Trane XR16 (4TTR6036)
No warranty document for this unit was fetched. Residential HVAC warranties commonly require registration within a set window after installation and commonly limit or exclude coverage when equipment is used in a commercial or rental application — the owner must verify this against their own Trane registration certificate and warranty document rather than relying on this brief.
Trane's own troubleshooting guidance for an AC that is not cooling: "Set your AC to 'OFF' and turn off the breakers that supply it with power" before cleaning or replacing filters. Do this before opening any filter door or approaching the outdoor unit. [1]
Trane: check the thermostat setting and make sure it is set to cool; if it is set to cool, confirm the temperature setting is at the desired temperature. If it is not set to cool, switch to cooling operation. [1]
Documented check: confirm that no one changed the schedule or turned on energy-saving modes that delay cooling. Relevant at a rental where guests or a prior cleaner may have altered settings. [2]
Documented remedy for a system that will not run/cool: turn on the thermostat or replace the batteries. [3]
With power off at the breaker, clean or replace the filters. Consult a local Trane Comfort Specialist if you are unsure where the filters are located. [1]
Documented remedy when the outdoor cooling coil is clogged or blocked: clean up the debris in the outside cooling coil. Keep power off at the breaker while doing this. [3]
Documented remedy: reset the circuit breaker. If it trips again after reset, stop and leave it off for a technician. [3]
| Code | Documented meaning | Documented action | Who | Why shown | Source |
|---|---|---|---|---|---|
| — | Clogged or dirty air filter restricting airflow. A clogged filter restricts airflow, causing the evaporator coil to freeze and the system to lose cooling capacity; the AC may run constantly but barely cool. | Turn off the system at the thermostat, then clean or replace the filter. | Anyone | Listed as one of the most common documented causes of a Trane central AC not cooling, which is the reported symptom. | dealer [2] |
| — | Blocked or clogged condenser coil at the outdoor unit — when operating correctly the condenser fan draws air through the condenser coil to pull heat energy out of the home. | Clean up the debris in the outside cooling coil. | Anyone | Trane lists a blocked/clogged condenser coil among documented causes of an AC running but not lowering indoor temperature. | manufacturer [1] |
| — | Indoor air handler coil clogged or blocked with dust buildup. | Wipe away any buildup of dust on the coil or change the air filter. | Technician | Documented cause of no-cool on Trane air conditioners; accessing the indoor coil is beyond a cleaner's scope, so routed to a technician. | dealer [3] |
| — | Refrigerant low or leaking. | Contact an authorized service technician. | Technician | Trane lists leaking or low refrigerant among the common causes when an AC is not cooling the house. | dealer [3] |
| — | Failed capacitor, or a failed motor/compressor — indicated when the outdoor unit is not running or is unusually loud. | These require professional diagnosis and repair; schedule AC repair service. | Technician | A bad capacitor is listed among the most common reasons a Trane central AC is not cooling; surfaced by the no-cool symptom. | dealer [2] |
| — | Thermostat controls set incorrectly, or thermostat electronics/wiring failing (no response after fresh batteries and correct settings). | Reset the thermostat; if it still does not respond after fresh batteries and proper settings, schedule AC repair service. | Anyone | Thermostat problems are listed among the most common documented causes of a Trane AC not cooling. | dealer [2] |
Age cannot be stated. The serial number and manufacture date on the data plate are not readable, so no manufacture-date-to-today (2026-08-18) age calculation is possible for this unit.