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Understanding Packaged Systems

Packaged systems, or all-in-one systems, are becoming popular in regions where construction techniques favor a single cabinet design. They’re typically installed outdoors at ground level, but may also be placed in a crawl space or even on the roof for horizontal or down-flow designs.

Packaged System Maintenance


The following information is for educational purposes only. Tampering with your system may void your warranty. If you have any questions about your system, call a Trane Comfort Specialist™.

Homeowner DIY maintenance

While most packaged system preventative maintenance should be performed by a certified dealer, there are a few basic maintenance tasks you can perform without the help of a certified technician – assuming of course your unit is installed at ground level.

  • Clean or change your filters once a month or as needed.
  • Maintain the system according to your Trane manual.
  • Clean outdoor coils whenever they appear dirty.
  • Remove foliage and clutter from around the outdoor unit.
  • Clean the supply and return registers in your home and straighten their fins if bent.

    Dealer Maintenance

    You should have a Trane Comfort Specialist examine your packaged system at least once a year. A certified comfort specialist will follow a packaged system preventative maintenance checklist to insure the health of your unit. Your Trane technician will inspect the following:

    • Ducts, filters, blower, and outdoor coil for dirt and other obstructions.
    • Duct leakage.
    • Adequate airflow.
    • Correct refrigerant charge.
    • Refrigerant leaks.
    • Electric terminals, and, if necessary, clean and tighten connections, and apply non-conductive coating.
    • Lubricate motors, and inspect belts for tightness and wear.
    • Correct electric control, making sure that heating is locked out when the thermostat calls for cooling and vice versa.
    • Correct thermostat operation.