy you are. A simple apology would have sufficed, and some, or any, effort to reschedule my appointment sooner. Needless to say, Im taking my business elsewhere.

Jeff from Dieter Brother’s did our annualService on our Buderus Boiler.I told him @ issues we had at the end of last year and he checked everything out and replaced some parts etc. He was very professional and explained everything he was going to do.Please send Jeff back next year too!Thank you

Jeff was our service tech. He was very professional and pleasant! We overpaid in cash and he came back to hand my wife the difference in price. Absolutely amazing person and service!

Great customer service and extremely knowledgeable. They do whats best for the customers interest which is a relief. Thank you guys!!!

My hot water and heating stopped working and Kieth inspected and repaired my system and now everything is working perfectly! Very knowledgeable, professional, and quick worker. I am a first time home buyer who just moved in a few days ago. Kieth gave me an overview of my system and now I have a better understanding of everything. I would definitely recommend. Thank you Kieth and Deiters Bros team!!

Wonderful job ! Very responsible and efficient and knowledgeable. I personally ask for Patrick!

Andrew was so helpful and pleasant. My unit needed Freon and he got it done quickly and at a fair price. I highly recommend Andrew.

Very professional young man came to our home and performed our yearly air conditioner check up. He was on time, courteous, and explained everything that as done to my wife. I highly recommend him and Deiter Bros. Thank you!

Where to begin. They got our business by saying that they could install a ducted HVAC system when other companies could not. They brought all the supplies then realized they could not do it. So then they proposed a ductless system, several thousand dollars less than their previous quote (which they had said was the best deal). Money was tight, so we went with them and they installed it. It took at least 2 months for them to get it up and running because they werent familiar with the system and kept having to try different things. Annual maintenance was included in the contract, but when they came to do it, they wouldnt flush the system because they said they were worried it would break again. This winter, it got covered in ice and broke--we read the manual and they were supposed to install a cover to protect from snow and ice, but they hadnt. They came out to fix it and charged to replace a fan motor, even though the fan wasnt broken. We told them after that that we wanted the fix for free, because we had already paid them to diagnose it, and they had diagnosed it incorrectly (so we werent going to pay for more attempts at diagnosis). Left a message for a manager. A week later they said we need to find a new service provider because they refuse to do it.All we wanted is the system they installed to actually work, and for them to only charge for diagnosis once each time. Avoid them at all costs!

My boiler was leaking and needed general maintenance. Pat was very professional and knowledgeable.

Keith was very friendly and professional. Though this problem has taken a few visits and Keith and Kyle had to both come out at different times, he managed to get my a/c’s working again… Keith was our final tech and fitted the part required much to our relief.Kyle and Keith are both friendly, professional and skilled techs .

Mike always does a great job! Wont let anyone else service my HVAC.

Deiter Bros is always thorough, straight-forward, and effective. Terry and Gabe did a great job, left my place clean, and explained every step of the way.

Keith and Ashlee at Deiter Bros are extremely professional, helpful, knowledgable, and friendly. They fixed our A/C and provide our regular maintenance and service. The whole company has been great to work with!

Karlo was terrific. Highly knowledgeable and informative. He answered all of my questions and it appeared to me that he did a great job on servicing my oil furnace. Thank you, Karlo.

Charles Kicska provided excellent customer service! The installation of a new furnace and oil tank was seamless. Everyone was professional and tidy. Highly recommend!

We worked with Dieter Brothers for the installation of our new AC unit, and the entire process was seamless. Charles came out the same day, gave a quote and kept the entire process smooth. He and the team for the installation were professional, efficient and easy to work with!

Very knowledgeable and courteous would have these guys back any time. Name was Justin

Best service to date in the last month. Noises has been eliminated. Explained issue well. Very courteous.

Thorough, timely, professional and courteous! Very positive experience! Thanks for all your help!

Yes, Jeff did a good job. He was knowledgeable, answered my questions and his workmanship was neat.

