HVAC, Electrical, & Plumbing Services in Princeton, NJ

Princeton, NJ homeowners rely on Guaranteed Service as their dependable HVAC company. From the historic homes near Princeton University to newer builds across Mercer County, we keep your home comfortable and running smoothly all year.



We offer air conditioning, heating, electrical, and plumbing services. We provide same-day service and honest, upfront pricing for every job. One call covers all four systems, so you never have to juggle multiple contractors to keep your home in good shape.

Air Conditioning Services

Princeton summers bring heat and sticky humidity that central New Jersey is known for. When your air conditioner quits on a 90-degree afternoon, our team delivers fast AC repair to get cool air flowing again. We service every major brand and system type, from central air to ductless mini-splits.

Our AC services cover more than emergency fixes:

• AC repair for weak airflow, warm air, strange noises, and units that won't turn on
• AC installation and replacement, sized correctly for your home so you don't pay for wasted energy
• AC tune-up service that keeps your system efficient and helps prevent breakdowns when you need cooling most

Central air conditioners usually last 12 to 17 years, and ductless mini-splits run about 10 to 15 years. If your system is near that range and needs frequent repairs, we'll walk you through honest options for repair or replacement so you can pick what fits your budget. We'll also check your ductwork and refrigerant levels during the visit, since small issues are a common reason a Princeton home never quite cools the way it should.

Heating Services

When a cold snap or a nor'easter rolls through Princeton, a reliable heating system is not optional. Our heating services keep your home warm through the coldest Mercer County nights, whether you rely on a furnace, boiler, or heat pump.

We handle the full range of heating needs:

• Furnace repair for no-heat calls, short cycling, odd smells, and rising energy bills
• Furnace installation and heating system replacement when an older unit is past its prime
• Furnace tune-up service to catch small problems early and keep your heat running safely all winter

A well-maintained furnace often lasts 15 to 20 years, boilers can run 15 to 25 years, and heat pumps about 10 to 15 years. If your equipment is aging or struggling to keep up, our technicians will explain where it stands and what your best next step is, with no pressure. A fall tune-up is one of the easiest ways to avoid a no-heat call in January, and it helps your system run safely by checking for issues like a cracked heat exchanger or a clogged burner.

Electrical Services

Many homes in Princeton were built decades ago, and older wiring and panels often can’t keep up with the demands of modern living. Our licensed electricians provide safe, code-compliant electrical services that protect your home and family.

We focus on the electrical work homeowners need most:

• Electrical panel repair for breakers that trip often, flickering lights, or a panel that feels warm to the touch
• Electrical panel replacement and upgrades to add capacity for EV chargers, additions, and today's appliances
• Electrical repair for outlets, switches, wiring, and other everyday issues

If your panel is outdated or you plan a home upgrade, we’ll inspect your system. We’ll recommend an electrical panel repair or a full replacement as the safer, smarter choice. Because a panel upgrade has to be done by a certified electrician, we'll handle the inspection, permitting, and code compliance for you. In older Princeton homes, we often find small panels or old wiring that can't handle modern power needs. We will flag any hazard we see. This lets you fix it before it becomes a problem.

Plumbing Services

From slow drains to a water heater that quits on a winter morning, plumbing problems never come at a good time. Our plumbing services keep water moving where it should and stop small leaks from turning into big repairs.

Our plumbers handle a wide range of jobs:

• Drain cleaning to clear clogged sinks, tubs, and main lines, plus tips to keep them flowing
• Pipe repair for leaks, low water pressure, and aging pipes common in older Princeton homes
• Water heater repair and water heater replacement for both tank and tankless systems

Most water heaters last 8 to 12 years, and central New Jersey's hard water can shorten that lifespan. If yours is showing its age, we'll help you decide between a repair and a new, more efficient unit.

What Sets Guaranteed Service Apart

Plenty of companies say they show up. We back it up with our Same-Day Service Guarantee, so when we say today, we mean today. Here's what you can expect every time you call:

• Same-day service for repairs, so you're not waiting days without cooling, heat, or hot water
• 24/7 emergency service, with a live person answering your call any hour, any day
• Upfront pricing, where you approve the cost before we start and never face surprise charges

When you book with us, you get a real appointment window, not an all-day wait, plus our promise to make it right or you don't pay. Our HVAC repair and HVAC installation services have the backing of hundreds of five-star reviews from Princeton, NJ homeowners.

It's the kind of dependable, no-surprises service that has kept Princeton homeowners calling us back for over 20 years. Ask about our maintenance plan, too, which bundles seasonal tune-ups and priority scheduling to help you avoid breakdowns and get to the front of the line when you need us most.

Princeton, NJ HVAC FAQs

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Fixing Up Your Home Doesn't Have to Break the Bank

We offer efficient and affordable home service in New Jersey