(480) 654-8865Practical tips from PlumbSmart’s HVAC technicians in Phoenix and Mesa
Opening a sky-high utility bill in the middle of a Phoenix summer shouldn’t be the price you pay just to stay comfortable at home.
The good news: most of it comes down to energy efficiency — and small fixes make a dramatic difference
A lot of homeowners assume cutting energy costs means sweating through July or freezing in January. In reality, most high energy bills come down to a handful of inefficiencies—not your comfort settings.
If you address those directly, you can lower your monthly costs without changing how your home feels.
Here’s how to do it.
The 3 Biggest Drivers of High Energy Bills
Before we get into how to fix a sky-high utility bill, we have to look at why it’s happening in the first place.
If you feel like you’re always fighting to keep costs down, the issue usually boils down to three main culprits:
- Playing with the thermostat: If you’re constantly tweaking the temperature or cranking the AC way down to cool off faster, you’re just forcing your system to run non-stop.
- Drafts and bad insulation: It makes zero sense to pay for heating or cooling if the air is just going to slip right out of a drafty window or a poorly insulated attic.
- Neglected HVAC units: Older, dirty, or poorly maintained systems have to pull a lot more electricity just to do their basic jobs.
Quick Ways to Lower Your Energy Bills (No Cost)
You can actually start dropping your energy usage today without spending a dime.
Optimize Your Daily Thermostat Settings
It all starts with how you handle your thermostat. The Department of Energy recommends setting your thermostat to 78°F in the summer and 68°F in the winter. To save up to 10% a year on heating and cooling, adjust your thermostat by 7 to 10 degrees for 8 hours a day.
The secret to doing this without sacrificing comfort is timing. Let the house drift to these energy-saving temperatures while you are asleep or away at work. The house is only “uncomfortable” when no one is awake or home to notice it.
The “Super Cooling” Strategy
If your local utility company uses a Time-of-Use (TOU) plan—such as APS or SRP in Arizona—you can use a method called “Super Cooling.” During peak hours (typically 4 PM to 7 PM), electricity is at its most expensive.
Instead of letting your AC fight the heat during this window, aggressively cool your home down to 68°F or 70°F early in the afternoon when rates are cheap. Right before peak hours begin, bump the thermostat up to 78°F. Your home’s insulation will hold onto that chilled air, allowing your AC to rest during the most expensive part of the day while you stay perfectly comfortable.
Harness Natural Sunlight and Strategic Shading
You can use the sun to your advantage through passive solar heating and cooling. During brutal summer afternoons, keep your blinds and curtains closed, especially on west and south-facing windows, to block solar heat gain. In the winter, do the exact opposite.
Open your window treatments during the day to let free solar heat naturally warm your living areas.
Utilize Ceiling Fans Correctly
Take a look at your ceiling fans. During the summer, make sure the blades are spinning counterclockwise; this pushes the air straight down to create a breeze.
In the winter, flip the switch so they run clockwise on low. This gently pushes the warm air that gets trapped up at the ceiling back down into the room.
Just remember that fans cool people, not rooms. Leaving them on when nobody is in the room is just throwing money away.
Low-Cost Upgrades That Make a Big Impact
If you’re willing to spend a little bit of money, a few basic DIY projects can make a massive difference in keeping your conditioned air inside where it belongs.
Seal Air Leaks Around Doors and Windows
Drafty rooms force your AC and heater to work overtime. Take a few minutes to check the caulking around your windows and the weatherstripping on your doors. Patching up those gaps is honestly one of the cheapest and fastest ways to stop wasting air.
This is important if you have a two-story house because of an air leak issue called the “stack effect.” Basically, hot air rises and leaks out of the second floor, which then creates a vacuum that sucks unconditioned outside air right in through your ground floor.
Upgrade to a Smart Thermostat
A smart or programmable thermostat completely removes human error from the equation. You never have to worry about forgetting to change the temperature before work again. A lot of the newer ones even use geofencing to track your phone’s location. They’ll automatically switch to an eco-friendly mode when you drive away and start cooling the house back down right as you’re heading home.
Evaluate and Improve Attic Insulation
Heat naturally rises. In the winter, it escapes rapidly through a poorly insulated attic. In the summer, that same under-insulated space essentially bakes the rest of your house. Upgrading your attic insulation is a one-time cost that delivers year-over-year returns by solidifying your home’s thermal envelope.
Why Your HVAC System Might Be Costing You More Than You Think
Even a perfectly sealed home will suffer from high energy bills if the mechanical equipment is struggling to breathe.
