Thermo King TriPac APU mounted under a green sleeper truck

Mobile APU repair and refrigerant service

APU Recharge

Truck-side auxiliary power unit repair, APU freon recharge, leak testing, electrical diagnostics, and brand-specific service for Thermo King, Carrier, and custom sleeper cooling systems.

Call 800-554-0539 Track technician

Refrigerants: R-134a, R-404A, custom applications
Brands: Thermo King, Carrier, RigMaster, Dynasys
Service: Recharge, repair, leak checks, diagnostics

Fast service paths

Service organized around the way drivers describe the problem

Choose the exact APU help you need: repair, recharge, freon recharge, Thermo King service, Carrier service, or refrigerant-specific diagnostics.

Diagnostics APU Repair

No-start, no-cool, electrical, compressor, fan, belt, battery, and control faults.

Cooling APU Recharge

Recovery, vacuum test, leak check, and measured recharge for sleeper cooling systems.

Refrigerant APU Freon Recharge

EPA certified refrigerant handling for R-134a, R-404A, and custom applications.

Dispatch Track Technician

A customer-facing tracking experience for ETA, service status, and arrival preparation.

Why drivers call

A recharge that lasts starts before refrigerant goes in

Low charge is only one possible reason a truck APU is not cooling. A thoughtful service call looks at the refrigerant circuit, the fan circuit, the electrical command, and the sleeper airflow before the system is called fixed.

Listen to the failure Warm air at idle, short cycling, frost, compressor silence, and shutdown faults all point to different test paths.
Protect the refrigerant circuit Recovery, vacuum, leak checks, and correct charge weight protect compressors from air, moisture, and overcharge.
Check the support systems A weak battery, bad condenser fan, clogged coil, or control fault can make a good refrigerant charge perform badly.
Prove it under load The tech checks temperature split, pressures, amp draw behavior, and cycling after the repair.

APU refrigerant gauges connected to a truck-side cooling system — Truck-side APU freon recharge and diagnostic gauge service.

Uber-style workflow

Dispatch the right technician, not just the closest one

R-134a jobs, R-404A custom jobs, Carrier repairs, Thermo King TriPac work, and electrical faults need different stock and tools. Skill-based dispatch prevents wasted trips.

Request

Driver or fleet submits brand, symptoms, location, and refrigerant label details.

Match

Dispatch routes the job to a technician carrying the right recovery machine, refrigerant, leak detector, and parts.

Track

A customer-facing tracker shows request status, technician assignment, ETA, arrival, and completion steps.

Service menu

Choose the exact APU service

Drivers and dispatchers can move straight to the page that matches the truck, brand, refrigerant, or cooling complaint.

Thermo King Thermo King APU Repair

TriPac no-cool, no-start, compressor, fan, belt, alternator, and control diagnosis.

Thermo King Thermo King APU Recharge

TriPac freon recharge, leak checks, vacuum testing, and measured refrigerant service.

Carrier Carrier APU Repair

ComfortPro, Aspen, and Carrier-style auxiliary cooling system repair.

Carrier Carrier APU Recharge

Carrier APU freon recharge and custom application support.

R-134a R-134a APU Service

Common truck APU refrigerant service with recovery, vacuum, and recharge verification.

R-404A R-404A Custom Refrigeration

Specialty and custom refrigeration dispatch for the right equipment and refrigerant.

Photo proof

Real APU service photos

The site uses real truck-side APU images so drivers can quickly recognize the kind of service being offered.

Carrier APU system installed on a semi truck sleeper

APU freon recharge gauges connected during truck-side service

Carrier ComfortPro APU refrigeration unit on a semi truck

FAQ

Questions drivers ask before dispatch

Straight answers help avoid the wrong truck, wrong refrigerant, or wrong tool showing up.

Can APU Recharge help if my sleeper is blowing warm air?

Yes. Warm air can come from low refrigerant, dirty coils, bad fans, compressor problems, electrical faults, or control issues. The service call starts with diagnosis.

Do you service Thermo King and Carrier APUs?

Yes. Dispatch can route Thermo King TriPac, Carrier ComfortPro, Carrier Aspen, and other APU service calls to the right technician when coverage is available.

Do you help fleets before summer heat?

Yes. Fleets can request preventive recharge checks, leak checks, filter and airflow inspection, and repair scheduling before driver comfort becomes an emergency.