
Cooling System Repair
Overheating diagnosed, radiator, pump, thermostat
- Price range
- $129–$1,200
- Typical time
- 1–5 hours

$149–$1,600 · 1–5 hours
A sealed system does not lose refrigerant on its own. The check finds where it went, the recharge is weighed in to the gram, and anything bigger than that is a written range you approve first.
All makes, published price ranges, every repair covered for 2-year/24,000-mile
Symptoms
Problem
Warm air, compressor never engages
Likely cause
Low refrigerant tripping the pressure switch, a failed relay, clutch coil or fuse
The fix
Pressures and electrical checked; leak found and repaired, then recharge
Problem
Cool at speed, warm at idle
Likely cause
Condenser fan not running, condenser fins blocked, or a slightly low charge
The fix
Fan and relay test, condenser cleaned, charge corrected by weight
Problem
Compressor cycles every few seconds
Likely cause
Charge low enough to trip the low-pressure switch repeatedly
The fix
Leak search, repair, evacuate and recharge
Problem
Grinding or rattling when the A/C comes on
Likely cause
Compressor bearing or internal failure, clutch worn
The fix
Compressor, drier, expansion valve or orifice and a flush
Problem
Air only from the defrost or the floor
Likely cause
Blend or mode door actuator failed, common on GM and Ford trucks
The fix
Actuator replaced and recalibrated with the tool
Problem
Fan works only on high
Likely cause
Blower resistor or control module failed
The fix
Resistor or module, blower motor if it draws too much current
An automotive A/C system is sealed. If it is low, refrigerant has escaped through a leak, and a top-up without finding the leak is a purchase of refrigerant that will escape again, sometimes in weeks. Worse, air and moisture come in through the same hole and corrode the inside of the system, which is how a small leak turns into a compressor. Federal rules also prohibit knowingly venting refrigerant, so the honest answer to a low system is a leak search, not a can.
The performance check at $99–$149 measures vent temperature, high and low side pressures, compressor engagement and the condenser fan, then injects UV dye and runs an electronic detector over the usual suspects: the condenser at the front of the car, the Schrader valves in the service ports, the hose crimps, the compressor shaft seal and, through the evaporator drain, the evaporator itself. Small leaks sometimes need the dye to circulate for a few days of driving, and the shop tells you that rather than guessing.
Once the leak is found, you get a written range for the repair plus the recharge. If the system is only slightly low after many years and no leak can be found, that is said too, and the recharge is offered on that understanding.
An evacuate and recharge pulls the system into a deep vacuum to boil off moisture, holds that vacuum to prove the system is sealed, then charges the exact weight on the underhood label with the correct oil. On R-134a cars, roughly everything built before 2014 and many through 2017, it runs $149–$249. On R-1234yf, which the newer cars use and which the EPA has required on new light vehicles since the 2021 model year, it runs $249–$399.
The difference is the refrigerant itself. R-1234yf costs several times more per pound, needs its own recovery machine and identifier, and the shop cannot substitute the old gas, because the systems are built differently and the fittings do not match. The label under the hood, or the fittings themselves, tells the technician which one the car takes.
A recharge on a system that is empty is not sold without a leak repair. A recharge on a system that is a little low after ten years, with dye added so a slow leak can be found later, is a reasonable first step and is quoted that way.
The condenser sits in front of the radiator and takes the stones, bugs and construction debris that I-635 and I-20 throw at it. A pinhole in a condenser tube is the most common leak on a Dallas car, and the repair at $450–$900 replaces it with a new drier, because the drier is saturated once the system has been open. On many cars the condenser also contains the drier, which is why some are priced higher.
A compressor is replaced when it is noisy, when its clutch has failed, when it no longer builds pressure, or when it has come apart internally and sent metal through the system. That last case, which technicians call black death, is why a proper compressor job at $800–$1,600 includes the drier or accumulator, the expansion valve or orifice tube and a flush of the lines and condenser; a new compressor installed into a contaminated system fails again, and the manufacturer of the compressor will not warrant it without those parts.
The estimate tells you which it is and why, with the pressures and the leak location recorded. A compressor is not quoted for a car whose only fault is a condenser pinhole.
A surprising share of warm-air complaints are electrical. The compressor clutch relay fails, the pressure switch opens, a fuse blows, the clutch coil goes open-circuit, or on cars with a variable-displacement compressor the control valve stops responding. The blend door actuator that mixes hot and cold air strips its gears on GM trucks, Ford trucks and many Hondas and produces hot air on one side or no change when the temperature is turned. The condenser fan relay fails and the A/C works only at speed.
These are checked during the performance check because they are cheaper than refrigerant work and because charging a system that has an electrical fault proves nothing. A blower motor or resistor at $220–$450 is the usual answer to a fan that works only on high or not at all.
Modern climate control also talks to the engine module, and a failed sensor can shut the compressor off to protect the engine. The brand tool reads the climate module and commands the compressor directly, which turns a guess into a measurement.