The Cost of Neglect: A Real-World Scenario
Consider a standard 2,000 sq. ft. home. If the homeowner neglects basic maintenance, a clogged filter and dirty condenser can easily force the HVAC system to run 20% longer to reach the target temperature. On a $300 summer utility bill, that inefficiency costs an extra $60 a month. Over a five-month cooling season, that is $300 wasted—more than enough to cover the cost of professional maintenance.
Regularly Change Your Air Filters
A clogged air filter restricts airflow, essentially suffocating your system. This forces the blower motor to draw more electricity and can even cause the evaporator coil to freeze solid. Check standard 1-inch filters every 30 days and replace them at least every 90 days.
Keep Your Outdoor Unit Clear of Debris
Your outdoor condenser relies on proper heat exchange to cool your home. Keep a two-foot clearance around the perimeter of the unit. Trim back overgrown shrubs, sweep away fallen leaves, and gently wash away any dirt caking the aluminum fins.
How to Stay Comfortable While Spending Less
Lowering your energy bill doesn’t mean sacrificing comfort. It comes down to control.
When your home:
- Holds conditioned air properly
- Runs an efficient HVAC system
- Uses smart temperature strategies
… you don’t need extreme settings to feel comfortable.
Most homeowners aren’t overusing energy; they’re simply losing it.
Fix that, and the results show up quickly on your monthly bill.
When It Makes Sense to Upgrade Your System
At a certain point, maintenance is no longer enough. If your air conditioner or heat pump is over 10 to 12 years old, its baseline efficiency is likely costing you money.
Furthermore, the HVAC industry is currently undergoing a massive shift away from older R-410A refrigerants in favor of modern, eco-friendly alternatives. As older refrigerants are phased out, the cost to recharge a leaking, aging system is skyrocketing.
If you are facing a major repair on a unit over a decade old, the monthly energy savings of upgrading to a high-efficiency system will often offset the cost of the replacement over time.
Fix It Today Call Arizona’s Affordable Plumbing Experts Today
Final Takeaway: Lower Bills Without Sacrificing Comfort
Keeping your bills manageable is really just about building better daily habits, tackling a few cheap home improvements, and taking care of your gear.
We’ve seen this play out thousands of times across Mesa, Phoenix, and Colorado Springs. A customer calls us about a sky-high bill, we do a tune-up, swap their ancient filter, and walk them through their thermostat schedule — and their next bill drops $80. It’s not magic. It’s just maintenance. If you want a set of expert eyes on your system before summer peaks, give us a call.
However, even the best DIY efforts can only go so far without a mechanically sound system. The easiest way to ensure your equipment is operating at peak efficiency, and to stop overpaying the utility company, is to have a professional evaluate it.
Contact PlumbSmart For More Expert Help
Ready to stop guessing and start saving? Call PlumbSmart at 480-654-8865 or book online — our HVAC techs serve Mesa, Phoenix, and Colorado Springs with same-week availability..
Here’s what our clients say about us:
“I had an incredible system put in my house and three of my rentals, all by PlumbSmart. My power bill has gone down drastically, and they were great.”
Arthur Silver
“They installed a water softener and an A/C unit for my house… It’s crazy to me that I got the same quality equipment for so much less. My water softener was going to cost me $7,000 with another company, and it only cost me $1,000 to install with PlumbSmart.” > — Mario Jiannino [Read full review]
Frequently Asked Questions
What is the “Super Cooling” strategy?
Super Cooling is a tactic for homes on Time-of-Use (TOU) electricity plans. Instead of running your AC during peak hours (usually 4 PM to 7 PM) when electricity is most expensive, you aggressively cool your home to 68°F–70°F earlier in the afternoon. Right before peak hours hit, you raise the thermostat to 78°F. Your home stays cool from the trapped chilled air while the AC rests during expensive hours.
What are the best low-cost upgrades to stop energy loss?
If you are willing to spend a little money, you can try a few strategies. First, seal any leak by using caulking and weatherstripping around doors and windows so you can prevent the “stack effect,” where hot air escapes the second floor and sucks unconditioned air into the ground floor. Secondly, install a smart thermostat to automate your temperature settings, and lastly, improve your attic insulation to stop heat from escaping through the roof in the winter.
How often do I need to maintain my HVAC system?
Basic maintenance prevents your system from suffocating and overworking. Check standard 1-inch air filters every 30 days and replace them at least every 90 days. You should also regularly clear leaves, dirt, and overgrown shrubs to maintain a two-foot clearance around your outdoor condenser unit.
When does it make sense to replace my HVAC system instead of repairing it?
If your air conditioner or heat pump is over 10 to 12 years old, its baseline inefficiency is actively costing you money. Additionally, older refrigerants are being phased out, causing the cost to recharge aging, leaking systems to skyrocket. In these cases, the monthly energy savings of a modern, high-efficiency system will often offset the replacement cost over time.
