Trane · Furnace

Ht Gas heating (single-stage models)

Normal status Trane S8B1Trane S8X1

What the display is showing

S8B1 and S8X1 show Ht during a gas heat call, alternating with the airflow tap readout. The legend lists Ht as the single-stage label for Ht1.

Applies to: S8B1 and S8X1

Settings for these units

Return filter size by cabinet width · Trane S8B1, Trane S8X1, Trane S8X2

Cabinet width	Filter
14-1/2 in.	1 - 14 x 25 x 1 in.
17-1/2 in.	1 - 16 x 25 x 1 in.
21 in.	1 - 20 x 25 x 1 in.
24-1/2 in.	1 - 24 x 25 x 1 in.

Filters are field supplied and mounted outside the cabinet.

Over 1600 CFM upflow: return on both sides, one side plus bottom, or bottom only.

Models that show this code

18 models in Trane S8B1, Trane S8X1

S8B1A026M2PSABS8B1A040M3PSABS8B1B040M2PSABS8B1B060M3PSABS8B1B060M4PSABS8B1B080M4PSABS8B1C080M5PSABS8B1C100M5PSABS8B1D120M5PSABS8X1A026M2PSABS8X1A040M3PSABS8X1B040M2PSABS8X1B060M3PSABS8X1B060M4PSABS8X1B080M4PSABS8X1C080M5PSABS8X1C100M5PSABS8X1D120M5PSAB

Other codes on the same units

tP1 to tP9 Blower tap in use
--- Faults cleared confirmation
CoF Continuous fan demand
Cr Control code release number
FD Factory default reset done
IdL Idle - no demand
dFt Outdoor defrost demand
err Active alarm menu

Save it for the next call

Star this code in the HVACopedia app and keep the whole library on your phone for jobs with no signal.

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Source: Trane S8B1/S8X1/S8X2 installation 18-CE14D1-1A-EN, System Status Menu, p.57; Sequence of Operation, p.60. Summarized in our own words; check the original manual for your model.

For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.