When the air conditioning stops working in a semi truck, commercial truck or fleet vehicle, downtime costs money.
Kool2U provides professional mobile semi truck AC diagnostics and repair throughout San Antonio, New Braunfels, Boerne and surrounding areas.
​
Our technicians can come to your truck yard, terminal, business, jobsite or other service location to diagnose many cab AC problems without requiring the truck to spend unnecessary time at a repair facility.
​
Semi Truck AC Blowing Warm Air Or Not Working?
Have the truck make, model, approximate year and location available when you call.
​
Semi Truck AC Repair That Comes to Your Truck
Commercial trucks need to stay on the road.
Kool2U brings professional AC diagnostic equipment and repair capability to the truck when mobile service is appropriate.
Mobile service can help reduce:
• Driver downtime
• Trips to a truck repair facility
• Time spent waiting for diagnosis
• Fleet scheduling disruptions
• Unnecessary parts replacement
• Lost revenue from trucks sitting out of service
For fleet operators, multiple trucks may also be serviced at the same yard or facility when scheduling allows.
​
Semi Trucks & Commercial Trucks We Service
Kool2U provides AC diagnostics and repair for many commercial vehicles, including:
• Class 8 semi trucks
• Day cabs
• Sleeper tractors
• Box trucks
• Delivery trucks
• Service trucks
• Bucket trucks
• Utility trucks
• Medium duty commercial trucks
• Fleet vehicles
• Selected emergency and specialty vehicles
If you are unsure whether we can service your truck, call 210 374 5727 with the make, model and location.
​
Semi Truck Brands We Work With
Kool2U services HVAC systems on many major truck brands, including:
• Freightliner
• International
• Kenworth
• Peterbilt
• Mack
• Volvo
• Western Star
• Hino
• Isuzu
• Ford commercial trucks
• RAM commercial trucks
• Chevrolet and GMC commercial trucks
• And other supported commercial vehicles
Truck HVAC systems vary significantly by model and configuration, so provide the model information when scheduling service.
​
Semi Truck AC Problems We Diagnose
Commercial truck AC systems operate for long hours and are exposed to heat, vibration, dirt and demanding operating conditions.
Kool2U diagnoses problems including:
• Cab AC blowing warm or hot air
• AC that cools intermittently
• Weak airflow
• AC cold while driving but warm at idle
• Refrigerant leaks
• Compressor problems
• Condenser failures or damage
• Evaporator leaks
• Expansion valve problems
• Blower motor failures
• Electrical problems
• Failed relays and switches
• Pressure sensor problems
• Wiring and connector damage
• HVAC control problems
• Unusual noises
• Repeated refrigerant loss
​
Diagnose the Problem Before Replacing Parts
Warm air does not automatically mean the truck needs a compressor.
Repeated refrigerant loss should not be treated by simply adding refrigerant over and over again.
Kool2U uses a diagnostic first approach to determine why the cab AC is not cooling properly before recommending repairs.
Testing may include:
• High and low side pressure testing
• Refrigerant leak detection
• Temperature testing
• Compressor operation testing
• Electrical circuit testing
• Blower and airflow testing
• Control circuit diagnosis
• Condenser airflow evaluation
• Inspection of hoses, fittings and components
The goal is to identify the cause rather than guess based only on symptoms.
​
Proprietary Semi Truck AC Leak Detection
Refrigerant leaks are one of the most common causes of poor AC performance.
Semi trucks can develop leaks in locations that are difficult to identify using basic inspection alone.
Kool2U uses its proprietary AC diagnostic and leak detection process to help identify refrigerant leaks before repairs are made.
Possible leak locations include:
• AC hoses
• Hose crimps
• O rings and fittings
• Compressor seals
• Condensers
• Evaporators
• Service ports
• Expansion valves
• Refrigerant connections
Finding the actual source of refrigerant loss helps reduce repeat repairs and unnecessary downtime.
​
Semi Truck AC Recharge & Refrigerant Service
If a truck is low on refrigerant, Kool2U evaluates the system to determine why.
Depending on the truck and system, service may include:
• Refrigerant recovery
• Vacuum testing
• Leak testing
• Proper refrigerant recharge
• Pressure testing
• Temperature testing
• Verification of AC performance
Kool2U services supported R134a, R1234yf and other applicable mobile AC systems using the proper equipment and procedures for the vehicle.
​
Semi Truck AC Compressor Diagnosis
Compressors can be expensive, especially on commercial trucks.
Before recommending compressor replacement, Kool2U evaluates the system to determine whether the compressor has actually failed or whether another issue is preventing proper operation.
Possible causes include:
• Low refrigerant
• Refrigerant leaks
• Electrical faults
• Compressor clutch or control problems
• Pressure sensor failures
• Restricted refrigerant flow
• Condenser airflow problems
• Internal compressor failure
Accurate diagnosis can prevent replacing an expensive compressor unnecessarily.
​
Semi Truck AC Electrical Diagnostics
Modern commercial truck HVAC systems use electrical controls, sensors, relays and modules.
Sometimes the AC system has the correct refrigerant charge but still does not operate because of an electrical problem.
