Thermostat Repair

Thermostat Repair in Placentia

Affordable, Fast Thermostat Repairs to Keep Your Home Comfortable

Keep your home or business comfortable year-round in Placentia with quick, dependable thermostat repair services. At 20th Century Air, we deliver responsive and honest solutions, drawing on over 38 years serving Orange County. When your thermostat fails or malfunctions, our family-run team combines modern technology with real-world experience. We always provide fair, upfront pricing and a reputation for genuine service throughout the community.

We understand the discomfort and disruption a faulty thermostat can cause during a Southern California heatwave or cool night. Because we live and work in this area, we know how important fast and reliable service is to Placentia residents and businesses. Every visit connects you with dedicated technicians who walk you through your options and prioritize your comfort at every step.

Need thermostat repair in Placentia? Call 20th Century Air at (714) 430-8006 or send us a message online today for quick service and expert advice.

Signs Your Thermostat Needs Immediate Attention

Early detection of thermostat issues prevents discomfort and larger system failures. Common signs include:

Sudden spikes or drops in indoor temperature
HVAC system cycling on and off too frequently
Non-responsive or erratic temperature settings
Blank displays or error codes
Unusually high energy bills
Strange noises from the thermostat or HVAC system

Regular inspections and timely repairs keep your home or business running efficiently and protect your investment in your HVAC system.

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“Quick scheduling, fast quotes, and responsive.”
“Although they originally no-showed, they did good business by rescheduling immediately and providing an additional discount. I think that generally made up for it and deserves 5 stars.”

- Albert C.
“Thank you, 20th C Air!”
“We have found that 20th C Air gives the best prices on the highest quality condensers. The owner Scott is kind and responsible and ready to give great customer service, even when unexpected hiccups appear.”

- A. L.
“They are amazing. We cannot thank them enough!”
“My mother in laws AC unit went out at her manufactured home. It was during this heat wave and she was concerned it would take week or two to get it fixed. 20th century air was phenomenal as always. They came out and fixed it the next day.”

- Jen R.
“Highly recommend”
“Daniel my guy! He came through and fixed our AC. I had a feeling it was the filter or freon. He came showed me where to change the filter. And recommended me do it every 3 months. He didn't try to up sell me on anything. Kept it real and kept the AC runnin”

- Don S.
“Timely, Courteous, & Got the Job Done”
“They worked around my schedule for a consult. The technician was timely, courteous, and got the air conditioning back up and running within 15 minutes. Needless to say my house is now freezing cold. This company is fair, reliable, and didn't try to upsell ”

- Paul T.
“Friendly & Personable”
“20th Century Air is fantastic, they have been servicing my home HVAC system for about 5-6 years now without any issues. All the techs are friendly and personable. I even recommend them to my clients for my home inspection business.”

- Jeff B.
“I would go back for any AC issue in the future.”
“Juan was punctual and very honest with his work. I really appreciate him bringing his own shoe covers for walking around the house. The pricing was fair.”

- Sweet L.
“I would go back for any AC issue in the future.”
“Juan was punctual and very honest with his work. I really appreciate him bringing his own shoe covers for walking around the house. The pricing was fair.”

- Sweet L.

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Why Choose 20th Century Air?

Financing Solutions Available
Ask us about our available financing options. Our valued partnership with Service Finance means that we can help you through any emergency no matter your situation.
Customer Care Focused
We are capable, experienced and willing to help you find HVAC solutions. We promise to do it with a smile on our faces and treat your home with integrity and respect.
35+ Years Experience in HVAC
With over 35 years in the HVAC industry, we believe in staying up to date on the latest technology and remaining dedicated to delivering quality solutions to our customers.
Family Owned & Operated
We are proud members of our community and take pride in serving families like ours across Southern California. We're from the area, know the area, and take solace in knowing there isn't much that will surprise us in our service area.

Choose a Trusted Thermostat Repair Team in Placentia

With decades of local experience and family-owned values, 20th Century Air provides professional and respectful service for every visit. Our licensed technicians are skilled with all major thermostat brands, from traditional models to the latest smart Wi-Fi units. Homeowners and commercial property managers rely on us because we:

Offer honest assessments with no-pressure recommendations
Provide upfront pricing before any work begins
Protect your property using clean work practices and shoe covers
Stay current on local rebates, energy codes, and product compatibility

We repair homes, apartments, offices, and small businesses throughout Placentia. Common issues we handle include:

Inconsistent indoor temperatures
Blank or unresponsive thermostat displays
Stuck or faulty controls
HVAC systems that fail to respond

Every repair begins with a thorough inspection and clear explanation of findings. We also provide calibration, energy optimization, smart thermostat installation or upgrades, and fast service when needed. By working with all major brands and components in Orange County, we resolve even the most persistent thermostat problems efficiently and reliably.

Take the Next Step for Reliable Thermostat Repair

You don’t have to endure inconsistent temperatures or malfunctioning thermostats. Reach out to 20th Century Air for fast, reliable thermostat repair in Placentia.

Our family-owned team values clear answers, honest communication, and dependable service. Flexible maintenance and payment options make every repair stress-free, while our expert technicians ensure your comfort all year long.

Need immediate thermostat repair? Call 20th Century Air at (714) 430-8006 or contact us online today to schedule service.

Commonly Asked Questions

What are common signs that my thermostat needs repair in Placentia?

Inconsistent room temperatures, blank displays, short cycling HVAC systems, and unresponsive controls are common indicators that repair is needed.

How long does thermostat repair typically take?

Most repairs can be completed in a single visit, often within an hour. Complex issues or rare parts may require additional time, which will be communicated upfront.

Can repairing my thermostat reduce energy costs?

Yes. A properly functioning thermostat ensures your HVAC system operates efficiently, reducing energy waste and helping maintain consistent indoor temperatures.

Are smart thermostat upgrades compatible with older systems?

Our technicians evaluate your current system to determine compatibility and guide you through potential upgrades that meet local efficiency standards.

How do local rebates affect thermostat repair or upgrades?

Our team stays informed on California rebate programs, helping you choose energy-efficient solutions that qualify for potential savings.

Ready To Get Started?

Contact us using our contact form or give us a call at (714) 430-8006.

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Discover the 20th Century Difference

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Get to Know Us
Learn about our company history and who we are.

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Club Maintenance Membership Signup/Resign
The Club maintenance membership includes 2 visits per year:
One visit includes the maintenance of the air conditioning system.
The other visit would include the maintenance of the heating system.
As a club member, you would be on our priority scheduling list if any issues arise.
As a club member, you would have exclusive discounts which would include:
- 10% repair discount
- 5% system replacement discount
- 5% IAQ (Indoor Air Quality) discount
Sign Up