If your electric bill suddenly looks higher than expected, your first thought might be, “It’s Texas. It’s August.” And while Central Texas heat absolutely plays a role, a higher electric bill can also be a sign that one or more systems in your home is working harder than it should.
At Lantz Home Services, we look at the whole home instead of automatically blaming the AC. With more than 50 years of combined trade experience, our team works across HVAC, plumbing, and electrical systems, helping homeowners understand what is actually happening before deciding what needs to be repaired or replaced.
Why Are Electric Bills So High in Texas?
Central Texas homeowners have a unique challenge. Our homes can spend months relying heavily on air conditioning, and systems may run for long stretches during periods of extreme heat.
Austin Energy notes that heating and cooling are significant contributors to household energy use, and its current residential programs focus on improving whole-home efficiency through HVAC upgrades, duct sealing, insulation, and other improvements.
Your electric bill also reflects more than the amount of electricity your home consumes. Austin Energy's residential rates include multiple charges, and customers inside and outside the City of Austin can have different billing structures.
That means an unusually high bill does not automatically mean something is broken. However, if your usage has changed significantly without an obvious explanation, it is worth investigating.
Here are 10 home systems and conditions we recommend putting on your radar.
1. Your Air Conditioner
In Central Texas, your AC is often the first place to look when your electric bill jumps.
An air conditioner that runs almost constantly is not necessarily broken. During extreme heat, long run times can be normal. But an AC that suddenly runs much longer than it used to, struggles to reach the thermostat setting, or creates hot and cold spots could have an underlying problem.
Common contributors include:
- Restricted airflow
- Dirty filters
- Refrigerant problems
- Electrical component issues
- Poor ductwork
- Inadequate insulation
- An aging system
- Improper equipment sizing
Lantz technicians look beyond the outdoor condenser when diagnosing high energy use. Airflow, ductwork, insulation, electrical capacity, and equipment condition can all affect how efficiently an HVAC system operates.
2. An Aging HVAC System
Your AC may still be working, but that does not necessarily mean it is operating efficiently.
Older equipment can require more maintenance and may struggle to keep up with Central Texas temperatures. That does not mean every older AC needs to be replaced. A professional evaluation should consider the system's condition, repair history, efficiency, comfort, and expected remaining service life.
This is especially important if your energy bills are climbing while your home's comfort is declining.
A good rule: Do not replace an HVAC system simply because someone tells you it is old. Find out why it is using more energy and whether repair, maintenance, or replacement makes the most sense for your home.
3. Dirty or Incorrectly Installed Air Filters
A filter is simple, but it matters.
When a filter becomes excessively dirty, airflow through the HVAC system can become restricted. Your system may then have to work harder to move conditioned air throughout the house.
The right filter also matters. Installing a filter that is too restrictive for your particular HVAC system can create airflow problems.
Follow the filter replacement schedule recommended for your equipment and household conditions. If you are replacing filters frequently but still experiencing weak airflow or long run times, the filter may not be the whole story.
4. Leaky or Poorly Performing Ductwork
Your AC can be working perfectly while your duct system wastes the conditioned air it is supposed to deliver.
Ducts that run through hot attic spaces can be especially important in Central Texas. Gaps, disconnected sections, poor insulation, and leaks can reduce the amount of conditioned air that actually reaches your living spaces.
The U.S. Department of Energy notes that poorly sealed or insulated duct systems can result in significant energy losses, particularly when ducts travel through unconditioned spaces.
If some rooms are consistently hotter than others, your system runs for long periods, or your energy bills seem unusually high, ductwork and airflow deserve a closer look.
5. Your Electric Water Heater
Your water heater works every day, even when you are not thinking about it.
Electric water heaters use electricity to heat and maintain hot water, so issues such as sediment buildup, aging components, or inefficient operation can affect performance.
Water heating is one of the larger energy expenses in a typical home.
If your hot water seems less consistent, your water heater is making unusual noises, or the system is getting older, a professional plumbing inspection can help determine whether maintenance or replacement is appropriate.
For Austin homeowners considering an upgrade, Austin Energy currently offers incentives for qualifying heat pump water heaters.
6. Pool Equipment
If you have a pool, do not forget about the equipment room when looking for energy consumption.
