MINI-SPLIT REPAIR & TROUBLESHOOTING

In Anne Arundel County

5-Star Service

Licensed & Insured

Same-Day Service Available

Locally Owned & Operated

When your ductless mini-split stops cooling, won't heat, or starts leaking or flashing error lights, you need a technician who truly understands these systems. Lighthouse HVAC diagnoses and repairs mini-splits quickly and honestly — restoring comfort to the zone that needs it.

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Ductless Mini-Split

MINI-SPLIT REPAIR & TROUBLESHOOTING

Common Mini-Split Problems We Fix

Ductless systems are reliable, but when something goes wrong, they need a technician who knows them well. Whether a zone isn't cooling, water is dripping, or error lights are flashing, our technicians pinpoint the cause and restore performance the right way.

Not Cooling or Heating

Water Leaking From Unit

Blinking Error Lights

Weak or Reduced Airflow

Uneven Temperatures Between Zones

Foul or Musty Odors

Strange Noises

Unit Not Responding

Why the Right Repair Matters

Ductless systems work differently from central HVAC, so they need a technician who understands them. A proper diagnosis protects your comfort, your efficiency, and every zone of your home.

Restored Zone Comfort

Accurate Diagnosis

No Water Leaks or Odors

Longer Equipment Lifespan

Complete System Diagnosis

Clear Diagnosis & Recommendations

Upfront Pricing Approval

Professional Repair & Testing

Comfort Restored

Our Process

What To Expect During Your Repair Visit

Why Homeowners Choose Lighthouse

Experienced Technicians

Highly trained HVAC professionals.

Honest Recommendations

Solutions based on your needs.

Fast Response Times

Prompt scheduling and service.

Long-Term Reliability

Repairs focused on lasting performance.

What Homeowners Are Saying

See why local homeowners trust Lighthouse HVAC for repairs, maintenance, and indoor comfort solutions.

      EXCELLENT  
   Based on 107 reviews 
    
 
 
 
   
 
 
       Posted on Google  
   
   Kevin Brennan 
 
 
 
 Trustindex verifies that the original source of the review is Google. The tech who came out to clear drip line from ac unit was great and very efficient. Would use their service again if needed.  3 text messages for this survey in a week seems a little heavy. Doing this to stop the text messages.
  
 
      Posted on Google  
   
   Kenneth Turner 
 
 
 
 Trustindex verifies that the original source of the review is Google. Excellent service. Great local company
  
 
      Posted on Google  
   
   Natalie Vowell 
 
 
 
 Trustindex verifies that the original source of the review is Google. Amazing work!!! Not only did the fit me in very quickly with same day service, but tech was able to fix my boiler instead of saying immediately (like other companies had) that I needed a new boiler saving me thousands!!
  
 
      Posted on Google  
   
   Mike Phelan 
 
 
 
 Trustindex verifies that the original source of the review is Google. My old heat pump went out in the middle of the summer heat.  Lighhouse came out right away and had me set up with a new heat pump within days.  Ronnie was great.
  
 
      Posted on Google  
   
   Jennifer Karns 
 
 
 
 Trustindex verifies that the original source of the review is Google. What a great company this is. I called at 3:00 on a Friday afternoon and they had a tech in my area who was there at 6. He quickly diagnosed the problem and got us up and running again. Very friendly and professional all around. I highly recommend and will definitely use them in the future.
  
 
      Posted on Google  
   
   James Brown 
 
 
 
 Trustindex verifies that the original source of the review is Google. Worked non stop until it was done and were great to work with. Definitely this is the company to use.
  
 
      Posted on Google  
   
   C Jay 
 
 
 
 Trustindex verifies that the original source of the review is Google. Quick and friendly service! Thanks Lighthouse HVAC!
  
 
      Posted on Google  
   
   Connor Rickard 
 
 
 
 Trustindex verifies that the original source of the review is Google. I HIGHLY recommend this company!  We were desperate, and they came to the rescue after hours so that my kids would be able to sleep in a cool house!  I will use them for my business as well.
  
 
  
  
 
    Verified by Trustindex  Trustindex verified that these reviews were published on Lighthouse HVAC LLC's Google Business Profile. Learn more

Keep Every Zone Trouble-Free

Many mini-split problems — clogged drains, dirty filters, weak airflow — are easily prevented with routine care. The Lighthouse Annual Maintenance Plan keeps every zone clean and running smoothly, catching small issues before they interrupt your comfort, season after season.

Still Have Questions? Let Us Help

Why is my mini-split leaking water?

The most common cause is a clogged condensate drain line, which backs up and drips from the indoor unit. It can also be a dirty filter or a refrigerant issue. It's worth addressing promptly to avoid wall or floor damage — we can clear the line and confirm what caused it.

What do the blinking lights on my mini-split mean?

Flashing lights are error codes that indicate a specific problem — anything from a sensor fault to a communication or refrigerant issue. Each manufacturer uses different codes, so an experienced technician is key. We read the code, diagnose the real cause, and fix it correctly.

Why is my mini-split not cooling or heating?

Common causes include a dirty filter, low refrigerant, a failing sensor, or a blocked outdoor unit. Because mini-splits differ from central systems, proper diagnosis matters. We test the full system to find the exact cause rather than guessing or swapping parts unnecessarily.

Why does my mini-split smell musty?

A musty odor usually means moisture and mildew have built up inside the indoor unit or on the coil — common in humid Maryland summers. A thorough cleaning of the unit and drain system typically clears it up and keeps your air fresh and healthy.

Serving Homeowners Throughout Anne Arundel County

Providing professional mini-split repair and troubleshooting across Annapolis, Severna Park, Crofton, Odenton, Glen Burnie, Arnold, Davidsonville, and surrounding communities.

Mini-Split Acting Up?

Don't let a leak, error code, or dead zone drag on. Schedule your mini-split repair today and get a fast, knowledgeable fix from technicians who truly understand ductless systems.