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Appliance Master Earns the Angie's List Super Service Award for 2018!  Learn More

Appliance Master Service Technicians

John Grennen


Photo for Appliance Master Technician John Grennen

John joined the Appliance Master team in 2018 and has made excellent progress in gaining experience on the breadth and depth of our service capabilities. Having attended the first Appliance Master Basic Training Course in June 2018, he was able to excel from the very first service appointments. He has been recognized for his diligent work ethic and eagerness to satisfy his customer's needs.


John, my tech, seemed thorough in his diagnose. Importantly, he explained my options re repair or replacement of the refrigerator. He worked neatly and confidently. Thank you very much....will use your company/ John again!
Glenn B - Branchburg, NJ - General Electric Refrigerator Repair
Excellent service...tech was very knowledgeable, friendly and personable. Issue fixed!
Robert B - Mendham, NJ - Samsung Refrigerator Repair
Well done service. Hopefully the new part (diode) will correct the problem. John is a nice guy!
Glenn L - Flemington, NJ - Frigidaire Ice Maker Repair
My technician was very knowledgable and professional!
Georgette M - Whitehouse Station , NJ - Samsung Washing Machine Repair
He is fantastic, punctual, and very knowledgeable.
Alison M - Somerville, NJ - General Electric Refrigerator Repair
We were given outstanding service by your Technician
Jeanne H - Basking Ridge, NJ - Jenn Air Refrigerator Repair
This is the second time I am using Appliance Master. I am very satisfied both the times.Thank you for your great service.
Mitra M - Flemington, NJ - General Electric Dishwasher Repair
Outstanding employee. He really knows his stuff.
George M - Flemington, NJ - Sub Zero Refrigerator Repair
Technician was polite, responsive and quick to assess the problem.
Ellen L - Bernardsville, NJ - Fisher & Paykel Dishwasher Repair
Professional and knowledgeable!
Georgette M - Whitehouse Station , NJ - Frigidaire Range Repair
He was friendly and competent. Answered our questions and was honest in his observations
Grace P - Flemington , NJ - General Electric Refrigerator Repair
Fixed on the spot and done right!
Jim M - Whitehouse Station, NJ - DCS Oven Repair
Outstanding employee
George M - Flemington, NJ - Miele Dishwasher Repair
John is the best. Nicest tech I've EVER worked with.
Annabelle H - Warren , NJ - Viking Repair
Tricky problem but John was persistent and super helpful
Adrienne A - Bernardsville, NJ - Miele Cooktop Repair
John was fast, efficient, friendly, and gave me good info on "reliability opinions on various brands of appliances" for future reference based on his experience. A good man and a very good technician. I'd invest more training in him as a "keeper"
Bob D - Gladstone, NJ - Miele Dishwasher Repair
The second serviceman whom you sent,John, was extremely reliable, knowledgeable and courteous.
Bruce B - Bridgewater, NJ - Whirlpool Washing Machine Repair
Fantastic response to urgent call. Competent tech
Richard T - Bridgewater, NJ - Bosch Dishwasher Repair
John was friendly and was excellent at explaining the problem and making the necessary repairs.
Linda H - Bernardsville, NJ - Sub Zero Refrigerator Repair
The technician was very clean and very respectful.
Cynthia O - Annandale, NJ - Dryer Repair
John G. was courteous, friendly, professional, good knowledge of the Miele Dishwasher issues and diagnostics.
Bob D - Gladstone, NJ - Miele Dishwasher Repair
Very knowledgeable technician easily riled my appliance
Mary S - Flemington, NJ - Kitchen Aid Refrigerator Repair
John is very good tech
Charles T - Bernardsville , NJ - Miele Dishwasher Repair
John worked very hard to diagnose our problem. He did a great job. We would definitely request him again.
Donna R - Annandale, NJ - LG Refrigerator Repair
I appreciate the honesty and guidance about what repairs may not be worth doing. That really earns my trust! Thanks.
Margaret D - Whitehouse Station, NJ - Samsung Dryer Repair
Nice tech. Knew what he was doing and has us on the way to a final solution.
Glenn L - Flemington, NJ - Frigidaire Ice Maker Repair
John was friendly, professional, and early. Explained everything that was happening and made the whole repair experience enjoyable.
Don H - Flemington, NJ - Samsung Dishwasher Repair
Third time I’ve used your help. All good experiences. Will use you again in future and highly recommend to anyone needing appliance repairs.
Frank T - Whitehouse Station, NJ - Samsung Range Repair
John was so very nice and professional!
Debbie M - Whitehouse Station, NJ - Frigidaire Refrigerator Repair

Technician was friendly and explained everything well.

