Air conditioning
AC repair, replacement and new installs. Air conditioning out? We'll be there today.
Family owned & operated · Fair Oaks since 1989
Fair Oaks heating & air, from a family that picks up the phone.
Air conditioning out? We'll be there today. AC, furnace and heat pump repair and installation within 30 miles of Fair Oaks. When you call, you reach Don.
- 5.0★ Google, 93 reviews
- A+ BBB accredited
- 7–9 open every day
- #825314 CA license
Scroll to cool things down
What we do
Heating & cooling, start to finish.
Furnaces & heat pumps
Furnace repair and replacement, heat pumps, gas or electric, most major brands.
Wi-Fi thermostats
We install and set up most major smart thermostat brands.
Water heaters
Water heater replacements.
Whole-house & attic fans
Ventilation that takes the edge off Sacramento evenings.
Maintenance
Care that helps you avoid expensive repair bills.
Two generations
Serving Fair Oaks since 1989.
Founded by Donald Cassel Sr., Cassel Air Conditioning & Heating Service has served Fair Oaks since 1989, and the family's heating and cooling experience goes back to 1982. Don still does the repairs and installs himself, with his assistant Molly alongside.
We'll work with you to make sure your system is efficient and serving you to the fullest, and to help you avoid costly repair bills.
- 1982The family starts in heating & cooling
- 1989Cassel opens in Fair Oaks
- 2011BBB accredited (A+)
- TodaySecond generation, still owner-operated
Reviews
“Don answered the phone.”
5.0★ on Google · recent reviews from casselair.com, Aug 2026
“Not only did they do an exceptional job but they explained exactly what they were doing and there were no hidden costs... Because he wasn’t completely pleased with the airflow, he came out the following two days to refine the system.”
Kathy Pelletier · Aug 21, 2026
“Don and helper Molly were great! I couldn’t say enough about how they took care of everything with my ac during this awful heatwave. Working tirelessly to get it up and running, working even on the weekend.”
Rochelle Sellers · Aug 9, 2026
“OMG Don answered the phone and then managed to have our AC up and running the next day!! I will continue to call Don for all my heating and cooling work.”
Frank Adams · Aug 6, 2026
“Don helped us solve our problem very efficiently and inexpensively! I have called him for a couple of problems over the years and he has always been very helpful.”
Lindsey Cole · Aug 21, 2026
Service area
Up to 30 miles from Fair Oaks.
- Cameron Park
- Carmichael
- Citrus Heights
- El Dorado Hills
- Elk Grove
- Fair Oaks
- Folsom
- Granite Bay
- Orangevale
- Rancho Cordova
- Rocklin
- Roseville
- Sacramento
- Sacramento County
Get HVAC work today
Tell us what's going on.
Calling or texting reaches Don directly and is the fastest way to get help. Or send the form and we'll get back to you.
- Call
- (916) 983-2503
- Text
- (530) 363-0564
- d.cassel@att.net
- Hours
- Every day, 7am – 9pm
- Based in
- Fair Oaks, CA 95628
FAQ
Common questions
Do you offer same-day AC repair?
When your air conditioning is out, call and we'll do our best to get there today. Reviewers regularly mention next-day or even same-day fixes from Don.
Who will work on my system?
Cassel is a family-owned, owner-operated business. When you call or text, you reach Don Cassel directly, and he does the repairs and installations himself.
What areas do you serve?
Fair Oaks and up to about 30 miles around it, including Cameron Park, Carmichael, Citrus Heights, El Dorado Hills, Elk Grove, Fair Oaks, Folsom, Granite Bay, Orangevale, Rancho Cordova, Rocklin, Roseville and Sacramento.
Do you work on all brands?
We sell, install and repair most major brands of furnaces, heat pumps and air conditioners, gas or electric, and work with most Wi-Fi thermostats.
Are you licensed?
Yes. California State License #825314. Cassel is also BBB accredited with an A+ rating.
What are your hours?
7am to 9pm, seven days a week.