Guaranteed Service
• Certified Best Pick • Certified Best Pick
Best Pick Reports

Guaranteed Service

Air Conditioning & Heating

Certified Pro
732-481-0558
Licensed & Insured
Background checked
1st year as a Best Pick

Hours of Operation

MondayOpen 24 hours
TuesdayOpen 24 hours
WednesdayOpen 24 hours
ThursdayOpen 24 hours
FridayOpen 24 hours
SaturdayOpen 24 hours
SundayOpen 24 hours

Business Address

2675 NJ-70

Manasquan, NJ 08736

Company Details

Services Offered

  • Air cleaners
  • Air duct cleaning
  • Boilers
  • Commercial HVAC services
  • Dehumidifiers
  • Ductless mini-split installation
  • Furnace maintenance
  • Furnace repair, installation, and replacement
  • HVAC system repair, installation, and replacement
  • Heat pump repair, installation, and replacement
  • Humidifiers
  • Indoor air quality solutions
  • Maintenance programs
  • Thermostat installation, repair, and replacement

Services Not Offered

The company does not service portable or window AC units or PTAC units. It does not service or maintain oil heating units.

Minimum Job

Not specified

Warranty

Not specified

Additional Information

The company installs Daikin HVAC equipment and Generac generators.

Employee Information

  • Drive marked vehicles
  • Wear uniforms
  • Wear shoe covers
  • Undergo background checks
  • Undergo drug testing

Insurance Coverage

General Liability Insurance

Workers' Compensation Insurance

Company History

The local company was established in 1989.

Distinctions

  • BBB Accredited
  • Partner of the New Jersey Devils and NJ 101.5
  • Maintains top-rated Google reviews

Customer Benefits

Free Estimates

Satisfaction Guarantee

Customer satisfaction guaranteed

About this company

"At Guaranteed Service, we believe trust is earned through action. That's why our highly trained technicians are available 24/7/365 to protect your comfort, safety, and peace of mind. We don't just complete jobs, we build lasting relationships. You will become a customer for life guaranteed."

— Helmi Ben Flah, Owner

License

19HC00726100

Ratings & Reviews

Compiled Score:

Guaranteed Service has received 4.8 out of 5 stars based on 2722 customer reviews. Learn about Our Research Process.

5
2570
4
43
3
13
2
7
1
89
Jonathan Santiago

Jonathan Santiago

a month ago

I rarely leave negative reviews, but after spending nearly $3,700 with Guaranteed Service, I feel people deserve to know about my experience. I originally called on Wednesday because my AC wasn't cooling properly. I was told a technician could come Thursday between 8:00 AM and 12:00 PM. One night without AC wasn't ideal, but manageable—even with five kids, including two who are only 4 and 8 years old. The technician arrived Thursday, diagnosed the issue, and recommended a repair costing almost $4,000. After completing the work, he assured me the house would begin cooling within a few hours. It never did. When I called the office, I was told they couldn't send anyone back until Saturday because they were too busy and didn't have available technicians. That left me wondering: what exactly is "Guaranteed" about Guaranteed Service? I paid thousands of dollars, but my AC still wasn't working. I was told I'd be placed on an emergency cancellation list for Friday. No one ever came or even contacted me. On Saturday, another technician arrived and immediately questioned the previous repair. He showed me the photos from Thursday and explained the first technician had not added enough refrigerant. According to him, the invoice even stated the system was overcharged when, in reality, it was undercharged. He added refrigerant, and I finally thought we'd get some relief. Unfortunately, that didn't solve the problem either. By Saturday night, the temperature in my house never dropped below 72°—it actually climbed to 76°, even though the outdoor temperature had fallen to around 82°. Sunday morning I went outside and found the refrigerant lines and the brand-new valve they had just repaired completely frozen. When I called again, I was told the earliest another technician could come was Monday afternoon. At this point, I'm left asking: - How many days of work am I supposed to miss? - How many technicians does it take to correctly diagnose one AC system? - Where is the urgency after charging someone nearly $4,000 and leaving them without working air conditioning during a heat emergency? I was seriously considering becoming a Guaranteed Service member because of the benefits they described, but this experience has completely changed my opinion. I don't question that the technicians are trying, but the lack of quality control, follow-up, urgency, and accountability has destroyed my confidence in this company. When customers spend this kind of money, they shouldn't have to wait days between visits while living in an unsafe, uncomfortable home. I expected guaranteed service. Instead, I've received repeated delays, conflicting diagnoses, and an AC that still doesn't work. I guess lets see what the techs say on Monday. I will edit this based on my experience.

