Heat Pump Service in Austin & San Antonio

One System for August and January

Heat pump repair, tune-ups and new installations across Austin, San Antonio and Central Texas, from licensed technicians who work on them in both seasons.

Heat Pumps

Built for a Climate That Is Mostly Summer

A heat pump is an air conditioner that can run in reverse. In summer it moves heat out of the house exactly like a central AC. In winter a reversing valve flips the cycle and it pulls heat out of the outdoor air and brings it inside. Even a 40-degree morning has plenty of heat to move, and moving heat takes far less electricity than making it with a resistance coil. That is why heat pumps fit Central Texas so well: six months of hard cooling, a short winter that rarely stays below freezing for long, and a large number of all-electric homes with no gas line to feed a furnace.

Radiant repairs, maintains and installs heat pumps across Austin, San Antonio and the Hill Country. On the repair side, we know the failures that are specific to these systems: a reversing valve stuck between modes, a defrost board that never cycles, a thermostat wired so the electric backup strips run all winter and quietly double the bill. On the install side, we size from a load calculation, match the indoor and outdoor units, and set up the backup heat correctly so it only runs when it is needed. If your current system is a straight AC with a gas furnace that still has years in it, we will say so; a heat pump is not the right answer for every house.

  • Both seasons, one crew The same technicians handle the cooling calls in July and the heating calls in January, so nothing about your system is unfamiliar.
  • Price first, always An accurate quote before any work, no hidden fees, and no surprise charges for nights, weekends or holidays.
  • Financing on new systems No interest and no payments for 6 months through Service Finance Company, LLC, subject to credit approval.
Radiant technician checking two outdoor heat pump units in a side yard

What to Watch For

Signs Your Heat Pump Needs Attention

Some of these look like problems and are not. Some look minor and are expensive. Here is how to tell.

  • Lukewarm air in heating mode

    Heat pump air is warm, not hot; 90-degree supply air is normal. Air that is cool or room temperature is not. Usually charge, the reversing valve or a defrost fault.

  • Steam off the outdoor unit on a cold morning

    That is the defrost cycle melting frost off the coil. Normal, and it lasts a few minutes. A unit that is a solid block of ice for hours is not normal.

  • A winter electric bill that jumped

    The backup heat strips are running more than they should. A thermostat setting, a failed outdoor sensor or a heat pump that is not keeping up.

  • Cools fine, will not heat, or the reverse

    The reversing valve is stuck or its solenoid has failed. One of the few faults that is specific to a heat pump.

  • A whoosh or hiss when it changes modes

    A brief swoosh at the start of defrost is normal. Loud, repeated or constant noise from the valve or compressor is worth a call.

  • Short cycling in either season

    Starting and stopping every few minutes wears the compressor and points at airflow, charge, a control fault or a system that is oversized.

What We Do

Heat Pump Repair, Tune-Ups and Installation

The same outdoor unit does two jobs, and we service both.

Radiant technician greeting a homeowner at the door for a heat pump service visit
Heat pump repair, tune-ups and installation.
  • Reversing valves and defrost controls The parts that make a heat pump a heat pump. Diagnosed with the valve and sensors tested, not swapped on a guess.
  • Backup heat strips Electric resistance strips that should run rarely. We test them, check the sequencer and make sure the thermostat only calls for them when the heat pump cannot keep up.
  • Capacitors, contactors and motors The same outdoor components a central AC has, working twelve months a year instead of six.
  • Refrigerant charge and leaks Charge verified by measurement in the correct mode for the season, and leaks found and fixed rather than topped off.
  • Seasonal tune-ups Spring and fall visits through Care Club, with the defrost cycle and backup heat checked before the first cold front.
  • New heat pump installation Sized from a load calculation, matched indoor and outdoor units, and a manager’s quality review on installs over $3,000.

How It Works

What a Heat Pump Service Call Looks Like

Whether it is a repair in January or a replacement quote in May, the steps are the same.

  1. Tell us the season and the symptom

    Not heating, not cooling, a high bill, ice on the unit. It helps to know whether the thermostat is showing “aux” or “emergency heat”.

  2. We test in the right mode

    Refrigerant pressures, the reversing valve, defrost controls, the outdoor sensor and the backup strips, checked the way the system is actually running.

  3. You approve the price

    The fault, the fix and the cost in writing, honored for 72 hours. If it is a replacement conversation, the options are priced side by side.

  4. Repair or install, then verify

    We run the system in both modes before we leave, so you are not finding out in the next season that something was missed.

Heat Pump Not Keeping Up?

Licensed technicians, 24/7, with the price agreed before any work starts.

What Our Customers Say

Don't just take our word for it — hear from our satisfied customers

C Claudia H.
Claudia H. 3 years ago
★★★★★
Our 18 year old HVAC system finally gave out this past week, so we reached out to Radiant to see what could be done. They sent a tech out named Bryan the same day, and he did a great job looking over the entire HVAC system. He was friendly and helpful in explaining everything that he saw, and our options moving forward. We decided to replace the entire system, so we met with Jacob (same day thankfully) to find the best HVAC system for our needs. Jacob was friendly, professional, and did a great job explaining the different options on offer. Radiant was able to set-up next day install, which was much appreciated, because the temps were still going to be cold in the coming days.