Megan K - Somerville, NJ - LG Washing Machine Repair
Was extremely happy with your service
Rosemary R - Bedminster, NJ - Samsung Dryer Repair
Tech. was courteous, knowledgable and efficient
Peter G - Lebanon, NJ - Maytag Washing Machine Repair
John is great...so knowledgeable, patient & honest! Wouldn’t use anyone else.
Melissa L - Flemington, NJ - General Electric Refrigerator Repair
John was diligent, and really worked to solve a mysterious problem. He kept me informed throughout this efforts, and did not resort to any bluffs or defensiveness. He solved the problem in the end!
Margaret D - Whitehouse Station, NJ - Samsung Dryer Repair
John was great.
Judy D - Whitehouse Station, NJ - Kitchen Aid Dishwasher Repair
Excellent experience.
Bob R - Annandale, NJ - Whirlpool Dryer Repair
Professional texhnician
Karen F - Whitehouse, NJ - General Electric Dryer Repair

I was very impressed with John. He was friendly, knowledgeable and went above and beyond in every way to get my refrigerator up and running again.

Terry B - New Providence, NJ - Viking Refrigerator Repair
John was very efficient.
Debra S - Hampton, NJ - Kenmore Dryer Repair
Very personable technician
Peggy B - Summit, NJ - General Electric Oven Repair
Impressed that someone answered the phone when we called.....unusual in current business practices. Our technician was very polite and informative.
John W - Somerville , NJ - Maytag Washing Machine Repair
Very nice young man. Very knowledgeable!
Lorie B - Flemington, NJ - Maytag Refrigerator Repair
Excellent service—very nice young man arrived about 20 minutes after our call!
John W - Somerville , NJ - Maytag Washing Machine Repair
Wonderful friendly service.
Darlene R - Mendham, NJ - Whirlpool Refrigerator Repair
Excellent from first contact till end!
Ken D - Ringoes, NJ - Maytag Dryer Repair
Appliance Master is the first company we call for service and we are very happy that John is our technician. He is professional, thorough and respectful.
Shirley S - Lebanon, NJ - Kitchen Aid Dishwasher Repair
Good experience.
Stephanie M - Annandale , NJ - General Electric Washing Machine Repair
Polite,understanding of our dog, knowledgeable, and helpful technician.
Brian M - Annandale, NJ - Jenn Air Down Draft Repair
John is the only guy I will ever use from now on. He is the best!
Christine N - Bernardsville, NJ - Bosch Dishwasher Repair
We have used Appliance Master for years. We have always been pleased with the technicians and service. I appreciate the office help also. Our technician, John. He was exceptional in working on our refrigerator.
Susan S - Glen Gardner , NJ - Amana Refrigerator Repair
Tech was fantastic and very nice. Represents your company well.
Elana K - Flemington , NJ - Electrolux Dryer Repair

Your technican is one of the best I have ever worked with! He is so well mannered, very smart, extremely customer focused and a pleasure to work with. Definitely someone you should be proud to have on your staff.

