What Maintenance Does an Air Conditioner Need?
Every air conditioner needs maintenance, whether it’s brand new or has been running for years. Without it, the system has to work harder just to keep your home cool. A tune-up helps your AC run the way it’s supposed to—cooling your home faster, using less energy, and avoiding sudden breakdowns when the weather gets hotter.
Here’s what you should know:
- We recommend scheduling a professional air conditioner tune-up once a year, ideally in the spring before the summer heat kicks in.
- During the visit, we’ll clean the system, check refrigerant, test parts like motors and thermostats, and make sure everything’s running smoothly and safely.
- With regular maintenance, your AC cools more efficiently, avoids unnecessary wear, and stays covered under warranty since most manufacturers require yearly service to keep it valid.
At Guthrie & Sons, we service all types of air conditioners throughout San Diego County—whether you're in Clairemont, La Mesa, Chula Vista, Poway, El Cajon, or Escondido. A quick tune-up now keeps your home cooler, quieter, and more comfortable all season.
Make AC Maintenance Even Easier by Joining Our USA Membership Plan
It’s easy to forget about AC maintenance—but with our USA Membership Plan, you don’t have to. We’ll remind you when it’s time for service, set up the appointment, and take care of everything while you relax.
Benefits are eligible for a wide range of benefits, including:
- Priority service when you need it
- Lower service call fees and 15% off any repairs
- An extended 5-year warranty
No matter what kind of system you have—central air, heat pump, or ductless—we’ll make sure it’s covered. It’s one of the easiest ways to keep your home comfortable and your AC running stronger for longer. Ask your technician or call our office to join today—it pays for itself so fast!
Inside Our 26-Point AC Tune-Up: What We Check and How You Benefit
We know—you just want an air conditioner that cools your home, doesn’t make weird noises, and doesn’t drive up your energy bill. You might already change your air filter each month (well done!), but keeping your system in shape takes more than that, especially as it gets older.
The parts inside your AC—coils, motors, wiring, sensors—need a little TLC to keep everything running smoothly and prevent problems down the line. Here’s more on what we’ll do during your San Diego air conditioning maintenance:
What to Expect After Your Air Conditioner Maintenance Appointment
If everything looks good, great—we’ll let you know and give you a few easy tips to help keep it that way. But if we find something like low refrigerant, worn electrical parts, or weak airflow from dirty coils, we’ll walk you through your options—whether that’s a simple AC repair, a deeper clean, or planning for a future air conditioner replacement.
Catching those early signs now can help you avoid sudden breakdowns later—and give you time to budget and prepare if your system is getting close to the end of its lifespan.
You’ll also get a detailed service report to keep for your records and warranty. And if you want an extra layer of protection, ask about HVAC system monitoring. We can install a small sensor that tracks how your AC is performing day to day, so we can spot changes remotely and get a service call scheduled sooner.
Whether your system’s got years left or might need replacing soon, our air conditioning maintenance in San Diego helps you stay ahead of it.
- INSTALLATION
Up to $11,225 Off a New Heat Pump
Receive up to $8,000 in HEEHRA rebates, up to $625 in Comfortably California rebates, and up to $2,600 in Federal Tax Credits when you install a new heat pump system. Must be income-qualified to receive HEEHRA rebate. Valid on residential properties only. Valid on select systems. Rebates available until funds last. System must be installed by 1/31/26 to receive Federal Tax Credits. Restrictions apply. See dealer for details.
- INSTALLATION
$8,000 HEEHRA Rebate
Get income-qualified and receive an $8,000 rebate on a new heat pump system. Can be combined with up to $625 Comfortably California rebate, $2,000 heat pump Federal Tax Credit and $600 electrical upgrade Federal Tax Credit. Rebate available until funds last. Restrictions apply. See dealer for details. Offer expires 1/31/26.
- INSTALLATION
$625 Comfortably California Rebate
Valid on select systems. Valid on residential properties only. Can be combined with HEERHA rebates, $2,000 heat pump Federal Tax Credit and $600 electrical upgrade Federal Tax Credit. Rebate available until funds last. Restrictions apply. See dealer for details. Offer expires 1/31/26.
- INSTALLATION
$2,600 Heat Pump Federal Tax Credit
Valid on select systems. Must be installing a heat pump system with electrical wiring or panel upgrade. Valid on a primary residential home only. Can be combined with HEEHRA rebates and up to $625 Comfortably California rebates. System must be installed by 1/31/26 to receive this tax credit. Restrictions apply. See dealer for details.
Real Reviews From Real Customers
We do things differently, and our customers appreciate it. See what some of our thousands of satisfied customers have to say about working with us.
I only wish the annual service was cheaper 🙂
Carson C. and Michael J. came by to install our unit. They were on time, extremely professional and worked diligently to complete everything. They listened to our needs throughout and made adjustments to our specifications. Carson did not leave until we were totally happy with our unit.
This was a great experience all around and I gladly recommend Guthrie and Son's for all your HVAC needs.
From start to finish, their team was outstanding. They worked incredibly hard, treated our home with respect, and left everything spotless—truly the cleanest job site I’ve ever seen after a major project. The installation itself was seamless, and the quality of their work shows in every detail.
If you’re looking for a company that combines deep knowledge, excellent craftsmanship, and genuine care for their customers, Guthrie & Sons is it. Absolutely five stars across the board!
What really stood out was his problem-solving ability and willingness to go the extra mile to ensure everything was operating as it should. He communicated clearly throughout the process, kept us updated, and made sure we felt confident in the work being done.
It’s not often you come across someone who combines technical expertise with such a strong work ethic and positive attitude. We’re very grateful for his efforts and would highly recommend Kareen to anyone needing reliable HVAC service.
Vlad came out to provide an estimate and was able to size an HVAC system that worked well for my house.
They installed it quickly, without issue and helped me set up an app on my phone to control.
The system is working great to heat and cool my house and is whisper quiet.
Highly recommend going with Guthrie and Sons if you want a high quality experience for large and important purchases.
