Kool2U's Max-Kool Auto AC Diagnostic Service Finds The Leaks Auto Repair Shops Miss!
1. Your AC system relies on refrigerant to cool the air. If levels are low then the system cannot produce cold air.
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Usually caused by a leak (not normal loss)
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AC may start cold then turn warm.
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System pressure becomes too lo to function.
Important: Refrigerant does not get used up. If it is low then there is a leak that must be diagnosed.​
Most often this issue is caused by an ac refrigerant (Freon) leak (R12, R134a, or R1234yf). Your cars ac relies heavily on the refrigerant (Freon) to cool the vehicle. Without sufficient ac refrigerant, the other auto ac components will be unable to function. An Auto AC leak can occur at any time but most often it is due to a hole in a connection, ac hoses, ac compressor, ac condenser, or a ruptured ac evaporator. Unlike an oil leak, unfortunately, refrigerant (Freon) leaks are difficult to identify (R12, R134z, or R1234yf). This is because your auto ac refrigerant is meant to evaporate when exposed to the environment.
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2. AC System Leak
Leaks are the root cause of most Auto AC Failures.
Common leak points include:
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Evaporator core (very common and difficult to detect).
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Condenser (front of vehicle)
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Hoses and fittings.
Symptoms:​
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AC works briefly after recharge then fails again.
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Cooling gradually weakens over time.
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3. Compressor Not Engaging
The compressor is responsible for circulating refrigerant.
If it's not turning on:
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The system cannot cool.
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You may hear no click when the AC is turned on.
Possible causes:​
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Low refrigerant triggering safety shutoff
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Faulty relay or fuse
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Failed compressor
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4. Electrical or Sensor Issues
Modern AC systems rely heavily on electronics.
Common problems:
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Faulty pressure switches
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Wiring issues
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Control module faults
These issues are often misdiagnosed without proper testing.​
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5. Cooling Fan or Airflow Problems
If airflow across the condenser is restricted the AC won't cool properly.
Signs:
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AC works while driving but not at idle
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Engine temperature may increase
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Cooling fans not running properly
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Why This Problem Is Worse In New Braunfels?
In New Braunfels:
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High temperatures increase system pressure
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Weak components fail faster
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Small leaks quickly turn into major failures
This is why AC issues are extremely common in South Texas and require proper diagnostics & not guesswork​
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Why Simply Adding Refrigerant Doesn't Fix The Problem
Many shops will:
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Add refrigerant
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Get the AC temporarily cold
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Send you on your way
But if there is a leak or underlying issue the problem will return. It is only a matter of time.​
This lead to:
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Repeated failures
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Wasted money
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Potential damage to other components
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The Correct Way to Diagnose AC Problems
Proper AC repair starts with a full system diagnostic including:
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Leak detection (not just vacuum or pressure testing)
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System pressure analysis
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Electrical system checks
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Component performance testing
Without this process the root cause is often overlooked or missed.​
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Our Approach at Kool2U Auto Repair
At Kool2U Auto Repair we specialize in diagnostic first AC Repair, not guesswork.
We use our proprietary Max-Kool AC Diagnostic Method to:
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Identify hidden leaks (including evaporators)
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Accurately test system performance
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Pinpoint failures other shops miss
This ensures the problem is fixed correctly the first time.​
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How Much Does It Cost To Fix My Car AC?
Costs vary depending on the underlying issue:
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Minor repairs $180 to $400
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Leak repairs $300 to $1,200
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Compressor replacement $800 to $1,500
A proper diagnosis is the only way to determine the exact cost.
Frequently Asked Questions
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Can I drive with my AC blowing warm air?
Yes, but it can lead to further damage if the issue involved the compressor or system pressure.​
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Will adding Freon fix my AC?
In most cases no. If refrigerant is low there is a leak that needs to be repaired first.
How long does an AC diagnosis take?
Kool2U's Max-Kool AC Diagnostic takes between 1 1/2 to 2 hours depending on the issue.
Why does my AC work sometimes and then stop?
This usually indicates a refrigerant issue, pressure imbalance, or electrical fault.
Need an AC Repair In San Antonio, New Braunfels, or Boerne?