Did a great job especially considering the heat in my attic

Jim installed the new propane tank, tested everything for leaks and relit the propane stove pilot light and tested it. He did a very good job in a timely, professional manner while dealing with heat, humidity and seriously unpleasant conditions.

Quick honest service. Strongly recommend

We are very happy with the service we received from Deiter Bros. We just had a new ac/heat pump installed. Charles gave us our quote and he was very thorough, polite, and informative. Dan and Ryan were very professional, clean, and courteous while installing our unit. I will highly recommend Deiter Bros. to everyone I know in need of HVAC work!

Repair of BlueRidge minisplit unit that was incorrectly installed by another company and had leaked. Besides a bit of sticker shock for what seemed like a simple patch and recharge, they were professional, courteous, prompt and most importantly fixed the problem! I also use deiter bros for my boiler needs, so I was pretty confident on their work 😉 Thanks guys!

Prompt and professional service. Great communication.

Timely arrival, I liked receiving an email with a photo of the technician who will be coming out! Repaired issues and tuned up AC. Thank you!

Jeffery was very professional. He was pleasant and went right to work. Deiter Bros. can be proud to have him as an employee.

Patrick was excellent! He put us at ease and diagnosed the problem quickly. I would highly recommend this company as well as Patrick!

We have been customers for 15+ years. Service has always been excellent and technicians courteous and knowledgeable. Kyle was here for our recent service call and located and fixed our issue in a few minutes.

Karlo arrived on time and did an awesome job, explaining what he worked on and replaced on the furnace. He left no debris or parts behind following his job. Thank you.

Keith was great, he took time explaining everything,, respectful, easy to talk to, fix the problem, just all around a great guy and worker.

Thank you for prompt, reliable service.Definitely your moneys worth with quality service.

Deiter Bros. have serviced our home heating and AC systems for years. They do good work!

Great service experience. Jeff was on-time, very professional and knowledgeable.

I have a rental property in Nazareth and last week, when the cold weather came to the Lehigh Valley, my tenant called me at 6:15AM to tell me they didn’t have hot water or heat. My tenants just had their first baby three weeks prior so my goal was to get this back up and running ASAP! I Called Deiter Brothers answering service and the lady on the phone was very polite, got all of my details and even confirmed the phone number and spelling of my name. Within 30-Minutes I had a technician call me and tell me that he was going to be leaving for my place within the next five minutes. I asked him to please reach out to my tenants to ensure it was a good time for them (remember, they just had their first baby and I wasn’t sure they were getting any sleep). To my surprise, he was totally okay with it. I expected a grumpy person because they were called out of bed earlier than they had expected but nope! This guy was very respectful and willing to help in anyway. I had a great feeling about this.Within an hour he had the problem identified and quoted me a price. Then I asked him how fast he could have the part and get the furnace up and running. At first I thought I would get the normal story of how he would need to order the part and come back – nope! He said he had the part and would have it completed once I gave him permission to do so.When he was done, he called me to let me know all was up and in good working condition. The tenant had heat and hot water. He also said he cleaned up after himself which I thought was such a plus!Later that day, I called my tenants to make sure all was good and they raved about how respectful he was while on site and how he worked as quietly as he could so as not to disturb the baby.I could not be any happier with their service crew, from the people that answered the phone to the technician that made the repair and if you’re having issues or if you’re looking for an upgrade – consider reaching out to Deiter Brothers in Bethlehem, you won’t regret it!

Deiter Bros installed a Generac standby generator at our home.. There were a few glitches along the way, including a shortage of generators, some very bad winter weather, and a delay waiting on the NJ inspectors to finally inspect the work.However, alls well that ends well, and we are very pleased with the high quality of the work done, and the professional and friendly pros who did it.For those interested, I would strongly suggest having the install done in the warm months if possible, which should facilitate a faster time frame.Just another note: 2 days after the generator was up and runnng we experienced a four hour loss of electricity. Let me assure you that when that generator comes on for the first time and you have all the electricity you need with no interruption, you will have a quick answer to the, was this generator worth the expense question...which is a definite yes

I have used them several times and they have always done a great job in getting things back up and running.

