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Heating & air conditioning in El Cajon
AC repair, heating repair, maintenance and new systems for homes and businesses in El Cajon. Family-owned, with our shop nearby in Alpine.
- Free estimates on new systems
- Residential & commercial
- 5-star Google reviews
Serving El Cajon: $89 first-hour diagnostic on heating and AC repairs, free estimates on new and replacement systems, and financing available on new systems.
El Cajon homes & businesses
Built for East County summers
- Long cooling seasonsAir conditioners and heat pumps run hard through the hottest months, and that's when worn parts tend to fail.
- Pre-summer tune-upsA spring maintenance visit, $89 per unit, is an easy way to catch weak capacitors, dirty coils and drain problems before a heat wave.
- Repair or replace?If an older AC keeps breaking down, we'll give you an honest answer on whether repairing it still makes sense, plus a free replacement estimate.
- Cool winter nightsWinters are mild, but nights get chilly, so your furnace or heat pump still needs to start reliably.
- Commercial rooftop unitsOffices, shops and restaurants depend on rooftop package units. We repair, maintain and replace them.
El Cajon sits in an inland valley, and summer afternoons usually run noticeably hotter than at the coast. That puts real demand on air conditioners, so cooling is where most problems show up.
What we do
HVAC services in El Cajon
Repair, maintenance and installation for El Cajon homes and businesses, on all makes and models.
AC repair
Warm air, ice on the lines, leaks or an AC that won't start. $89 first-hour diagnostic.
Learn more →AC installation & replacement
New and replacement central air, sized for your home. Free estimates.
Learn more →Maintenance & tune-ups
$89 per unit to keep your system efficient and reliable.
Learn more →Heating & furnace repair
No heat or cold air from the vents. Gas furnaces, heat pumps and air handlers.
Learn more →Heat pumps
Efficient heating and cooling in one system, ducted or ductless.
Learn more →Commercial rooftop units
Repair, maintenance and replacement for local businesses.
Learn more →
A family business. Owner Mike Mauzy has 20 years in the HVAC trade. He learned it from his grandpa and his dad, founded 75 Degree Heating & Air in 2020, and is still out in the field with his NATE-certified crew. Our shop is at 2558 Eltinge Dr. in Alpine. Our story →
FAQ
El Cajon HVAC FAQ
Why does my AC struggle on hot El Cajon afternoons?
Common causes include a dirty filter or coil, low refrigerant, a failing capacitor or fan motor, or a system that's too small for the home. A diagnostic visit ($89 for the first hour) will pinpoint the cause.
Should I repair or replace an older air conditioner?
It depends on the age and condition of the system and the cost of the repair. We'll give you an honest recommendation, and replacement estimates are free.
Do you service commercial rooftop units in El Cajon?
Yes. We diagnose, repair, maintain and replace rooftop package units for businesses across greater San Diego, including El Cajon.
Is financing available on a new system?
Yes, financing is available on new systems. Ask us for details when we give you your free estimate.
Heating or AC trouble in El Cajon?
Call 619-333-7575 or book online. $89 first-hour diagnostic; free estimates on new systems.
Or email us at mike@75hvac.com