A car parked outside in July reaches cabin temperatures far above the air outside, and the A/C has to pull that heat out while the condenser is sitting in front of a radiator that is already working hard. Systems that are slightly low on charge, that have a dirty condenser or a lazy fan, work in April and fail in August. That is why many of the cars that arrive in the first hot week were fine a month before.
The heat also shortens the life of compressor seals and hoses, and it makes the evaporator sweat heavily; a blocked evaporator drain puts that water on the passenger floor. The cabin filter, where fitted, is checked because a clogged one cuts airflow and makes a healthy system feel weak.
Running the A/C for a few minutes every week through winter keeps the compressor seal lubricated, which is the single cheapest thing an owner can do for the system.
Performance and leak check $99–$149; recharge $149–$249 on R-134a or $249–$399 on R-1234yf; condenser $450–$900; compressor with the drier, valve and flush $800–$1,600; blower motor or resistor $220–$450. Inside each range the price moves with the refrigerant type and quantity, the make and model (a dual-zone or rear A/C system holds more and has more parts), access (a condenser behind a bumper and a crash bar takes longer), and whether the system is contaminated.
Every repair is quoted in writing after the check and covered for 2 years parts and 2 years labor, up to 24,000 miles, nationwide. If the system is empty and the leak is in the evaporator behind the dashboard, the estimate says so plainly, because that is the one A/C repair that can cost more than the car on an old vehicle.
Compressors, condensers and driers come from original-equipment suppliers, Denso, Sanden, Valeo, Mahle and the brand's own parts; remanufactured compressors are used only where the rebuilder supplies a nationwide warranty, and a new compressor is always fitted with a new drier or accumulator, the expansion valve or orifice tube and a system flush.
Refrigerant is R-134a or R-1234yf as the vehicle label specifies, charged by weight with the oil type and quantity the manufacturer lists; stop-leak additives are not used because they clog the recovery equipment and the system.
What moves the price: refrigerant type and charge weight, dual-zone or rear systems, access to the condenser, and whether the system needs a flush after a compressor failure.


Pricing
| Service | Price range | Typical time |
|---|---|---|
| A/C performance check with UV dye and electronic leak test | $99–$149 | about 1 hour |
| Evacuate and recharge, R-134a, charged by weight | $149–$249 | 1–1.5 hours |
| Evacuate and recharge, R-1234yf | $249–$399 | 1–1.5 hours |
| Condenser with drier, recharge included | $450–$900 | 2–3 hours |
| Compressor with drier or accumulator, valve or orifice tube, flush and recharge | $800–$1,600 | 3–5 hours |
Dallas independent-shop ranges; the refrigerant type on the underhood label and the location of the leak set the figure, written before the repair starts.
The offer
Risk reversal
Covered for 2 years parts and 2 years labor, up to 24,000 miles, nationwide
No deposit, no card online: you approve the written range before any part is ordered
Published range
$149–$1,600
1–5 hours
Brands
Chevrolet
Silverado and Sierra, Tahoe, Suburban and Yukon, Equinox, Terrain and Traverse
Ford
F-150, Super Duty F-250 and F-350, Explorer and Expedition
Toyota
Camry and Avalon, Corolla, RAV4 and Highlander
Nissan
Altima and Maxima, Sentra and Versa, Rogue and Murano
Kia
Optima and K5, Forte and Rio, Soul
All makes
Mazda and Subaru, Jeep, Ram, Dodge and Chrysler, GMC, Buick and Cadillac
Questions
Evacuate and recharge runs $149–$249 on R-134a cars and $249–$399 on R-1234yf cars, after a $99–$149 performance check that finds where the refrigerant went. A can from a store costs less and solves nothing if the system has a leak, which it does if it needed a can.
The label under the hood says which, and the service port fittings are different sizes. Roughly, cars built before 2014 use R-134a, cars from the 2018 model year onward use R-1234yf, and the years between vary by make and model. The shop has equipment for both and checks the label before connecting anything.
Because a compressor done properly is a system job: the compressor, the drier or accumulator, the expansion valve or orifice tube, a flush of the lines and condenser, the oil, the vacuum and the charge. Skipping those parts to save money is how a new compressor fails inside a year and the warranty on it is refused.
Usually the condenser fan or its relay, a condenser blocked with debris, or a charge that is slightly low. At speed, air through the grille does the fan's job; at a light, nothing does. The performance check tests the fan and the pressures at idle and finds which one it is.
Yes. A musty smell is mould on the evaporator, usually with a clogged drain; the fix is a drain clearing, an evaporator treatment and a new cabin filter where the car has one. It is quoted after the check, and it is separate from any refrigerant work.
A performance check and a recharge on a system with no leak are same-day when a bay is open. A condenser or compressor is usually next-day because the parts come in that morning and the job takes 2–5 hours with the vacuum and charge. Book early in a hot week; the first days above 95 degrees fill the schedule.
Book A/C Repair in Dallas
Car A/C repair in Dallas for any make: performance check with dye and leak test, evacuate and recharge on R-134a and R-1234yf systems, condenser, compressor, blower and electrical repairs, each quoted in writing after the leak is found.