Verified Google Review
Mlchelle Conklin

Mlchelle Conklin

2 months ago

I called Guaranteed Service to fix a leaky water line for my toilet. They sent me a photo of the technician and let me know when he was on his way. Eric was great. He knew exactly what needed to be done, and fixed the problem perfectly. He applied a $50 coupon without me even asking, and the final price was $128 less than their competitor's quote. Eric was a pleasure to deal with. I highly recommend Guaranteed Service and would call them again. Before and after photos below.

Verified Google Review
LeReese Davis-Colley

LeReese Davis-Colley

3 months ago

Josh came to my home and did a complimentary AC service. He showed me so much regarding my ac unit. He was very thorough. He showed me how I could get a plan and save money. I ended up getting a plan and Josh took care of the ac unit and took care of my humidifier unit as well. Perfect.

Verified Google Review
Dustin Hinklein

Dustin Hinklein

7 months ago

Shaun and Lou were great. Great customer service and work ethic. Got the job done quick with no issues. Highly recommend for your electrical needs. Had to have a new line ran from the box to the water heater, and have the water heater disconnect installed.

Verified Google Review
Katie Soriano

Katie Soriano

2 months ago

We are really happy with guaranteed services. They were able to schedule us rather quick (within 24 hours) to fix power to our outlets. Nick was really informative, kind and efficient. He was super knowledgeable and was happy to answer any questions we had, as well as repeat himself when I didn’t quite understand things the first time around.

Verified Google Review

Service Area

Guaranteed Service serves 178 cities in the New Jersey area.

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Cities Served

Adelphia, Allenhurst, Allentown, Allenwood, Asbury Park, Atlantic Highlands, Avenel, Avon By The Sea, Basking Ridge, Bedminster, Belford, Belle Mead, Belmar, Berkeley Heights, Bernardsville, Beverly, Bordentown, Bound Brook, Bradley Beach, Brick, Bridgewater, Brielle, Burlington, Carteret, Chesterfield, Clark, Cliffwood, Colonia, Colts Neck, Columbus, Cranbury, Cranford, Cream Ridge, Dayton, Deal, Dunellen, East Brunswick, Eatontown, Edison, Elizabeth, Englishtown, Fair Haven, Fanwood, Far Hills, Farmingdale, Flagtown, Florence, Fords, Fort Monmouth, Franklin Park, Freehold, Garwood, Gladstone, Hainesport, Hazlet, Helmetta, Highland Park, Highlands, Hightstown, Hillsborough, Hillside, Holmdel, Hopewell, Howell, Imlaystown, Iselin, Jackson, Jobstown, Joint Base Mdl, Juliustown, Keansburg, Keasbey, Kendall Park, Kenilworth, Keyport, Kingston, Lakehurst, Lakewood, Lavallette, Lawrence Township, Leonardo, Lincroft, Linden, Little Silver, Long Branch, Lumberton, Lyons, Manasquan, Manchester Township, Mantoloking, Manville, Maple Shade, Marlboro, Marlton, Martinsville, Matawan, Medford, Metuchen, Middlesex, Middletown, Millstone Township, Milltown, Monmouth Beach, Monmouth Junction, Monroe Township, Moorestown, Morganville, Mount Holly, Mount Laurel, Mountainside, Navesink, Neptune, Neshanic Station, New Brunswick, New Egypt, New Providence, North Brunswick, Oakhurst, Ocean Grove, Oceanport, Old Bridge, Palmyra, Parlin, Peapack, Pennington, Perth Amboy, Piscataway, Plainfield, Plainsboro, Point Pleasant Beach, Port Monmouth, Port Reading, Princeton, Princeton Junction, Rahway, Rancocas, Raritan, Red Bank, Riverside, Riverton, Rocky Hill, Roebling, Roosevelt, Roselle, Roselle Park, Rumson, Sayreville, Scotch Plains, Sea Girt, Seaside Heights, Sewaren, Shrewsbury, Skillman, Somerset, Somerville, South Amboy, South Bound Brook, South Plainfield, South River, Spotswood, Spring Lake, Springfield, Summit, Tennent, Toms River, Trenton, Union, Vauxhall, Vincentown, Warren, Watchung, West Long Branch, Westfield, Wickatunk, Willingboro, Windsor, Woodbridge, Zarephath

Guaranteed Service FAQ

Guaranteed Service offers comprehensive HVAC solutions, providing repair, installation, and replacement for furnaces, heat pumps, HVAC systems, and thermostats, alongside ductless mini-split installation, boiler services, and commercial HVAC. They also specialize in indoor air quality solutions, including air cleaners, humidifiers, dehumidifiers, and air duct cleaning, plus general maintenance services. Please note that Guaranteed Service does not service portable or window AC units, PTAC units, or oil heating units.

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