Ductless Mini Split Repair in San Jose, CA

Here at Sandium Heating and Air Conditioning, we understand the annoyance of having HVAC troubles and are there to assist you with quick, quality ductless mini-split repair in San Jose, CA.

A ductless mini-split is an excellent option for maintaining year-round comfort in your home, but when it begins malfunctioning, it is no longer fun. If your system is failing to heat and cool as intended, producing odd noises, or turning off prematurely, it's time to contact a professional.

Ductless Mini-Split Issues We Troubleshoot and Repair

Mini-splits are intricate systems, and even minor trouble can hamper performance. Our skilled professionals are trained in performing even the most sophisticated repairs, and we're experts in detecting and resolving issues such as:

  • Refrigerant Leaks – Low refrigerant causes your system to have to work overtime and can mean larger issues.
  • Electrical Malfunctions – Malfunctioning wiring, faulty sensors, or broken components can lead your unit to suddenly shut off.
  • Blower Motor Malfunctions – Dying airflow or airflow at all? That might spell disaster for the blower motor.
  • Compressor Issues – When your system's not heating or cooling like it should, a malfunctioning compressor might be the culprit.
  • Drainage Problems – Blocked drain lines may result in water leaks, moisture issues, or even mold development.

We're familiar with these systems like the back of our hand and take the time to repair the cause of the problem, not just the symptom, so you won't have to worry about experiencing the same issue again.

Warning Signs Your Mini-Split Needs Repair

Not certain if your mini-split requires professional service? Here are some warning signs to watch for:

✔️ Unbalanced temperatures – Too hot in one room, too cold in another, despite unaltered settings.

✔️ Unusual noises – Grinding, buzzing, or hissing indicate that something's amiss.

✔️ Short cycling – Constantly turning off and on again indicates trouble with the compressor, thermostat, or airflow.

✔️ Higher energy bills – A sudden spike in your bill could mean your system is struggling to keep up.

✔️ Bad odors – Musty or burning smells coming from your unit could indicate mold or electrical issues.

If you’re noticing any of these issues, it’s best to get them checked out before they turn into bigger (and more expensive) problems.

Why Choose Sandium Heating and Air Conditioning?

We at Sandium Heating and Air Conditioning pride ourselves on delivering excellent HVAC service supported by mechanical engineering know-how. That is, we're not merely repairing issues—we're resolving them with accuracy and attention to detail. When you request ductless mini-split repair from us, you can look forward to:

✅ Complete diagnostics – We don't speculate—we employ state-of-the-art equipment to identify the problem.

✅ Professional technicians – Our technicians are trained to handle all major mini-split brands.

✅ Transparent pricing – No surprise fees or charges—just straightforward, upfront pricing.

✅ Quick turnaround – We know a malfunctioning mini-split is an inconvenience, so we work efficiently to get things back on track.

✅ Durable repairs – Quality workmanship and long-lasting solutions are our top priority.

We understand how important it is to have a comfortable home, and we’re committed to getting your mini-split running smoothly again.

Frequently asked questions

Everything you need to know about and how we can help.

How does a ductless mini-split differ from a central HVAC system?

Unlike central HVAC systems, ductless mini-splits do not require ductwork, making them ideal for areas where traditional ducts are impractical. They offer individual room control for personalized comfort.

Can a ductless mini-split system heat and cool my home?

Yes, ductless mini-split systems provide both heating and cooling, making them a versatile solution for year-round comfort in all types of spaces.

What is the maintenance required for a ductless mini-split system?

Regular maintenance includes cleaning or replacing filters, inspecting the outdoor unit for debris, and professional servicing to ensure optimal performance and efficiency.

Don't just take our word for it

Our satisfied customers are our biggest advocates. Don't just take our word for it – hear what they have to say about their experience with Sandium.

