(609) 799-3434

Generator Repair That Restores Reliable Backup Power

A standby generator that fails to start during an outage defeats the purpose of having one.

Your standby generator sits waiting to protect your home when the power goes out, and when it fails to start or runs poorly you learn about the problem at the worst possible moment.

Princeton Air provides generator repair throughout New Jersey, with licensed electricians who understand standby systems and test them under real conditions. Call Princeton Air or schedule online today.


Emergency Generator Repair Available 24/7

A generator that’s down during an active outage is a real emergency.

Princeton Air answers emergency generator calls around the clock. A standby unit that won’t start during an active outage is the exact failure mode the equipment exists to prevent, which is why this call is treated as a real emergency. Call or submit your service request online, and we will dispatch a licensed electrician quickly to restore backup power.

(609) 799-3434

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Generator Expertise Including Generac Service

Generator service calls for an electrician who knows the specific equipment, especially if you have a Generac system.

Princeton Air has serviced residential standby generators in Hamilton Township and the greater Princeton, New Jersey area for years, including the Generac systems that dominate the residential standby market. Our licensed electricians work on Generac, Kohler, Cummins, and Briggs & Stratton standby generators across the capacity range from 7 kilowatts through 26-plus kilowatts.

Years in Business

Skilled employees

Emergency Service

Trucks on the Road

How Your Generator Repair Visit Works

Generator service should be thorough because the equipment is only worth what it delivers during an outage.

A generator visit covers the engine, the electrical components, the automatic transfer switch, and the controls, with a live-load test at the end to confirm the system actually responds during a real outage.

You phone us or submit service online. Our team collects specifics about your generator (brand, approximate age, what symptoms you’re experiencing, whether the unit is under warranty) and confirms an appointment.

Your licensed electrician inspects the generator’s engine, electrical components, automatic transfer switch, and controls. You receive a written quote laying out the repair scope before the electrician starts the work.

Your electrician completes the repair and runs the generator through a full test cycle, including automatic transfer switch operation, to verify the system actually responds correctly to a real outage condition.

(609) 799-3434

What Our Customers Are Saying

100% Satisfaction Guarantee

4.7
Based on 6447 reviews
Our Tech Dominic was Awesome!! Thank you so much!!
On time. Completed work on all units … Heater, air conditioner, and hot water heater … Within the time frame.
After a few mishaps, Princeton Air came through and got my AC system running when the temperatures are soaring.

Thanks to Will and my technician, Alberto, for getting everything fixed.
Responsive, knowledgeable, dependable, & honest. Thank you for getting out heat up & running!

Update:10/12/18
Chris S got the heat last year and remembered when he arrived today, asked if it had a problem since. He came back to do a PM on the heater and while he was waiting for me to arrive, he opened up the air conditioner to inspect it and saw the coils were filthy. Took out his hose and cleaned them. Then when done, did the heater PM and then โ€œsaid I just want to verify that ringing noise went away. Your house will cool much faster now!โ€ I really like what Princeton air offers, quality and care, diagnose and fix. Not rushing to get to the next job. Theyโ€™re so good I got the year round service plan.

Update may 2025&2026
Maurice is fantastic.
Prompt and knowledgeable. Great technician.
There was an urgent need for a mold problem to be handled in a bathroom. They quickly identified the problem, tested the seriousness, and took care of it – in a very timely fashion. They communicated with me all along the way so I could fully comprehend what was going on. All the people were very knowledgeable, pleasant and accommodating. My experience with them was excellent, and I would highly recommend them.
Eric M. was prompt, professional, courteous and quite helpful. I become a better consumer when I understand the problem & possible solutions. Eric was willing to answer my questions and made me feel secure that he would follow up to help fix our problem.

