Trane Furnace Error Codes: Complete XC95m and XR95 Fault Code Reference

Quick Answer

Trane furnace error codes appear on the digital display or as LED blink patterns on the control board. Key codes include E3.2 (pressure switch circuit open), E2.1 (rollout limit switch tripped), E12 (ignition lockout after three attempts), 7P1 (communication fault between control board and thermostat or blower), and HT2 (high temperature lockout). E3.2 is the most common code and is usually caused by a blocked condensate drain rather than a failed switch. E2.1 and HT2 both relate to overheating but from different causes. E12 and 7P1 are harder to DIY and often require a technician.

TraneFurnace

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Not seeing HUB on your display?

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pressure switch circuit fault

E3.2

rollout limit switch tripped

E2.1

ignition lockout after three attempts

E12

communication fault between board and thermostat

7P1

high temperature limit tripped

HT2

About These Trane Furnace Error Codes

Trane furnace error codes identify which safety circuit or component has faulted. Match your displayed code or LED blink count to the list below and follow the linked repair guide.

Most Common Error Codes

Blocked condensate drain line triggering E3.240%

Overheating from dirty filter triggering HT2 or E2.124%

Ignition component failure causing E1214%

Flue restriction or rollout condition causing E2.112%

Communication wiring fault triggering 7P110%

Symptoms You May Notice

Furnace not heating or shutting off before completing a cycle
Digital display showing an alphanumeric error code
LED blink pattern on control board
No ignition despite thermostat heat call
Blower running continuously without heat

Tools Required for Diagnosis

FlashlightFurnace owner's manual or installation manual

How to Identify Your Error Code

Note the exact code shown on the display or count the LED blink

Note the exact code shown on the display or count the LED blink pattern. Write it down. On LED models: count the short blinks, wait for the pause, count the long blinks. The combination is your fault number.

Cross-reference your code

As a first step applicable to most codes, check the air filter

Frequently Asked Questions

How do I read an error code on a Trane XC95m furnace?

The XC95m has a digital display on the control board. The display shows a two or three character code such as E3.2 or E12. If the display is not visible from the outside, remove the lower cabinet door (usually held by two clips) to expose the control board. The display will cycle between the active fault code and the current operating status.

How do I read error codes on a Trane XR95 or XB80 without a display?

The XR95 and XB80 use an LED blink code system on the control board. Watch the LED through the observation window or open the lower cabinet door. Count the short blinks before the pause, then count the long blinks after the pause. Together they form a two-digit fault code. Refer to the fault code table in your installation manual or the sticker inside the cabinet door.

What is the most common error code on Trane XC95m and XV95 furnaces?

E3.2 is the most frequently reported code on Trane XC95m and XV95 models. It indicates the induced draft pressure switch circuit is open. The most common underlying cause is a blocked condensate drain line, not a failed pressure switch. Clearing the condensate trap with a wet/dry vacuum resolves the majority of E3.2 cases without any part replacement.

Does a Trane furnace reset automatically after an error?

Most Trane fault codes will attempt an automatic restart after a brief lockout period, with the exception of E2.1 (rollout switch), which requires a manual button press on the switch itself. E12 ignition lockout requires a thermostat or power reset. If the same code returns immediately after an auto-restart, the fault condition is still present and the root cause must be addressed.

Where can I find the full Trane furnace fault code list for my specific model?

The complete fault code table for your specific Trane model is printed on a sticker inside the lower cabinet door on most units. It is also available in the installation manual, which can be downloaded from trane.com by entering your model number. The model number label is located on the inside of the upper cabinet or on the lower cabinet door frame.

Related Trane Furnace Error Codes

Code: E3.2Trane Furnace E3.2 Error Code: Pressure Switch Open Code: E2.1Trane Furnace E2.1 Error Code: Rollout Switch Open Code: E12Trane Furnace E12 Error Code: Ignition Lockout Code: 7P1Trane Furnace 7P1 Error Code: Communication Fault Code: HT2Trane Furnace HT2 Error Code: High Temperature Lockout

Models Known to Experience HUB Errors

This repair applies to most Trane furnaces with this error code. Common model numbers include:

XC95m, XV95, S9X2, XR95, XB80

Last verified for technical accuracy on March 14, 2026