Marcos, Carlos, & Pat did a really solid and thorough installation job (HERS leakage numbers are almost negligible).
Lisa Rose

Lisa Rose

Posted on
Came to repair a water heater and replace the damaged element. Friendly people, reasonable cost, and excellent quality of work.
Camila Mata

Camila Mata

Posted on
Very quick to respond to initial quotes and easy to deal with. Great job with install, better price than others.
Tyler White

Tyler White

Posted on
They figured out the problem and got the furnace up and running very quickly.
Isaiah Jenkins

Isaiah Jenkins

Posted on
The team from Sandium Heating and Air Conditioning was wonderful to deal with. He also offered common sense advice to ensure our system was up and running perfectly and the problem didn't reoccur.
Tyler Anderson

Tyler Anderson

Posted on
They are very professional, timely, personable and knowledgeable and their prices are reasonable.
Jean Schmidt

Jean Schmidt

Posted on
They are prompt and have a very reasonable pricing. Any issues get resolved the same day or the next, utmost.
Toni Lumpkin

Toni Lumpkin

Posted on
Excellent service from start to finish. Was professional. The team take real pride in their work and always offer advice and recommendations.
Schneider Katy

Schneider Katy

Posted on
Sandium Heating and Air Conditioning did a great job repairing our AC system. Friendly, tidy and a very neat job. Really pleased with the approach they took and kept us up to date.
Alax Alisha

Alax Alisha

Posted on
Did an amazing job, professional, friendly service. I didn't expect it to be so fast. In half a day I had my new heat/air up and running.
Larry Siegel

Larry Siegel

Posted on
My first inquiry about 40C Heatwave resulted in installers coming and installing a split air con system in a double bedroom within a day. They worked tirelessly and I am very pleased with the installation.
Gianna Estes

Gianna Estes

Posted on
Marcos, Carlos, & Pat did a really solid and thorough installation job (HERS leakage numbers are almost negligible).
Lisa Rose

Lisa Rose

Posted on
Came to repair a water heater and replace the damaged element. Friendly people, reasonable cost, and excellent quality of work.
Camila Mata

Camila Mata

Posted on
Very quick to respond to initial quotes and easy to deal with. Great job with install, better price than others.
Tyler White

Tyler White

Posted on
They figured out the problem and got the furnace up and running very quickly.
Isaiah Jenkins

Isaiah Jenkins

Posted on
The team from Sandium Heating and Air Conditioning was wonderful to deal with. He also offered common sense advice to ensure our system was up and running perfectly and the problem didn't reoccur.
Tyler Anderson

Tyler Anderson

Posted on
They are very professional, timely, personable and knowledgeable and their prices are reasonable.
Jean Schmidt

Jean Schmidt

Posted on
They are prompt and have a very reasonable pricing. Any issues get resolved the same day or the next, utmost.
Toni Lumpkin

Toni Lumpkin

Posted on
Excellent service from start to finish. Was professional. The team take real pride in their work and always offer advice and recommendations.
Schneider Katy

Schneider Katy

Posted on
Sandium Heating and Air Conditioning did a great job repairing our AC system. Friendly, tidy and a very neat job. Really pleased with the approach they took and kept us up to date.
Alax Alisha

Alax Alisha

Posted on
Did an amazing job, professional, friendly service. I didn't expect it to be so fast. In half a day I had my new heat/air up and running.
Larry Siegel

Larry Siegel

Posted on
My first inquiry about 40C Heatwave resulted in installers coming and installing a split air con system in a double bedroom within a day. They worked tirelessly and I am very pleased with the installation.
Gianna Estes

Gianna Estes

Posted on
4.9 out of 5 from 127 reviews on
Service Area

Areas we service

Atherton, Campbell, Cupertino, Hillsborough, Los Altos Hills, Los Altos, Los Gatos, Mountain View, Palo Alto, Portola Valley, Redwood City, San Carlos, San Jose, Santa Clara, Saratoga, Sunnyvale, Woodside

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