If your car AC is blowing warm air don't rely on temporary fixes that end up costing you more in the long run.
Kool2U Auto Repair provides:
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Mobile Mechanic Service or in shop repair
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Long-term solutions, not guesswork.
Schedule a diagnostic and get it fixed right the first time.​
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Patented Auto AC Diagnostic Process That Finds The Leaks Other Shops Miss!
Without Guesswork, Repeat Visits, or Unnecessary Parts Replacement.​
​Developed and tested by our own ASE Master Technician Aaron Burgess with over 30 years in the auto repair industry.
Our Auto AC Leak Detection System finds the leaks the old Auto AC Diagnostic System (developed in the 1950s) miss!
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The MaxKool AC Leak Detection System
A Leap Ahead In Auto AC Leak Detection
Exclusive To Kool2U Auto Repair Service!
Your local auto repair shop and dealership service department use a system for diagnosing your vehicles AC system that was developed in the 1950's. It Involves vacuuming down the refrigerant or freon in your cars AC System. Then injecting oil & dye into the system with nitrogen hoping to "sniff out" or expose the refrigerant leak with a blacklight when the AC system.
So what's the problem?
It produces a kind of hit or miss scenario that tends to find the big leaks but not small, micro leaks in your vehicles AC System. So the obvious leaks in your cars AC system get repaired but it also means that you get to go back & do it all over again in a few days or weeks.
In 2018 most car ac systems switched to R1234yf Refrigerant (Freon). This raised the cost to evacuate and recharge your vehicles ac system up to 10 times higher than the old R134b refrigerant. If your vehicles AC system is an R12 Refrigerant System (70's & 80's) it can be as much as 50X more expensive because it is not produced anymore. It's like finding gold in your grandfather's garage!
What does this mean for you?
Maybe you get lucky the first time. Far too often it means repeated trips to the shop until they find the root in your cars ac system issues.
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Superior AC System Leak Detection
We Don't Throw Parts At It
& Send You Down The Road!
Our MaxKool AC Diagnostic System Finds The Leaks Others Miss!​
We Will Come To You at your home, work, or on the job site. Cars, Trucks, RV's, Semi Trucks, & Heavy Equipment (Cranes, Excavators, Graders, Bulldozers). It can be taken out to fleets of service vehicles such as Firetrucks, Ambulances, School Buses, & more.
Patented & Exclusively
Available at Kool2U!
We had a broken AC in our Jeep and were dreading the hassle of taking time off work and dealing with the usual upselling at repair shops. Kool2U saved us time, money, and stress by sending a professional mobile mechanic straight to our home. The entire job was completed in just one day, right in our driveway.
They were completely transparent with pricing—no hidden fees, no pressure to add unnecessary services like we experienced at the dealership and other shops. The customer service was outstanding, and our technician was amazing—friendly, knowledgeable, and efficient. If you're looking for a trustworthy, convenient, and professional mobile mechanic, Kool2U is the one to call. Highly recommend! Wendy M.
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With A/C their specialty, this company rocks! Extremely fair pricing and used their fantastic mobile tech (Nick) who was professional and quick. One of the owners (Aaron) priced and explained everything and follow up was outstanding. Now I understand why they have so many SOLID reviews. Will use them again and highly recommend them! Steve B.
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Really honest owner and his wife and helpers as well. Owner really took his time in searching for issues on my ac in my 2015 Peterbilt 579. Shop was on it. It was nice to know there are still decent folks around. God fearing family and I’m thinking for their beliefs in Christ Dan M.
Mobile Auto AC Repair In New Braunfels
Kool2U's ASE Certified Auto AC Technicians will come to you in New Braunfels and solve your vehicles AC repair problems.
​Personalized Service
We take the time to get to know you and your vehicle. We then perform a thorough diagnostic to allow you to know all of your options and make an informed decision that works best for you..
Flexibility and Time-Saving
Expertise and Certification
Kool2U Mobile Auto Repair employs our own certified auto repair technicians led by ASE Master Technician Aaron Burgess. We do not use third party, independent mechanics to perform your auto repair service.
Peace of Mind
We Provide an Industry Leading
5 Year/60k Warranty!​