Kool2U can diagnose:
• Compressor power and control circuits
• Relays and fuses
• Pressure switches and sensors
• Blower motor circuits
• Wiring damage
• Connector problems
• Ground faults
• HVAC control problems
• Intermittent electrical failures
Learn more about advanced electrical diagnostics.
​
Cab AC Is More Than Driver Comfort
South Texas heat can make an inoperative truck AC system more than an inconvenience.
Drivers may spend hours inside the cab every day, including long periods at low speed or idle.
A properly operating HVAC system can help:
• Keep drivers more comfortable
• Reduce fatigue caused by excessive heat
• Improve working conditions
• Keep fleet trucks available for service
• Reduce driver complaints and scheduling disruptions
For commercial fleets, getting AC problems addressed quickly can become an operational issue as much as a repair issue.
​
Fleet Semi Truck AC Service
Kool2U works with companies operating multiple trucks and commercial vehicles.
When practical, multiple trucks can be inspected or serviced during the same scheduled visit.
Fleet service may be useful for:
• Transportation companies
• Delivery fleets
• Construction companies
• Service companies
• Utility fleets
• Municipal fleets
• Commercial vehicle operators
• Owner operators with multiple trucks
Learn more about fleet and commercial vehicle repair.
​
Reduce Commercial Truck Downtime
Commercial vehicles generate revenue when they are working.
Mobile AC service can eliminate unnecessary trips to a repair facility for many HVAC problems.
Kool2U's goal is to:
• Diagnose the problem accurately
• Identify the correct repair
• Reduce unnecessary parts replacement
• Reduce repeat service visits
• Minimize time the truck is unavailable
​
Why Truck Owners & Fleet Managers Choose Kool2U
• Mobile service at your truck yard or business
• ASE certified technicians
• Led by an ASE Master Technician
• More than 30 years of automotive diagnostic and repair experience
• Advanced AC diagnostics
• Proprietary AC leak detection process
• Advanced electrical diagnostic capability
• Commercial fleet experience
• Full service San Antonio repair facility
• Hundreds of Google reviews
• Service throughout San Antonio and surrounding communities
​
Semi Truck AC Repair in San Antonio
Kool2U provides mobile semi truck AC diagnostics and repair throughout San Antonio and surrounding communities.
Primary service areas include:
• San Antonio
• New Braunfels
• Boerne
• Bulverde
• Spring Branch
• Schertz
• Cibolo
• Seguin
• Canyon Lake
• Bandera
• Hondo
• La Vernia
• Surrounding South Central Texas communities
Additional mileage charges may apply depending on location.
​
Semi Truck AC Repair in New Braunfels
Kool2U provides mobile semi truck and commercial truck AC service throughout New Braunfels and surrounding areas. Mobile service can allow trucks to be diagnosed and repaired at a business, yard or other service location rather than taking the truck out of operation for an unnecessary trip to San Antonio.
​
Semi Truck AC Repair in Boerne
Kool2U also provides mobile commercial truck and semi truck AC service throughout Boerne and surrounding Hill Country communities.
Call with the truck information and location to confirm service availability.
​
Heavy Equipment AC Repair
Kool2U also specializes in mobile HVAC diagnostics and repair for construction and heavy equipment.
​
Frequently Asked Questions
Do you come to our truck yard for semi truck AC repair?
Yes. Kool2U provides mobile semi truck AC diagnostics and many AC repairs at truck yards, commercial facilities, jobsites and other supported service locations.
What semi truck brands do you work on?
Kool2U works on HVAC systems found in many Freightliner, International, Kenworth, Peterbilt, Mack, Volvo, Western Star and other commercial trucks.
Can you find AC refrigerant leaks in semi trucks?
Yes. Kool2U specializes in AC diagnostics and uses a proprietary leak detection process to help identify refrigerant leaks before repairs are recommended.
Do you repair electrical AC problems on semi trucks?
Yes. AC failures may involve relays, switches, sensors, wiring, blower circuits, compressor controls and other electrical components.
Can you recharge a semi truck AC system?
Yes, when appropriate. Kool2U evaluates the system first because refrigerant loss usually indicates a leak or another problem that should be diagnosed before simply adding refrigerant.
Can you service multiple fleet trucks at the same location?
Yes, depending on the work required and scheduling. Kool2U can service multiple commercial vehicles at fleet yards and business locations.
Do you provide semi truck AC repair in New Braunfels and Boerne?
Yes. Kool2U provides mobile semi truck AC service throughout San Antonio, New Braunfels, Boerne and surrounding areas. Additional mileage charges may apply depending on location.
​
Schedule Semi Truck AC Service
For semi truck or commercial truck AC diagnostics and repair, call Kool2U and tell us:
• Truck make
• Truck model
• Approximate year
• Truck location
• What the AC is doing
• Whether the truck is part of a fleet
• Any previous AC repairs or refrigerant service you know about
​
Kool2U Auto Repair Service
4531 N. Stahl Park Suite 111
San Antonio, TX 78217
Monday through Friday
8:00 AM to 5:00 PM