California Heat Waves Don’t Stand a Chance

AC Services

Every house cools differently. We'll figure out yours.

Cooling, Handled

Reliable AC Services in Simi Valley & Ventura County

Summers here run long and hot, and an air conditioner in the valley logs far more hours than the same unit would almost anywhere else. That shows up eventually, usually on the hottest afternoon of the year.

Dutton Plumbing, Cooling, Heating & Electrical repairs, installs, and maintains air conditioning systems across Simi Valley, Ventura County, the San Fernando Valley, Santa Clarita, and Northern LA County. We’ve worked on homes in this area since 1987, and every visit is priced by the job, so you know the cost before anything starts.

AC not keeping up? Let’s find out why.

Pick What You Need

Air Conditioning Services We Offer in Simi Valley & Beyond

We work on central air, ductless mini-splits, and heat pumps, and our technicians service all major brands regardless of who installed the system.

An Update on Efficiency Ratings in CA

What SEER2 Rating Does a California Home Need?

If you’re shopping for a new system, you’ll see different efficiency numbers quoted, and knowing the difference saves you from comparing the wrong things.

In 2023, the Department of Energy changed how efficiency is tested, using conditions closer to those in a real installation with actual ductwork attached. The equipment didn’t change. The test did. A SEER2 number runs roughly five percent lower than the old SEER number for the exact same unit.

California falls in the DOE’s Southwest region, which carries stricter cooling requirements than most of the country because of how hard systems work here. For most residential split systems under 45,000 BTU, 14.3 SEER2 is the legal floor for new installations. That’s the equivalent of the old 15 SEER rating.

Where it makes sense to go above the minimum depends on how long you plan to stay in the house and how much you run the system. In a valley that runs the AC five or six months a year, that math works out differently than it would in a milder climate.

We size to California’s efficiency standards on every job, which means SEER2 isn’t a number we have to look up.

Not Every House Cools the Same Way

Why Cooling Problems Look Different From House to House in Ventura County

Homes in this area were built across a wide span of decades, and what works in one doesn't always work next door.

Older homes weren't built around central air.

Plenty of houses here were designed before central AC was standard, and the ductwork was added later or sized for a smaller load than the house now carries. That's why some homes never cool evenly, no matter how hard the system runs.

Additions rarely got added to the system.

A converted garage, a bonus room, a permitted addition. These frequently end up on the original system without being resized, leaving those rooms warm while the rest of the house works harder to compensate.

Upstairs and west-facing rooms carry more load.

Heat rises, and afternoon sun on a west-facing wall does the rest. A system sized on square footage alone tends to fall short in exactly those rooms, which is the most common complaint we hear that isn't actually a malfunction.

What Sets Us Apart

Why Simi Valley Homeowners Call Dutton for AC

We Run the Numbers Before Recommending a System

Sizing gets based on a load calculation, not on square footage or on whatever unit is easiest to move. An oversized system short cycles and wears out faster. An undersized one never catches up. Getting it right the first time is what determines how long the system lasts.

No Surprises on the Invoice

The price you're quoted is the price you pay, whether the AC needs a five-minute fix or a complete overhaul. We quote by the job, not by the hour, and nothing gets added without your consent.

We'll Say When a Repair Is the Better Option

A system with a lot of life left and a straightforward issue is worth repairing, and we'll tell you so. Replacement is recommended when the numbers point to it, not because it's the larger job.

A technician reaching for a roof ladder on top of a service van from the open rear in a suburban home driveway.

AC Questions, Answered

FAQs on Air Conditioner Repairs & More

How long does an air conditioner last?

Fifteen to twenty years with regular maintenance is typical. Systems in this area of California often land at the lower end of that, since they run more hours per year than the same unit would in a milder climate.

How often should an AC system be serviced?

Once a year, ideally in spring before the first stretch of real heat. An annual tune-up catches worn parts and low refrigerant while they’re still small problems rather than a no-cool call in August. Dutton Deluxe members get one included every year, along with a heating tune-up, so it’s already scheduled instead of something to remember.

Should I repair or replace my AC?

Age and the specific failure generally decide this. A capacitor or contactor on a newer system is almost always worth repairing. A major failure on a system past twelve to fifteen years usually isn't, especially if it still runs on older refrigerant. We'll walk you through where yours falls.

What's the difference between central air and a ductless mini-split?

Central air cools the whole house through one system and a network of ducts. A ductless mini-split cools individual rooms or zones directly, with no ductwork required, which makes it a practical fit for additions, converted garages, or any room the main system never quite reaches. Central air is usually the better choice for cooling an entire house at once; ductless tends to win for targeted problem spots.

Why are some rooms in my house always warmer than others?

Ductwork, insulation, or sun exposure are usually the causes here. Upstairs rooms, spaces above a garage, and west-facing rooms all carry more heat load than square footage alone would suggest. A ductless mini-split is often the practical fix for one stubborn room.

Can you repair my AC the same day I call?

Often, yes, particularly for common failures like capacitors and contactors. More involved repairs sometimes need a part that isn't standard truck stock, and we'll tell you that up front.

Ready When You Are

Let's Get Your Home's Ducks in a Row

An AC that’s already struggling in June isn’t going to improve on its own by August. Tell us what yours is doing, and we’ll figure out whether it needs a repair, a tune-up, or something bigger.