William S - Glen Gardner , NJ - LG Range Repair
The technician explained the repair work in detail which we appreciated.
Jennifer R - Flemington, NJ - Whirlpool Washing Machine Repair
Tech was very thorough and explained options clearly.
Mark L - West Orange, NJ - Thermador Oven Repair
Good job. Clear explanations. Helpful analysis.
George B - West Orange, NJ - Bosch Dishwasher Repair
He was very courteous & knew what he was doing.
MaryEllen M - Gladstone, NJ - Amana Refrigerator Repair
Prompt service. Technician was knowledgeable and diagnosed the problem promptly. The unit was old and we decided the cost of a replacement item was not warranted.
Joe R - Glen Gardner, NJ - General Electric Refrigerator Repair
Personable and efficient
John - Lebanon , NJ - Miele Dryer Repair
John, the technician was right on time. He was polite and neat. The rubber door seals deteriorated and needed to be replaced. Nothing mechanical. I would recommend Appliance Master and also ask for John.
Mary Jane P - Lebanon, NJ - Bosch Dishwasher Repair
Excellent service very honest with me on whether or not to do the service the old machine.
Robert R - Annandale, NJ - Maytag Washing Machine Repair
Excellent service technician, very through,!
Leslie B - Stockton, NJ - Samsung Refrigerator Repair
John was great, knowledgeable, friendly and knows his job very well.
Joe A - Flemington, NJ - Fisher & Paykel Dishwasher Repair
All in all it was a wonderful experience
Joe A - Flemington, NJ - Whirlpool Dishwasher Repair
Seems the technician that you sent to our home was well knowledgeable and would recommend him
Rich G - Bedminster, NJ - Bosch Refrigerator Repair
Your tech John was an absolute tremendous, knowledgeable young man. He saw our problem and went over all the alternatives. He was a pleasure to have in our home.
Carl S - Bridgewater, NJ - Maytag Range Repair
we love john! thanks. pat thatcher
John T - Hampton, NJ - General Electric Oven Repair
John is wonderful and very efficient. We have used appliance master many times over the years and John is the best. Please let me have him as my “go to guy”!
John T - Hampton, NJ - Maytag Dishwasher Repair
The repair technician was very courteous and explained everything thoroughly.
Jennifer K - Flemington, NJ - Samsung Refrigerator Repair
John was extremely competent and knowledgeable. Upon completing repair on washer, he put everything neatly back in place which is appreciated.
Nancy C - Three Bridges, NJ - Whirlpool Washing Machine Repair
John was great, thank you!
Chris L - Flemington, NJ - LG Washing Machine Repair
The office personnel and John the technician were a pleasure to deal with. Both managed expectations well and completed the job on time and per the estimate. Good local company to do business with.
Bill C - Flemington , NJ - Electrolux Refrigerator Repair
My entire experience with Appliance Master was excellent.From the call to the service company to the actual service visit, everything was just perfect. The technician was extremely pleasant, professional, and excellent at his work. Top notch service!
Ellen K - Flemington, NJ - Samsung Washing Machine Repair
John was great. He explained the problems with my washing machine, provided options and genuinely wanted to do the best he could for my situation.
Patti M - Bernardsville, NJ - Whirlpool Washing Machine Repair
Appreciate the communication provided regarding schedule changes and updates
Joann C - Lebanon, NJ - Maytag Washing Machine Repair
John was great! I would definitely request him again next time i call, and I will be calling Appliance Master again! Great experience from beginning to end!
Jae A - Whitehouse Station , NJ - Jenn Air Oven Repair
No repair was done. Too costly vs a new dishwasher. Technician provided useful guidance re best machines to buy now.
David C - Bernardsville, NJ - Kitchen Aid Dishwasher Repair
Very professional, knowledgeable and personable.
Tim G - Bloomsbury, NJ - Samsung Dishwasher Repair
Great experience
Theo R - Basking Ridge, NJ - Miele Dishwasher Repair
John was very professional in assessing the problem with my washer
Lillian L - Whitehouse Station, NJ - Whirlpool Washing Machine Repair
Your service was impeccable and John did an excellent job and is a fine young man.i
Mary M - Chatham, NJ - General Electric Washing Machine Repair
Fast and very responsive. Customer service was excellent and very much appreciated
Bret S - Neshanic Station, NJ - LG Washing Machine Repair
The technician was very professional and seemed to be well equipped for the job. Very knowledgeable
Chris T - Chatham, NJ - Bosch Dishwasher Repair
John is very professional and helpful. He has fixed two of my appliances and he he has demonstrated a great deal of knowledge and expertise. I would trust him to fix any of my appliances
Susan W - Pittstown , NJ - Wolf Range Repair
John was very professional, polite, and skilled. We are extremely pleased with the experience and service.
Caroline F - Whitehouse Station, NJ - DCS Range Repair
John has come to my home twice now and he has been courteous, kind, and has taken the time to explain the repair to me; he even gave me some helpful tips on how to keep my washing machine running at its best. I will be requesting John in the future!
Kimberly D - Whitehouse Station, NJ - Kenmore Washing Machine Repair
Always good!
Linda B - Flemington, NJ - Maytag Washing Machine Repair

It was great news to get service within 24 hours of call. John was great and helpful, he made the repairs and was done fast.

