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Rave Reviews From Happy Customers

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  • I highly recommend Guaranteed Service for any HVAC installation and or service work.

    “Very impressed with the quality and expeditious service received from this contractor. They performed a complex boiler installation in my home. I am a professional engineer and am extremely satisfied with the work performed. They completed the installation on time, and in a very neat and workmanlike manner. I had a minor problem, and they came on a Saturday morning to sort this out. I highly recommend Guaranteed Service for any HVAC installation and or service work.”

    Mike Steel

  • THANK YOU Guaranteed Service. You guys are amazing!!!!!!

    “WOW!!! What a great service and very pleasant staff to work with. To begin with, when you call them - Lauren is a pleasant person to speak with. Then our service technician Ricardo was amazing to work with. He first inspected the multiple jobs we had to get done, then explained everything to me, along with approx costing. Then he performed the work to our complete satisfaction and in a timely manner. I could not have asked for a better service. THANK YOU Guaranteed Service. You guys are amazing!!!!!!”

  • He was informative, very personable and we felt very at ease in his company.

    “Justin Ebner was an excellent technician. If you had 10 stars he would get it. He was informative, very personable and we felt very at ease in his company. I will share this experience with family and friends, Mrs. Spinelli”

    Alba Spinelli

  • I highly recommend them for any/all of your air conditioning and heating needs.

    “I'd like to thank Helmi and the entire staff from Guaranteed Service for their professionalism, courtesy and flawless workmanship for the installation of my new AMANA 16 SEER air conditioning and heating system. Their installation crew were neat, thorough and very polite (Tommy is the man). I highly recommend them for any/all of your air conditioning and heating needs. I will make it a point to let all of my neighbors and friends in Knob Hill (Manalapan), that they must use Guaranteed Service, b/c you're guaranteed great service. Thanks again...”

    Thomas Healey

  • He was courteous and took the time to walk me through the issue.

    “Justin Ebner was the technician that came to my house when I had water leaking from the AC unit. He was courteous and took the time to walk me through the issue. He was very thorough, answered all my questions. I felt very comfortable that the issue was appropriately identified and the appropriate corrective action was taken.”

    Vex Axel

  • Job well done for a fair price.

    “Helmi and the installation crew did fantastic job. Helmi was the BEST, he spend time with me explaining the details of my heating and AC system. George and Mark did an excellent job installing my AC system. Job well done for a fair price.”

    Trizonna Coco

  • Stellar work, professional and courteous technicians and a reasonable price.

    “Installed two new AC/furnace units in one day! Stellar work, professional and courteous technicians and a reasonable price. Well done!”

    Marc Eliott Warner

  • They came out in less than an hour and solved the issue right away.

    “Wow impressive!!!!! I called late this Sunday night. With a clog. I expected to book a Monday appointment. They came out in less than an hour and solved the issue right away. Everything went perfect and no more problem. Adam is great. I appreciate the prompt service call.”

    Joe Esposito

  • Same day service with a smile.

    “Same day service with a smile. Great company to work with, Travis was the plumber and he was exceptional, arrived on time and fixed the problem quickly and efficient. Great attitude and great job.”

    Sirr0undCS Sirr0undCS

  • Thanks a lot! I will be very happy to recommend your company to my friends.

    “I bought the Amana AC system with installation from Guaranteed Service last week. Helmi was great company representative, he spend time with me explaining the details with AC system. Justin Ebner, Robert Smith and John Otool are very good engineer with AC installation. Job well done for a fair price. Thanks a lot! I will be very happy to recommend your company to my friends if they need to buy new AC with installation.”

    Robert Zheng