New review: 2/6/2018
Notice a problem with the humidity in my home, called and got a service appointment in the same day. Will D came out and sure enough, confirmed there was a problem, explained what exactly was happening, why it was happening and how to check that it was working correctly. His demeanor was pleasant, he was professional and seemed to be quite knowledge!
Great service. Domenic was so helpful and explained everything done.
Jermaine Richmond was very knowledgeable and explained my plumbing issue throughly. Thank you.
Pretty micron air was quick to fix my sewer
Friendly and efficient. Quick response service
Eric did a fantastic job
Installation of water heater hvac and furnace – very professional and process oriented –
The technician who came was Jonathan Redondo. He was very knowledgeable and did an excellent job! I would highly recommend him .
Christian and Mike were professional, thorough, patient, and kind throughout my heating boiler installation.
Always excellent service with McAllister.
Robert came to check my 2 carbon monoxide detectors, which were very old. I decided to have him go ahead and replace them with smoke detector/ carbon monoxide combination units. He was very polite and efficient .
Jihmy and Asterson did an outstanding job and were extremely professional during a recent installation of a mini split and air handler. They communicated well, kept the house clean and did the job with a level of professionalism and expertise that was refreshing.
Good job
Maurice Gaines who cleaned and serviced my air conditioner was fantastic! He was fast, respectful and very fast with the repairs.

He made me feel like I was getting the full respect and honesty I so needed for something so important and really appreciated the time he took to explain every and answer all my millions of questions. Also Princeton Air communications were fast and accurate , leaving no question unanswered as to timing and confirmation of appointment. Iโ€™m so happy with their staff and with Maurice- heโ€™s a gem!
Thank you!
The young man who came out to fulfill our annual service contract was extremely professional and was very thorough. Although he told us we needed a new ac unit I felt confident that he knew what he was talking about and took the right amount of time in order to make his recommendation. I want him back every year. Unfortunately I forgot his name because Iโ€™m old.

He then had Ricky call us with replacement ac unit recommendations. He was just as professional. He then took the time to visit our condo, take measurements himself and then made recommendations on what size unit to purchase. I really feel he saved us money. He was amazing.

We then were contacted by a gentleman named Steve who was a manager in the service and installation department. Itโ€™s hard to believe but he was just as good as the first two representatives and was an absolute pleasure to work with. He was a true professional and a real asset to your organization. I will always use your company if I can work with this team. Keep up the great work. Thanks for allowing me to spend $8,000.its hard to believe I didnโ€™t even get other quotes because I was so happy with your team.
Water purification system
Recently Princeton Air did a routine maintenance check on our HVAC UNIT. The technician was Dominic McGinley. I must say Mr. McGinley was outstanding. After performing the maintenance and evaluation, he sat down with us and explained his findings in precise detail. He has also taken pictures of everything he found. Dominic was a pleasure with whom to interact. He was professional, friendly, and extremely knowledgeable. He explained everything in terms that we could definitely understand. He is one of the finest technicians that has ever performed preventative maintenance on our equipment. In my estimation he has all of attributes of a first rate Service Technician. Hopefully Princeton Air just what a valuable asset he is for the company. I certainly hope to interact with him many times in the future.
We recently used Princeton Air to install a new heater. They gave us lots of options, explained each one thoroughly, they arrived promptly on installation day and did a great job. The price was the lowest of three companies I contacted for estimates. Five stars!
Always professional and informative.

(609) 799-3434

Generator Problems Our Electricians Handle

Standby generators sit idle for long stretches and then work hard when called upon, which is why they fail in specific ways.

Princeton Air’s licensed electricians have resolved every common standby generator issue that comes up across Mercer County.

You have a power outage and the generator doesn’t crank, or it cranks but won’t run. Starting failures trace to battery issues, fuel supply problems, ignition components, or control module faults. Your electrician diagnoses the specific cause and addresses it so your backup power works when the next outage hits.

You hear the generator running but notice it surging, struggling, or cutting off unexpectedly. Running issues come from fuel quality, air intake restrictions, voltage regulator problems, or engine concerns. Your electrician tests the system under load and identifies what’s driving the instability.

You have a generator that starts but doesn’t actually transfer power to your home, or that transfers and then doesn’t switch back when utility power returns. ATS failures are as important as the generator itself because the switch is how power actually reaches your circuits. Your electrician diagnoses and repairs the transfer switch side of the system.

You see an alarm or fault indication on your generator’s control panel. Generac and other modern generators display specific codes that point to specific conditions (low oil, overspeed, overvoltage, sensor failures, and more). Your electrician interprets the code against the manufacturer’s documentation and performs the correct repair.

You find your generator battery dead, or the unit indicating a weak battery. Batteries fail due to age, trickle charger issues, or parasitic draw from the control module. Your electrician tests the battery and charging system and replaces components as needed.