Raymond M - Asbury, NJ - Amana Dryer Repair
John was very caring and professional. He answered all of our questions and tested the stove at a few settings before he left. He is terrific!
Cecilia H - Peapack, NJ - Peerless Premier Range Repair
First he took the precaution to check with the manufacturer with a question to avoid making a mistake. Then rather than order replacement parts he attempted a repair that was successful. The machine works fine now and we don't need another visit
Phillip A - Pittstown, NJ - General Electric Dishwasher Repair
Very thorough review of system upfront, assessment of problem and best way to go forward. Thank you.
Althea R - Bernardsville, NJ - Profile Dryer Repair
Our technician John was very courteous and capable, he is welcome back anytime
Jim C - Lebanon , NJ - Electrolux Washing Machine Repair
Our technician was very knowledgeable and did a great job explaining the issues.
Tim J - Flemington , NJ - Kitchen Aid Dishwasher Repair
John, the service person, was professional and found the problem right away.
Judy D - Whitehouse Station, NJ - Electrolux Dryer Repair
John was very efficient and courteous.
John K - Flemington, NJ - Kitchen Aid Dishwasher Repair
John is wonderful, and he was very patient with my mom.
Cecilia H - Peapack, NJ - Peerless Premier Range Repair
John expertly handled a stove repair which was quite complex. He also was very personable and professional and a delight to have around.
Gary H - Bridgewater, NJ - General Electric Range Repair
So impressed with our service. We will continue to use your technicians. Thank you for making it easier for us to get things done!
Georgia Z - Glen Gardner, NJ - Whirlpool Dishwasher Repair

Very good service call for diagnosis of the issue.

David B - Washington, NJ - Frigidaire Washing Machine Repair
Wonderful company!! Thanks for everything
Marcelo M - Hampton, NJ - Samsung Oven Repair
We have always been pleased with every technician that has come to our home. They are always professional and pleasant.!
Terry A - Glen Gardner, NJ - LG Dryer Repair
Very pleased with service. Technician friendly and professional.
Sandy K - Milford, NJ - General Electric Dryer Repair
Job well done.
Ken B - Hillsborough, NJ - Maytag Washing Machine Repair
John was great! He explained everything to us in detail, he knew his business. He was polite and fast, if I ever need to get something fixed again, I would like John to do it. I felt very comfortable with him coming in my home.
Bob / Robin S - Glen Gardner, NJ - Maytag Washing Machine Repair
Good service / good technician
Philip S - Oldwick, NJ - General Electric Dryer Repair
Technician very professional and pleasant.
Sandy K - Milford, NJ - General Electric Dryer Repair
John the technician was very informative and knew exactly what the issue was with our stove. He documented the failed component and ordered it before he left the house.
Dan S - Bridgewater , NJ - Frigidaire Range Repair
John was timely and kept us informed throughout the repair process.
John W - Bridgewater, NJ - Hotpoint Washing Machine Repair
Service tech. John , I found him very professional, he explained the problem and then showed me the part that needed to be replaced, also showed me that the exhaust pipe that I was using was not the safest,he changed it out to a safer one! Thanks
James H - Hopewell , NJ - Maytag Dryer Repair
Thank you
Annette K - Flemington, NJ - LG Washing Machine Repair
John G was polite and thorough with the repairs. He also provided advice and asked for any type of protection to use for my wood floors before he moved the appliance, showing he cared about the work he performed. Def would request John in the future.
Carlos D - High Bridge, NJ - Maytag Dryer Repair
John was very friendly and knowledgeable
Elizabeth N - Flemington, NJ - Samsung Dryer Repair
Every technician that has come for repairs has always been terrific. They are extremely knowledgeable and helpful. They explain what they will be doing and the cost. I highly recommend them.
Jane P - Stockton, NJ - Whirlpool Dryer Repair
Probably the best repair experience I've ever had. The room was cleaner when they left than before they got there. They were very thorough and treated everything like it was their own house.
Jeff H - Belle Mead, NJ - Whirlpool Dryer Repair
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John Grennen services appliances in the following locations

Annandale, NJ, Basking Ridge, NJ, Bedminster, NJ, Berkeley Heights, NJ, Bernardsville, NJ, Brookside, NJ, Chatham, NJ, Chester, NJ, Far Hills, NJ, Flemington, NJ, Gladstone, NJ, Glen Gardner, NJ, Green Village, NJ, Lebanon, NJ, Liberty Corner, NJ, Lyons, NJ, Madison, NJ, Martinsville, NJ, Mendham, NJ, Mountainside, NJ, New Providence, NJ, New Vernon, NJ, Peapack, NJ, Pluckemin, NJ, Pottersville, NJ, Raritan, NJ, Readington, NJ, Ringoes, NJ, Somerville, NJ, Springfield, NJ, Summit, NJ, Three Bridges, NJ, Warren, NJ, Watchung, NJ, Whitehouse, NJ, Whitehouse Station, NJ