Pool pumps can run for hours each day, particularly during the warmer months. An inefficient or aging pump may consume more electricity than necessary.
Austin Energy currently offers rebates for qualifying ENERGY STAR variable-speed pool pumps, which reflects the potential energy savings associated with more efficient pool equipment.
If your pool equipment is running constantly, making unusual noises, or nearing the end of its service life, it may be worth having it evaluated.
7. Well Pumps and Lake Pumps
This one is particularly important for homeowners around Lake Travis, Lago Vista, Spicewood, Marble Falls, and other Hill Country communities.
Not every Central Texas home gets its water from the same type of system. Some lake-area and rural properties rely on private wells, lake intake pumps, pressure systems, or other equipment that has to move water into and throughout the home.
A pump that is cycling too frequently, running longer than normal, or struggling to maintain pressure can potentially affect energy use.
Lantz specifically services lake intake pumps and private well systems because these systems are common in communities around Lake Travis and are not actively serviced by every home service company.
If your home depends on a pump system, changes in water pressure or pump behavior are worth paying attention to.
8. Grinder Pumps
Grinder pumps are another specialized system found in many lake-area homes.
A grinder pump uses electricity to move wastewater from a home to the sewer system when gravity drainage is not sufficient. Because it is an electrically powered mechanical system, proper maintenance matters.
A pump that is struggling, cycling unnecessarily, or developing mechanical problems should not be ignored.
Lantz's Ultimate Home Care Plan includes grinder pump inspections that evaluate components such as the tank, valves, discharge line, panel, and pump amp draw.
A grinder pump may not be the first thing you think of when you see a high electric bill, but it is another system that should be considered when troubleshooting unusual energy use in a lake-area home.
9. Electrical Problems
Not every high electric bill is an HVAC or plumbing problem.
Electrical issues can sometimes affect how equipment operates, especially when a home's electrical system has aging components, overloaded circuits, poor connections, or equipment that is not operating correctly.
Warning signs that deserve attention include:
- Frequently tripping breakers
- Flickering lights
- Buzzing or unusual electrical noises
- Warm outlets or switches
- Burning smells
- Equipment that repeatedly loses power
- Unexpected changes in how major appliances operate
Never attempt to diagnose or repair a dangerous electrical condition yourself. Electrical troubleshooting should be handled by a qualified professional who can safely test the system.
Lantz provides electrical troubleshooting and repairs alongside HVAC and plumbing services, allowing our team to look at the relationship between major home systems rather than treating every problem in isolation.
10. Standby Power and Equipment That Runs When You Are Not Thinking About It
Your home uses electricity even when you are not actively using an appliance.
Think about:
- Pool equipment
- Water treatment equipment
- Pumps
- Refrigerators and freezers
- Network equipment
- Security systems
- Smart home equipment
- Chargers
- Backup power equipment
- Outdoor lighting
Individually, some of these loads may be relatively small. Collectively, however, they can contribute to your home's total electricity consumption.
Austin Energy provides customers with tools that can show energy use by day, month, and year, as well as comparisons with previous usage and similar homes. That information can help you determine whether your bill increased because your home used more electricity or because something else changed.
How to Find the Real Cause of a High Electric Bill
Before assuming you need a new AC or another expensive upgrade, start with the basics.
Step 1: Compare Your Usage
Look at your actual kilowatt-hour usage, not just the dollar amount of your bill.
A higher bill can result from increased usage, changes in rates, or both.
Step 2: Look for a Pattern
Did your usage increase during a particularly hot stretch? Did you add a pool, refrigerator, electric vehicle, water treatment system, or other equipment?
Changes in household schedules can matter too.
Step 3: Check Your HVAC
Look at your filter and thermostat. Pay attention to longer run times, uneven cooling, unusual sounds, or changes in comfort.
Step 4: Think About Your Water System
If you have a well, lake pump, grinder pump, or electric water heater, consider whether you have noticed changes in pressure, cycling, hot water, or pump operation.
Step 5: Have the System Professionally Diagnosed
If something does not add up, get the system checked before replacing equipment.
At Lantz, we believe homeowners should understand what is happening before they make a major repair or replacement decision. Our technicians diagnose the problem, explain the options, and provide upfront pricing before approved work begins.
