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Mini Split Repair

Mini split repair in Ontario & the Inland Empire.

Mini split not heating, not cooling or leaking indoors? Describe the affected room, selected mode and what changed. Alex Air & Heating provides ductless mini split repair in Ontario, Pomona, the Inland Empire and nearby eastern Los Angeles County service areas.

Call 626-777-4822Schedule service

Appointments based on current availability · Open Mon–Sun · 8:00 AM – 6:00 PM.

Alex Air & Heating technician performing mini split repair in the Inland Empire & LA County

Availability

Service is available across the Inland Empire and East LA County. Call during business hours to confirm the next open appointment.

Quick answer

Mini Split Repair from Alex Air & Heating Services LLC: Expert repair for ductless mini split systems. We serve Ontario, the Inland Empire & East LA County with appointments based on availability, an EPA 608-certified technician and upfront, written pricing. Call 626-777-4822 during business hours to confirm availability.

Residential & Commercial

For mini split repair, tell us whether the problem affects one indoor unit or every zone, what the controller displays and when the change began. A unit that stops delivering warm air, leaks indoors or shows an alert needs an equipment-specific diagnosis; the symptom alone does not identify a failed part. We evaluate the relevant indoor and outdoor equipment, controls and drainage, then explain the documented findings and proposed repair scope. Keep covers closed and leave refrigerant, electrical and internal drain work to a professional.

What's included

  • All major ductless brands serviced
  • Refrigerant & sensor diagnostics
  • Drainage & condensate troubleshooting
  • Indoor & outdoor unit repair

Why choose Alex Air & Heating

EPA-Certified
Written Pricing
Availability Confirmed by Phone
Documented Service Scope

Backed by our warranty

Labor warranty 3 Years · Parts warranty 5 Years · Compressor warranty 7 Years. No hidden fees — you approve the price before we begin.

Why choose Alex Air & Heating

What you actually get when you call us.

Appointments based on availability.

Call during business hours to confirm the next available appointment. Timing depends on the current schedule.

Upfront pricing, no surprises.

We diagnose, quote, and explain — then you decide. You approve the price before any work begins, with no hidden fees at the end.

Every make & model.

Our EPA-certified technicians evaluate major HVAC system types and explain any parts or follow-up work the documented diagnosis requires.

How it works

Four steps. No surprises.

01

You call

Reach us at 626-777-4822. We'll book your appointment and share a real arrival window — not an all-day block.

02

We diagnose

A full system inspection — refrigerant, electrical, airflow and controls — to find the real root cause, not just the symptom.

03

You approve

You get an upfront, flat price before any work starts. Repair or replace? We give you the honest numbers.

04

We complete the approved scope

We perform the work you authorize, test the relevant operation, clean the work area, and explain any documented follow-up.

Related services

Round out your home comfort.

Popular services and plans homeowners pair with this one.

AC Repair

AC repair for no cooling, warm air, weak airflow and startup problems across the Inland Empire, with a documented diagnosis and written price before work begins.

Learn more

AC Installation

Right-sized, high-efficiency AC installation done right the first time.

Learn more

Maintenance Membership

Just $199 per system per year — an annual tune-up, 10% off all repairs, no overtime fees and free filters.

See membership perks
Good to know

Mini Split Repair FAQs

Yes, our technicians are trained on all major ductless mini split brands and carry common parts for fast repairs.

Share the selected mode, exact controller display, affected room or zones and when the change began. Keep the equipment closed; a symptom or error display alone does not identify the failed part.

Common causes include low refrigerant, a dirty filter, a faulty sensor or a drainage issue. We diagnose the real cause before any work begins.

Stop the affected unit at its normal controller if safe, move nearby belongings and keep clear of wet electrical areas. The source needs inspection; visible water does not prove a blocked drain. Do not remove covers or try to clear internal drains.

Yes, we repair both the indoor air handlers and the outdoor condenser of your ductless system.

Service information maintained by Yuan Pan, Owner & Lead HVAC Technician. EPA 608 Universal Certification.

Related HVAC guidance

Read before you schedule

Guides

Mini-Split Not Heating After a Mode Change: What to Check Safely

A quiet fan after selecting Heat may be a startup transition. Check the requested mode, the unit’s response and whether the room begins warming before guessing a fault.

Read guide →

Guides

Mini-Split Leaking Water Indoors: What to Do Before Service

Protect nearby finishes, pause the ductless unit safely, and record the drip path rather than guessing a cause.

Read guide →
Service area

Serving the Inland Empire & LA County.

Service-area HVAC business serving the Inland Empire, Los Angeles County & surrounding areas

Check your address

Do we cover your ZIP?

Not sure if you're in our area? Enter your ZIP above — we cover most of the Inland Empire & LA County.

  • EPA-certified technicians
  • Honest, upfront pricing — no hidden fees
  • Appointment availability confirmed by phone

Prefer to talk? Call 626-777-4822

Where we workDon't see your city? Just ask.

19 cities across 4 regions

OntarioRancho CucamongaFontanaUplandMontclairRialtoRedlandsSan BernardinoRiversideCoronaEastvaleJurupa ValleyPomonaClaremontWalnutDiamond BarRowland HeightsChinoChino Hills

Locally owned & operated

An independent local team serving the Inland Empire & LA County.

Clear scheduling

Call during business hours and we'll do everything we can to dispatch a tech the same day.

Fast response times

We answer fast and show up when we say we will.

Need mini split repair?

Written pricing, EPA 608-certified expertise, and appointment timing confirmed before you book.

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