The Most

Dependable HVAC


“When You Need a Mechanic, Not a Salesman!”

Trustworthy HVAC Maintenance, Repair, & Installation in O’Fallon IL

Here at Dependable Heating and Cooling, we take great pride in carrying infamous brands, like Ruud, that live up to the expectations for quality. We specialize in residential and light commercial HVAC installations and repairs throughout O’Fallon, Illinois.

We offer military and senior discounts!

hvac repair o'fallon il

Heating and Cooling Services in Alton Illinois

From cleaning out your air filtration unit to reduce allergens, to installing a rooftop heating and cooling system for your business, we are the specialists for the job. With over 20 years of experience in the HVAC industry, we are the premier choice for HVAC installation and repair.

Light Commercial Services
AC Repairs & Replacement
Heating Repairs & Replacement
Thermostat Repair
Air Conditioning Services
AC Repair (Any Brand)
AC Replacement
Emergency AC Repair
Heating Services
Maintenance & Repair
Thermostat Repair
Air Filtration Services
Purifies Stale Odors & Allergens
Eliminates Molds, Germs, & Pollen
Keeps Air Clean