Know what's actually wrong before you spend a dime
El Cajon heating and air work that starts with a diagnosis, not a sales pitch — repairs, installs, and maintenance for homes across the East County.
HoursOpen 24/7
DirectionsServices
What we do
- 01
AC & heating diagnostics
A full check of your system's pressure, airflow, and electrical draw before any repair or replacement gets recommended.
- 02
AC repair
Warm air, short-cycling, or a system that won't start — diagnosed and fixed, with the failed part explained, not just replaced.
- 03
AC & furnace installation
New systems sized to your house's square footage and duct layout, not just swapped for the biggest unit that fits the closet.
- 04
Heating repair
Furnace not lighting, blowing cold, or smelling off — checked for safety first, then repaired.
- 05
Preventive maintenance plans
Scheduled check-ins that catch a failing capacitor or clogged coil before it turns into a no-cool afternoon.
- 06
Mini-split systems
Ductless heating and cooling for additions, converted garages, or coastal-influenced homes that were never built with ducts.
Based in El Cajon, working across the East County
Based in El Cajon, CA.
Directions- Rancho San Diego
- Fletcher Hills
- La Mesa
- Santee
- Licensed California contractor #967016
- Diagnosis before any repair quote
- Serving El Cajon and the East County
- System sized to your actual house
CA License
#967016Gauges before guesses
We test refrigerant pressure and airflow before recommending a repair or a replacement.
Sized, not upsold
Equipment is sized to your home's load and ductwork, not to the biggest unit on the truck.
You see the reading
We walk you through what the gauge or meter shows before we explain what it means.
We show you the gauge reading, not just the invoice
Air Flex Inc is a licensed heating and air contractor (California license #967016) working out of El Cajon. East County houses run hot in summer and cold enough at night in winter to matter, and a lot of them were built without ducts or with ducts nobody's touched in decades. We check refrigerant pressure, airflow, and duct condition before we recommend anything, and we'll tell you when a repair buys you more years instead of pushing a full replacement you don't need yet.
How do I know if I need a repair or a new system?
We check refrigerant pressure, airflow, and how hard the compressor is working before answering that. A system with strong readings usually just needs a repair; one that's been failing part by part for years may cost more to keep patching than to replace.
How fast can someone come look at my AC?
Call and we'll walk through what's happening on the phone — a dead system in a heat wave gets scheduled differently than a slow leak. We'd rather give you a real answer on the call than a guess on a website.
My house doesn't have ducts in one room — what are my options?
That's common in older or added-on parts of East County homes. A mini-split can heat and cool that space without opening walls for ductwork, sized to the room it's serving.
“Sal really goes above and beyond to get the job done right. Sal installed three heat pumps to date for us, all super high efficiency (high SEER) Fujitsu. I recommend him to friends regularly.”
“I received three proposals for my HVAC replacement and it was obvious that AIR FLEX was the best for me. They listened to what I wanted and guided me the best way to get there.”
“When Air Flex first started its business, we had them install a heating and air system in our son's townhouse. It is still working PERFECTLY.”
Tell us what your system is doing
Rancho San Diego · Fletcher Hills · La Mesa · Santee
Hours
- Open 24 hours, every day