He did a good, thorough job. Very professional and courteous.

Tech performed AC coolant leak check. Very professional, quickly found the leak and quoted repair.

Troubleshot problem and fixed in a matter of minutes. Pleasant and respective despite having to install new part in 100 degree attic.

Thank you to Patrick for the great service! Though the problem was not initially apparent and despite being extremely busy, Patrick came back multiple times to ensure the system was properly functioning.

Identified an issue with rust protection of my underground propane tank and remedied it with installation of a new anode bag. The grounds looked as if they had never been there when they left.

Professional and quick service. He explained the condition of my heat pump. Thanks

I am usually very skeptical about services hoping I don’t get ripped off and so on but Cody and Keith showed up at a same day request which was very awesome, another company was a week and a half out until I could get an appointment. Cody and Keith were very nice and were able to find the issue with my AC. My AC is back up and running!! Price was very competitive to say the least and they didn’t try to up sell me something I didn’t need! I’d recommend their service! :)

Awesome, friendly service. They treat their customers like family.

Tech was professional and conscientious.

On time, and efficient. Welcome to return again as technician.

On time, courteous, efficiwnt, Repaired!

Very satisfied, as always with all Deiter Bros. services.

I dont understand business here why not do an outstanding job to please customers and get more business..why dont you people care..shopping around and first thing I look at is bad reviews..treat people fairly

Our AC decided to quit when the temps were in the mid-90s. Deiter Bros was able to come out first thing the very next morning, the problem was identified quickly, and we were up and running by 9:30am.

Very good company. Delivery on time and fantastic customer service experience.

Changes Zone valve for boiler based water heater

Very efficient worker, pleasant and polite.

This is how every business should provide customer service. I know how busy companies can be during peak season and can’t necessarily drop what their doing for me. But.....simple, real time, communication is all any customer can hope for. Amy, at Dieter Bros., did just that. Gerry came out in a couple of days, assessed my needs and gave me a quote immediately. Even though it won’t be for a couple of weeks, Amy scheduled my new install and all is well.So simple....Thank you Dieter Brothers.

They did a great job

The Y wire was disconnected which is why the A/C wasnt working, Justin fixed it in less than 1 hr

Excellent service, thorough and explained the problem and recommendations

Very polite and professional .Thank you.

Courteous and efficient.

Hello, had a service call for my a/c. Good mechanical outcome. I dont care for their business practice, nor customer service. They make you sign to the price quote, but do not disclose how they arrived at the price. Not transparent and when youre vulnerable, hard to know what to pay. I ended up paying $431 for a $16 contact switch and coil cleaning, and unit inspection; two hours of work, which the technician huffed about. I have an older unit, and the first approach is to offer to meet with sales team before discussing a repair. I dont think they are worth it. Looking for a mom and pop shop from here out

Propane tank installation, plumbing and coordination of inspection permits.

Good, honest work.

Service was excellent and was a 10 out of 10.

My heat died at 3 AM. I called Deiter Bros as soon as they opened. Ashley took my call and was very polite and helpful. She even called me 1/2 hour before the tech arrived so I could race home from work. Andrew the technician was amazing. He was thorough and very experienced. Andrew took his time and worked through all the issues, he was outstanding. I use to buy my oil from a discount company, but because of the service I received Deiter Bros they has my business from here on out. P.S. Andrew needs a huge pat on the back, great tech!!!!

Jeff did a great job!

I want to thank Mr James Dieter and his staff for all the help . They were exceptional and professional in fixing my trane heat pump. I highly recommend their services. I will for ever be in their debt they worked with me with a difficult situation.

They are always helpful and pleasant from the office workers to the delivery people.

Absolutely terrible customer service. I am a local business owner and was appaled at the lack of customer service provided.Their team was both rude and not helpful in all requests. Id steer clear and head to a company that appreciates local business

Very happy with the service