AC Services

Air Conditioning Problems Solved Across Silicon Valley

Is your AC blowing warm air, running nonstop but never cooling the house, or costing you more in power bills every month? These aren’t just annoyances—they’re warning signs that something serious is going on with your air conditioning, and it’s not the kind of thing you can fix by fiddling with the thermostat. Plum HVAC handles these calls every day across Silicon Valley, and we’re ready to get your system back on track—just reach out.

AC Installation & Replacement

When repairs start stacking up or your old unit just can’t keep the house cool anymore, it’s time to talk about replacement—not another band-aid fix.

We see the full spectrum: systems from the 90s running on borrowed time, units that were sized wrong for the house from day one, or installations by “budget” contractors that cut corners. If your AC is making grinding noises, short-cycling, or leaving rooms hot and humid, the underlying problem is often age, poor airflow, or mismatched equipment. We’ll tell you straight if a repair makes sense, but sometimes you’re just sinking money into a lost cause.

Common signs you need a new AC:

- Uneven cooling or hot spots in the house - Compressor is loud, rattling, or struggling to start - Cooling bills keep climbing every summer - Your system’s pushing 15+ years or uses R-22 refrigerant - Multiple repairs in the last two years

When you’re ready for a new system, here’s what actually matters: proper load calculation (not just copying the old unit’s size), correct ductwork sizing, and a clean, tight install—no refrigerant leaks, no loose wiring, no airflow shortcuts. We handle the removal, disposal, and full commissioning of your new unit, walking you through every decision. You’ll often hear about AC Maintenance & Tune-Up at this stage—pairing a new install with a maintenance plan is the best way to protect your investment.

Looking for a full system upgrade? Explore our complete AC Installation & Replacement coverage to see how we approach planned upgrades.

AC Maintenance & Tune-Up

A yearly tune-up can mean the difference between a summer of smooth cooling and a mid-July breakdown, but a lot of homeowners skip it—usually because they’ve never seen a tech actually do it right.

We don’t just swap the filter and dash. Our tune-ups catch the problems that turn into big repair bills if ignored: clogged condensate drains, low refrigerant charge, seized fan motors, and pitted contactors. Most “no-cool” calls we get in peak season? They could have been prevented with a real tune-up, not just a checkbox inspection.

What we check on every maintenance call:

- Clean condenser and evaporator coils (not just a quick rinse) - Inspect and tighten all wiring connections - Test capacitor and relay health - Check refrigerant pressures and temperatures - Clear and treat condensate lines for clogs or algae - Lubricate moving parts where applicable - Check for duct leaks and airflow issues

We’ll show you exactly what we find—no scare tactics, no upsell pressure. If we spot something that could turn into a repair, you’ll get a clear explanation and options. Many customers who start with maintenance end up asking about AC Inspection & Testing when their equipment shows signs of bigger issues.

Lock in proactive care with our AC Maintenance & Tune-Up program.

AC Inspection & Testing

If your AC never seems to cool the house evenly, keeps tripping breakers, or leaves you guessing about its next breakdown, an inspection is the only way to get real answers.

We run a full diagnostic—not just a quick look at the thermostat. That means checking airflow at each register, measuring supply and return temperatures, and using electronic leak detectors to find hidden refrigerant leaks. We see a lot of misdiagnosed problems in Silicon Valley: what sounds like a bad compressor sometimes turns out to be a simple thermostat miswire or a duct leak in the attic. AC Installation & Replacement is the right move when inspections reveal a system that’s undersized, but we’ll always walk you through the numbers before making that call.

Our inspection process covers:

- Visual inspection of indoor and outdoor units - Full system amp draw and voltage checks - Duct integrity and insulation review - Static pressure measurement for airflow problems - Refrigerant leak detection (electronic and bubble test) - Thermostat calibration and function test - Safety switches and drain pan condition

After testing, we give you a plain-English report—what’s working, what’s risky, and what’s urgent. If we catch a failing part early, a follow-up AC Maintenance & Tune-Up can often extend your system’s life.

Compare your equipment against our AC Inspection & Testing checklist before peak season.

How We Work

We don’t just show up, swap a part, and disappear. Every call starts with a real diagnosis—no guessing, no parts cannon, no pressure to replace if a repair will do the trick. Our techs are licensed, seasoned, and straight with you about what your system needs and why.

We treat your home like it’s our own. Drop cloths, shoe covers, and a clean workspace are standard, not “extras.” When we finish, you’ll get a clear rundown of what was done, what to watch for, and honest answers to your questions. That transparency is why so many Silicon Valley homeowners stick with Plum HVAC for AC, Heat Pumps, and more.

You’ll never get a “one size fits all” answer here. We tailor every service—whether it’s AC Installation & Replacement or a simple tune-up—to fit your home’s needs, not just the symptoms you called about.

Related Services

Air conditioning is just the start. If you’re looking for a system that heats and cools with high efficiency, explore our Heat Pump Installation & Replacement solutions. Want to tackle specific comfort challenges in a single room or addition? Check out our Ductless Installation & Replacement options for flexible zoning and easy retrofits. And if allergies or air quality are a concern, our Indoor Air Quality Installation & Replacement services can make a huge difference in the air your family breathes.

Ready for Real Relief?

Don’t let another day go by with an air conditioner that’s failing, noisy, or costing you a fortune. Take back control of your home’s comfort—contact Plum HVAC and let’s get your system working the way it should.