Top-Rated AC Repair in Sunnyvale, CA by Certified Pros
Sandium Heating and Air Conditioning offers professional AC repair in Sunnyvale, CA. Our licensed team ensures fast fixes, efficient service, and reliable cooling all year round.

Our partners
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Major Benefits You Get with AC Repair in Sunnyvale, CA by Sandium Heating and Air Conditioning
Efficient Cooling Backed by Local Expertise
- Immediate Service Response: Our Sunnyvale-based team arrives quickly, identifying AC issues early to prevent serious damage and restore comfort the same day.
- Specialized Knowledge in AC Units: Sandium Heating and Air Conditioning technicians are well-trained in repairing all brands and models with accuracy and professionalism.
- Energy & Cost Efficiency: Our targeted repairs improve system performance, help reduce power consumption, and lower monthly energy bills over time.

Why Homeowners Prefer AC Repair in Sunnyvale, CA by Sandium Heating and Air Conditioning for Consistent Comfort
Your Trusted HVAC Partner in the Bay Area
- Tailored for Sunnyvale Homes: Our repair services are designed to meet Sunnyvale’s climate challenges, ensuring year-round comfort with precision-tuned solutions.
- End-to-End Cooling Support: Sandium Heating and Air Conditioning delivers diagnostics, fixes, and ongoing support to keep your system in peak condition long-term.
- Customer-First AC Solutions: We believe in transparency, reliability, and friendly service—values that make us a top choice for AC repair in Sunnyvale, CA.

Frequently asked questions
Everything you need to know about and how we can help.
Common signs include weak airflow, warm air blowing instead of cool, strange noises, bad odors, frequent cycling, or unusually high energy bills.
It's recommended to service your AC unit at least once a year. Regular maintenance helps prevent breakdowns and keeps the system running efficiently.
You can replace air filters and check the thermostat, but repairs involving refrigerant, motors, or electrical components should be left to professionals.
Most standard AC repairs can be completed within 1 to 3 hours, depending on the complexity of the problem and the availability of replacement parts.
If your AC is over 10–15 years old and requires frequent repairs, it might be more cost-effective to replace it with a newer, energy-efficient model.
Warm air can be caused by issues like low refrigerant, a dirty air filter, or a malfunctioning compressor. A professional diagnosis is recommended.
Check your thermostat settings, air filter, circuit breakers, and ensure the vents are not blocked. If issues persist, contact a licensed technician.
No. Running a noisy AC unit may cause further damage. Shut it off and call a technician to prevent more costly repairs.
This could be a sign of short cycling, often caused by thermostat issues, dirty filters, or an improperly sized system. It requires prompt attention.
Costs vary depending on the issue, but minor repairs can range from $100 to $300, while major component replacements may cost more.
Don't just take our word for it
Our satisfied customers are our biggest advocates. Don't just take our word for it – hear what they have to say about their experience with Sandium.
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Lisa Rose
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Camila Mata
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Tyler White
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Isaiah Jenkins
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Tyler Anderson
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Jean Schmidt
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Toni Lumpkin

Schneider Katy
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Alax Alisha
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Larry Siegel
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Gianna Estes
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Lisa Rose
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Camila Mata
.png)
Tyler White
.png)
Isaiah Jenkins
.png)
Tyler Anderson
.png)
Jean Schmidt
.png)
Toni Lumpkin

Schneider Katy
.png)
Alax Alisha
.png)
Larry Siegel
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Gianna Estes
Areas we service
Atherton, Campbell, Cupertino, Hillsborough, Los Altos Hills, Los Altos, Los Gatos, Mountain View, Palo Alto, Portola Valley, Redwood City, San Carlos, San Jose, Santa Clara, Saratoga, Sunnyvale, Woodside
Join the Future of Home Comfort
Take the first step towards comfortable, energy-efficient, and stress-free living by scheduling a consultation with Sandium.
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