Heat pump repair in the Charleston, SC area

Heat Pump Repair Relief In The Lowcountry

Live comfortably again with professional heat pump repair services in Charleston.

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My Three Sons HVAC provides honest, family-owned heat pump repair in Charleston, SC and throughout the Lowcountry. Because heat pumps run nearly year-round in Charleston’s mild climate, problems like a heat pump not heating, not cooling, stuck in defrost, frozen outdoor coils, or a unit that won’t turn on are common. A licensed technician (SC License CLM.117596) diagnoses the issue — reversing valve, defrost control, capacitor, refrigerant charge or compressor — and gives you upfront options first. Call (843) 353-3135 to get relief.

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Local Heat Pump Repair In Charleston, SC

Our licensed team (SC License CLM.117596) has 30 years of hands-on heat pump repair experience across the Charleston Lowcountry. Every visit reflects our core values — honesty, integrity and kindness — and the straight, no-pressure advice we’d give our own family.

Heat pump repair in Charleston, SC starts with a full diagnosis, then an honest quote before any work begins. Because a heat pump both heats and cools, it runs almost all year in the Lowcountry — so when it stops keeping up, you feel it fast. If your heat pump isn’t heating, isn’t cooling, is frozen over, or won’t turn on, My Three Sons HVAC will find the real cause and get your home comfortable again. Local, family-owned, no pressure.

Signs Your Heat Pump Needs Repair

Call for heat pump repair in Charleston if you notice any of these:

The heat pump runs but the air isn’t warm in winter or cool in summer
The outdoor unit is covered in ice and won’t defrost
The system runs constantly but never reaches the set temperature
It won’t turn on at all, or trips the breaker
Loud grinding, buzzing or clanking from the outdoor unit
The unit is stuck running auxiliary/emergency heat (and your bill jumps)
Short cycling — turning on and off every few minutes

My Three Sons Bike Kids | Stay Cool. Be Kind.

Common Heat Pump Problems We Repair

Heat Pump Not Heating or Not Cooling

When a heat pump won’t switch modes correctly, the culprit is often the reversing valve, a low refrigerant charge, or a faulty thermostat or sensor. We test the whole system to find why it isn’t heating or cooling — not just guess.

Frozen Outdoor Unit & Defrost Problems

A light frost on the outdoor coil in winter is normal; a fully iced-over unit is not. A failed defrost control, sensor, or reversing valve keeps the unit frozen and starves your home of heat. We repair the defrost cycle so the system protects itself the way it should.

Won’t Start, Capacitor & Compressor Issues

A heat pump that won’t turn on usually points to a capacitor, contactor, or wiring fault before it points to the compressor. We repair the affordable electrical parts first and only discuss compressor or replacement options when it’s truly warranted.

Stuck on Auxiliary / Emergency Heat

If your system leans on backup electric heat when it shouldn’t, your power bill climbs fast. We find out why the heat pump isn’t carrying the load and fix the root cause.

How Much Does Heat Pump Repair Cost in Charleston?

Most heat pump repairs in the Charleston area run about $150–$700, depending on the component. Capacitors, contactors and sensors are on the low end; reversing valves, defrost boards and refrigerant work are higher. We diagnose first and give you a clear, upfront price so you can decide with confidence.

Repair or replace your heat pump?

Repair when the unit is under ~10 years old and the fix is a fraction of a replacement.

Consider replacement at 12–15+ years, on R-22 refrigerant, or when a major part (like the compressor) fails.

We’ll tell you honestly which makes more sense for your home and budget.

Professional Heat Pump Repair

If your heat pump pushes air through ductwork and something isn’t right, our team will troubleshoot and restore your central air conditioning back to normal operation.

Ductless Mini Split Air Conditioning Services

Professional Ductless Heat Pump Repair

Ductless heat pump issues are not fun to deal with on you own. Our team will troubleshoot and get your ductless heating and cooling solution back up and running again.

Our Guarantee & What to Expect

When you book heat pump repair with My Three Sons HVAC, you get a full diagnosis and a clear, upfront price before any work begins — no surprises and no pressure. We stand behind every repair.

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See What Our Customers Say About Us!

      EXCELLENT  
   Based on 226 reviews 
    
 
 
 
   
 
 
       Posted on Google  
   
   Letsy1 
 
 
 
 Trustindex verifies that the original source of the review is Google. My Three Sons have been a great company for years. They are our immediate call whenever we have any HVAC issues. We recently had our entire HVAC system replaced, Travis was great explaining everything to us and his team did an awesome job on the install. Everything works great and the team did an awesome job cleaning up and protecting my floors with carpet protectors. Highly recommend for anyone to get great customer service and quality work.
  
 
      Posted on Google  
   
   Andrew Nesselroade 
 
 
 
 Trustindex verifies that the original source of the review is Google. GREAT COMPANY - THEY PROVIDED AN HONEST ASSESSMENT OF WHAT OUR HOME NEEDED FOR MORE EFFICIENT AC AFTER YEARS OF IT STRUGGLING TO KEEP UP WITH SUMMER HEAT & UPDATED OUR SYSTEM FOR A VERY REASONABLE PRICE. HOME IS NOW MORE COMFORTABLE THAN IT EVER HAS BEEN!!

