How a Broken AC Affects Your Electricity Bill in San Jose

A malfunctioning AC can quietly become one of the biggest contributors to higher energy bills, especially in the Bay Area, where utility rates are high and summer temperatures often reach around 82°F, with frequent spikes into the 90s. The connection is simple: when your AC isn’t working efficiently, it uses more energy to do its job. That extra energy use directly impacts the kilowatt-hours (kWh) shown on your bill.

In this blog, we’ll explain how a broken AC can cause higher electricity bills, identify the most common reasons behind rising costs, and share what homeowners can do to prevent the problem from worsening.

If you notice signs of AC trouble, IRBIS Air, Plumbing & Electrical can help. As a trusted local HVAC company, we provide fast, thorough inspections, professional repairs, and long-term efficiency solutions. Call (669) 322-8182 or complete our online form to schedule service.

Why a Struggling AC Means Higher Energy Bills

An air conditioner’s main job is to pull heat out of your home and push it outside, keeping your indoor space cool and comfortable. When your system works properly, it does this with minimal electricity. But when parts break down—due to dirt, wear, or technical issues—the system has to work harder for longer periods to keep the temperature steady.

That means “working harder, not smarter.” Instead of cycling efficiently on and off, a struggling AC might run continuously or short-cycle repeatedly. In either case, it uses more power than necessary.

To understand how this impacts your electricity bill, consider this: the standard unit of measurement for electricity is the kilowatt-hour (kWh), which indicates how much energy your household uses. When your AC’s efficiency decreases, kWh consumption increases. And with high electricity prices, even a small rise in energy use can raise your monthly bill.

Common AC Issues That Can Spike Your Electricity Bill

Even small AC malfunctions can quietly drive up energy costs.

Common problems that impact system efficiency and cause your utility bill to climb include the following:

• Dirty air filters – Airflow is restricted when air filters are clogged with dust and debris. This restriction causes the blower motor to work harder and longer, which reduces heat transfer efficiency and increases energy use. Solution: Replace filters every 1–3 months, especially during peak cooling seasons.
• Low refrigerant levels (leaks) – Refrigerant absorbs heat from inside your home. When levels are low—usually due to a leak—your system can’t cool effectively. The compressor ends up running for extended periods, wasting electricity. Solution: Have an HVAC technician detect and repair leaks, then recharge the system with the correct refrigerant level.
• Dirty coils (evaporator and condenser) – When coils become coated in grime, they lose their ability to release or absorb heat efficiently. As a result, your compressor works harder, and energy use increases. Solution: Schedule routine professional maintenance to keep coils clean and fully functional.
• Leaky ductwork – If your ducts have holes or poor seals, cooled air escapes into attics, basements, or crawl spaces. The system then runs longer to compensate for lost air, adding strain and energy consumption. Solution: Have your ducts inspected and sealed or repaired by a professional.
• Faulty thermostat – An inaccurate thermostat can misread the room temperature, causing the AC to run more often than necessary, or not enough. Inconsistent cycling burns energy and reduces comfort. Solution: Calibrate or replace the thermostat. Consider upgrading to a smart thermostat for better control and energy savings.
• Aging or improperly sized unit – Older systems naturally degrade in performance, and outdated technology is typically less energy-efficient. An AC unit that’s too large or too small for your home will cycle improperly, leading to unnecessary energy use. Solution: Have an HVAC technician assess your system. If needed, upgrade to a properly sized, energy-efficient model.

Take Control of Your Cooling Costs

A broken AC isn’t just uncomfortable—it’s expensive. In San Jose, where summer heat and high electricity rates collide, small inefficiencies can strain your monthly budget. But you don’t have to let cooling costs spiral out of control.

By addressing minor issues before they escalate, you can protect your system, stay comfortable, and keep your electricity bill in check. Whether it’s a quick repair, preventive maintenance, or a complete system evaluation, IRBIS Air, Plumbing & Electrical is a trusted partner for efficient, reliable HVAC service.

Call us at (669) 322-8182 or reach out through our online form to schedule an AC inspection or service appointment. Let’s keep your home cool and your energy bills under control.