You notice the generator isn’t running its weekly self-test, or it starts the test and shuts down partway through. Exercise failures point to control module issues, fuel problems, or sensor faults. A generator that doesn’t exercise reliably is a generator you can’t count on during a real outage.

Why Princeton Air for Generator Repair

Standby generator work requires electrical expertise and specific generator knowledge.

Princeton Air has served homeowners throughout Mercer County across decades of electrical work.

Your generator repair is handled by a licensed electrician who services standby generators regularly. The license is the baseline; generator-specific experience is what produces reliable repairs on complex equipment.

Princeton Air services Generac standby generators, which represent the majority of residential standby systems installed throughout New Jersey. Factory-aware service supports warranty claims and keeps your equipment performing to specification.

Your generator service includes live-load testing, because a generator that starts on a technician’s command in clear weather isn’t necessarily one that will handle a real power outage. Testing under actual load conditions verifies the full system.

Your generator connects into your electrical panel, and Princeton Air handles both. When generator issues relate to panel or transfer switch conditions, one company addresses the full picture instead of coordinating between trades.

Older standby generators sometimes reach the point where significant repair investment doesn’t make economic sense compared to a newer unit with modern reliability. Your electrician gives you the real picture on your specific equipment.

(609) 799-3434


(609) 799-3434

Full Generator Services From Princeton Air

Generator repair is one part of a full standby power practice.

Princeton Air’s licensed electricians handle every phase of generator ownership.

When you’re ready to add standby power to your home, you get proper sizing for your load, quality equipment selection, correct transfer switch integration, and permitted installation.

When your existing generator has reached end of life, you receive a clean replacement with appropriate modern equipment and updated integration with your electrical system.

Your annual generator service keeps the unit ready for real duty, covering oil, filters, battery condition, fuel system, and automatic transfer switch testing. Regular service is the single most important factor in whether a standby generator works during an outage.

Beyond generators, Princeton Air handles electrical panels, outlets, switches, lighting, and the full range of residential electrical work.


Protect Your Comfort Year-Round

Generator maintenance is the difference between a generator that works and a generator that doesn’t.

You can stay ahead of unexpected issues through the Princeton Air Home Comfort Club. Membership gives you pre-scheduled maintenance, priority service, and thoughtful system evaluations that catch small concerns before they become repair calls.

You get reduced rates on service work, credits toward future installations, priority scheduling when you need it, and no dispatch fees when work is performed. Membership extends across HVAC, plumbing, and electrical, so the same trusted team looks after every important system in your home.

Ask about joining the Princeton Air Home Comfort Club when you call or schedule online.

Princeton Air Technician


Princeton Air Technician

Call Princeton Air for Generator Repair

Backup power you can rely on the moment the grid goes down is the entire point of a standby generator. Phone Princeton Air or submit your online service request to get a licensed electrician working on your generator.


Frequently Asked Questions

How often does my standby generator need professional service?

Most standby generators need annual professional service to stay ready for real operation. Higher-use units or older equipment can benefit from twice-yearly service. Generac and most other manufacturers specify service intervals in the owner’s manual, and following them is typically a warranty requirement.

Why didn’t my generator start during the last outage?

The most common cause is a battery that failed between outages, followed by fuel supply issues (a closed valve, empty propane tank, or fuel line problem) and exercise failures that went unnoticed. An annual professional service test under load catches most of these conditions before an actual outage.

Should I do my own generator maintenance?

Oil and filter changes are within some owners’ ability, but comprehensive service requires a licensed electrician with generator training. Transfer switch testing, battery diagnostics, fuel system verification, and control module evaluation all require specific expertise. DIY maintenance often misses the most important checks.

How long do standby generators last?

A well-maintained residential standby generator typically runs 20 to 30 years or more. Usage hours affect lifespan significantly, which is why exercise cycles are counted and tracked. Neglected units that miss service intervals often fail far sooner, usually during an actual outage when the failure matters most.

Can you service all standby generator brands?

Yes. Princeton Air’s licensed electricians service the residential standby brands installed throughout New Jersey, including Generac, Kohler, Cummins, Briggs & Stratton, and others. Generac specifically is a significant portion of our generator service volume because of how common the brand is in the region.