After over a year of having other AC repair company nickel and dime me with expensive repairs that never improved our AC & ultimately recommended a very expensive upgrade because they "couldnt figure it out and our system was just too small", I finally reached out to this company for a second opinion

They came and provided an assessment & pointed out basic issues with our old system and poor maintenance practices from the other company - and also recommended we not just get a bigger system. They ultimately recommended replacing old system but focusing on improving the airflow for significantly less than the other company

Trusting this company ended up being a really good decision - for the first time in 4 years our home AC is now capable of keeping up in the heat of summer, the airflow is significantly better and - this is a little thing but its the little things that matter and make great companies stand out from the good ones - they cleaned our attic so well after the installation that it looks better than it ever did before. HIGHLY RECOMMEND REACHING OUT TO THIS COMPANY, THEY ARE HONEST & CLEARLY REALLY CARE ABOUT WHAT THEY DO.
  
 
      Posted on Google  
   
   Creighton All 
 
 
 
 Trustindex verifies that the original source of the review is Google. Very fast. Very friendly. Very professional.  Will definitely use again.
  
 
      Posted on Google  
   
   cheri zetrouer 
 
 
 
 Trustindex verifies that the original source of the review is Google. Willy is great! He was extremely pleasurable and professional. He had the unit running in a short period of time, explained exactly what the issue was and hung around to ensure the AC was properly functioning. We will definitely call My Three Son’s for any future needs.
  
 
      Posted on Google  
   
   Jacqueline Cox 
 
 
 
 Trustindex verifies that the original source of the review is Google. Willie was very professional and went above and beyond in conducting yearly maintenance on our unit. Willie discussed everything he was doing to our unit with pictures in detail to easily explain how our system was working.
Signed up for yearly maintenance plan with 3 Sons and would highly recommend 3 Sons HVAC
Would highly recommend for all HVAV work/ maintenance.
  
 
      Posted on Google  
   
   Emily Burrous 
 
 
 
 Trustindex verifies that the original source of the review is Google. Always professional. Like that they tell you who is coming and give a picture and background information.
  
 
      Posted on Google  
   
   Robert Murphy 
 
 
 
 Trustindex verifies that the original source of the review is Google. We needed a complete replacement of our duct work, and My Three Sons were outstanding. Travis was professional, polite, and prompt in all communications, including text and email. The crew was organized and courteous and tried to leave a minimal footprint around the house. The job was done well and priced very fairly. I would highly recommend this group for any HVAC work in our area.
  
 
      Posted on Google  
   
   Carl Fitzgerald 
 
 
 
 Trustindex verifies that the original source of the review is Google. My Three Sons is a fantastic family-owned HVAC company. I have used them for 2 of my properties. They are always prompt, responsive, and easy to work with. Very professional work and fair pricing. Most recently, over Labor Day weekend they were able to show up within an hour of me calling on a late Sunday afternoon (holiday weekend) to address an issue with my tenant’s split units. True customer service! I always try and use local, absolutely recommend them to anyone in Charleston.
  
 
      Posted on Google  
   
   David Hartman 
 
 
 
 Trustindex verifies that the original source of the review is Google. I had a service call this morning.   Willy was the technician and he was amazing.   Beyond thorough and a true professional.   I never do these reviews, but this company is outstanding.    I paid much less than expected for the time spent in my house (and in the crawl space!)    They were on time, wore booties, etc.   This may be my first and only five star review.   It’s nice to know these companies still exist!
  
 
      Posted on Google  
   
   Kalyn Reim 
 
 
 
 Trustindex verifies that the original source of the review is Google. It's well worth the cost of Membership!!! Thank you for taking great care of my home and environment. 😀
  
 
  
  
 
     Verified by Trustindex  Trustindex verified badge is the Universal Symbol of Trust. Only the greatest companies can get the verified badge who has a review score above 4.5, based on customer reviews over the past 12 months. Read more

Common FAQs About Heat Pump Repair

1Why is my heat pump not heating (or not cooling)?

A heat pump that won’t heat or cool properly often has a faulty reversing valve, a low refrigerant charge, or a bad thermostat or sensor. A licensed technician can test the system and pinpoint the exact cause rather than guessing.

2Why is my heat pump frozen over?

Light frost in winter is normal, but a fully iced outdoor unit usually means a failed defrost control, sensor, or reversing valve — or low refrigerant. Turn the system to emergency heat to protect it and call for repair.

3How much does heat pump repair cost in Charleston?

Most heat pump repairs in the Charleston area run about $150–$700 depending on the part. Electrical components are on the low end; reversing valves, defrost boards and refrigerant work are higher. We give an upfront price after diagnosis. We wont know exactly until we are able to look at the system.

4Why does my heat pump keep running on emergency heat?

If your system relies on auxiliary/emergency heat when it shouldn’t, the heat pump isn’t carrying the load — often a refrigerant, defrost, or control issue. It drives your power bill up, so it’s worth diagnosing promptly.

5Do you repair heat pumps across the Charleston area?

Yes — we provide residential heat pump repair throughout the tri-county area, including Charleston, North Charleston, Mount Pleasant, Summerville, Goose Creek, Hanahan, Daniel Island, West Ashley and the islands.

My Three Sons HVAC Around The Lowcountry

We love working in the Lowcountry and keeping Charleston area families cool & comfortable year round.

Why My Three Sons Heating & Air?

Heat pump repairs aren't projects you want to take on yourself (DIY).

Built upon our core values of honesty, integrity and kindness, we aim to be your trusted, local heat pump repair specialists and all of your residential heating and air conditioning needs.

We’d love to help you with your heat pump repair in the Charleston area.

Call us today and we’ll help get you living more comfortably again in the Lowcountry.