Related HVAC, Plumbing & Electrical Services from Lantz
A high electric bill can cross trade boundaries, which is one reason working with a company that handles plumbing, AC, and electrical services can be helpful.
Lantz Air Conditioning Services can help with AC maintenance, repairs, diagnostics, and replacement.
Lantz Plumbing Services can help with water heaters, lake pumps, leaks, pipe repairs, and other plumbing systems.
Lantz Electrical Services can help troubleshoot electrical problems and maintain the electrical systems your home's major equipment depends on.
Protect Your Home With the Ultimate Home Care Plan
One of the best ways to avoid discovering a problem when your system has already failed is to stay ahead of maintenance.
Lantz's Ultimate Home Care Plan is built around proactive care for the major systems in your home, including HVAC, plumbing, electrical, and grinder pump systems. Depending on your membership, benefits can include seasonal HVAC inspections, annual water heater maintenance, electrical safety inspections, grinder pump inspections, priority scheduling, and member savings.
The goal is not to sell you something you do not need. It is to create a maintenance schedule that helps you understand the condition of your home's systems and make informed decisions before small problems become expensive emergencies.
Serving Austin and Central Texas Homeowners
High energy use can look different depending on where you live and what systems your home has.
Lantz Home Services proudly serves homeowners in Austin, Lago Vista, Lakeway, Bee Cave, Spicewood, Cedar Park, Leander, Jonestown, Point Venture, Marble Falls, Horseshoe Bay, Kingsland, Georgetown, Round Rock, and surrounding Central Texas communities.
From an Austin home with aging ductwork to a Lago Vista lake house with a grinder pump, well system, or lake pump, understanding your home's equipment is the first step toward maintaining it properly.
Frequently Asked Questions
Why is my electric bill suddenly so high?
A sudden increase can come from hotter weather, increased electricity use, changes in utility rates, or a home system that is operating inefficiently. HVAC equipment is an important place to investigate in Central Texas, but water heaters, pumps, pool equipment, and electrical problems can also contribute.
Does an old AC use more electricity?
An older AC is not automatically inefficient, but aging equipment can lose performance or require more frequent repairs. A professional evaluation can determine whether maintenance, repair, or replacement makes the most financial sense.
Can a dirty HVAC filter increase my electric bill?
A heavily restricted filter can reduce airflow and make your HVAC system work harder. Replacing filters according to the manufacturer's recommendations is a simple maintenance step that can support proper airflow.
Can a water heater cause a high electric bill?
Yes. Electric water heaters are significant energy users in many homes. Sediment, aging components, poor operation, or an inefficient system can affect performance and energy consumption.
Can a pool pump make my electric bill go up?
Yes. Pool pumps can operate for several hours a day, making them an important electrical load. An inefficient or aging pump may use more electricity than necessary.
Can a well pump or lake pump cause a high electric bill?
Potentially. If a pump is running more frequently or for longer periods than normal, there may be an issue with the pump, pressure system, plumbing, or water supply that needs to be evaluated.
Should I replace my AC if my electric bill is high?
Not necessarily. A high electric bill alone is not enough reason to replace an AC. Proper diagnostics can help determine whether the issue is maintenance, airflow, ductwork, electrical, equipment condition, or another factor.
How can I lower my electric bill in Austin?
Start by monitoring your electricity usage and identifying which systems are contributing most to consumption. Austin Energy offers energy monitoring tools and several residential efficiency programs, including incentives for qualifying HVAC, water heating, pool equipment, and whole-home efficiency improvements.
When should I call a professional about a high electric bill?
If your electricity usage has increased without an obvious explanation, your HVAC is running unusually long, your pump is cycling constantly, or you notice electrical warning signs, it is worth having the appropriate system professionally evaluated.
The Bottom Line
A high electric bill does not automatically mean you need a new air conditioner.
Your home's energy use is connected to many systems working together. In Central Texas, HVAC equipment, ductwork, water heaters, pool equipment, well and lake pumps, grinder pumps, and electrical systems can all play a role.
The smartest approach is to identify the cause before spending money on a solution.
When you need help figuring out what is really happening, Leave It to Lantz. Our team can evaluate the systems we service, explain what we find, and give you clear options so you can make the right decision for your home.