Contact us
Schedule service in O'Fallon, MO
Reach Swiss Air Heating & Cooling by phone, email, or the form below. For emergencies, call (636) 978-7800, we offer 24/7 emergency HVAC service.
Get in touch
We're here to help
Call for the fastest response, especially for no-heat or no-cool emergencies. Otherwise, send a message and our local team will follow up promptly.
- Phone(636) 978-7800
- Email[email protected]
- Address406 E Wabash St, O'Fallon, MO 63366
- Hours24/7 Emergency Service
Emergency service
If your heat or AC is out now, call (636) 978-7800 instead of using the online form.
Book Now
Pick a time that works for you, or send us a message and we'll get back to you as soon as possible.
Schedule online$119 diagnostic fee for a service visit — and it comes straight off your bill if you go ahead with the work.
Visit us
Swiss Air Heating & Cooling
406 E Wabash St, O'Fallon, MO 63366
Proudly serving O'Fallon, St. Charles County, and the greater St. Louis metro.
Get directions- Licensed & Insured
- 24/7 Emergency Service
- Same-Day Service
- Financing Available
- Free Estimates
- 100% Satisfaction Guarantee
While you're here
Answers you might want before we talk
- HVAC emergency? Start here No heat, no cooling, gas smell — what to do right now.
- What a repair or replacement costs Honest installed ranges before anyone visits your home.
- Cities we serve O'Fallon, St. Charles County, and Greater St. Louis.
- Rebates & financing Stack utility rebates with flexible financing options.