The install team consisted of Carlos and Pablo, who were very courteous and professional, and were kind enough to answer any questions I had regarding the install. They did a great job installing our new HVAC system, and were tidy which is always appreciated! Before they left, they explained everything that had been done, and showed me photos of the work.

Our entire experience from start to finish was great. I appreciate that they send photos of who is coming to your home too. Friendly, kind, professional team members, and good work all the way around. Thanks Radiant!
R Renee Mayer
Renee Mayer 3 years ago
★★★★★
This is the first time I’ve used radiant my neighbor recommended them…. I called them today and they set me up an appointment on the same day. I was totally shocked at that and the service call was only $39!!…. Highly recommend them Danielle showed up and he was a great guy and he put up with all my wishy-washiness and I had to hurry him because I was heading to church and he got caught in a lot of traffic getting here he even would’ve installed the part that broke but I Didn’t have the time tonight….. He was patient with me and just told me to call the office first thing in the morning and get a service call set up…. Thank you so much Radiant!!….
With another cold front coming in tomorrow now I just hope they can get me scheduled for a separate call tomorrow but I have a feeling they will. They are such a great company!!😊😊
A Art
Art 5 years ago
★★★★★
Alex performed the winter service on my unit. This business along with Alex, are very professional and upfront about everything. To be transparent, this is the maintenance included with the purchase of a unit from them. I was informed about everything to include pictures as proof. I was told that my unit is 100% and very clean and again pictures to prove it. I was reccomended this business by a friend and glad he did. The initial purchase experience was also amazing. I had contacted 5 other businesses to get quotes about a new unit as my upstairs unit failed. 2 were outrageous quotes and I am technically still waiting on the other 3. On every instance of getting a quote, I waited about 1 week. Luckily my house has two units but still, un acceptable especially during the summer. I guess they all had so much business they did not care for mine. When I called this business not only did they come out the same day, I had the new unit installed with in 48 hrs. Oh and let's not forget the quote they gave me was the lowest of all. I can say enough good things about this business. Keep up the great work.

Maintenance Membership

Join the Care Club

Home maintenance for $9.99 a month.

Care Club members get two HVAC tune-ups and a plumbing safety inspection every year, priority scheduling, no dispatch fees — ever — and 5% off every repair.

  • Priority scheduling
  • Seasonal HVAC tune-ups
  • Annual safety inspection
  • Exclusive member discounts
  • Free dispatch on repairs
  • No long-term contracts

Heat Pump Questions

Does a heat pump make sense in Central Texas?

For most homes, yes, and especially for all-electric homes. A heat pump is at its best in a climate with a long cooling season and a mild winter, which describes Austin and San Antonio well. In summer it performs exactly like a central air conditioner. In winter it heats efficiently on the great majority of our days, and electric backup strips cover the handful of nights that drop well below freezing. If your house already has a gas furnace in good shape, the math is different: a straight AC paired with that furnace, or a heat pump set up as a dual-fuel system with the furnace as backup, may be the better fit. We will look at your house and your utility situation and tell you which.

Why is my heat pump blowing cool air in heating mode?

First, know what normal is. Heat pump supply air is typically in the 85 to 95 degree range, which feels lukewarm against your skin compared to a gas furnace, even though it is warming the house fine. Second, the system runs a defrost cycle on cold, damp mornings, during which it briefly switches to cooling mode to melt frost off the outdoor coil; the backup strips should cover that gap. If the air is genuinely cool for more than a few minutes, or the house is losing ground, the likely causes are a low refrigerant charge, a reversing valve stuck in cooling, a failed defrost board or outdoor sensor, or backup strips that are not coming on. Those need a technician.

What is the “aux heat” or “emergency heat” setting on my thermostat?

Both refer to the electric resistance strips inside your air handler. “Aux” (auxiliary) heat comes on automatically when the heat pump cannot keep up on its own, usually on very cold mornings or when you raise the setpoint several degrees at once. That is normal, and it should switch off once the heat pump catches up. “Emergency heat” is a manual setting that shuts the heat pump off entirely and runs only the strips. It is meant for when the outdoor unit has failed and you are waiting on a repair. Leaving it on by mistake, or having a thermostat wired to call for strips too early, is one of the most common reasons we see for a winter electric bill that suddenly doubled.

Do heat pumps work during a hard freeze like February 2021?

A heat pump keeps producing heat well below freezing, though with less capacity as the temperature falls, and the backup strips make up the difference. On a normal Central Texas cold snap that is more than enough. What February 2021 taught everyone is that no system heats a house without electricity: heat pumps, electric furnaces and gas furnaces all need power for the blower and controls. If a long outage is your concern, the honest answer is that it is a power question more than an equipment question. What we can do is make sure your defrost controls and backup strips are working before winter, so that when the power is on, the house is warm.

How long does a heat pump last?

Ten to fifteen years is a reasonable expectation in Central Texas, with maintenance being the biggest variable. A heat pump runs year-round, so it accumulates hours faster than a straight air conditioner that sits idle every winter, and our summers already put more hours on cooling equipment than most of the country. Two tune-ups a year, one before cooling season and one before heating season, are what keep a system at the far end of that range. Care Club schedules both for $9.99 a month. When a compressor fails on a unit past its twelfth year, we will usually show you the replacement number next to the repair, because at that point it is often the smarter spend.

*Offers cannot be combined with other promotions or applied to dispatch fees. No cash value. Must present offer at time of service. Call for details.
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