HVACopediaTrane · Furnace
CoF Continuous fan demand
What the display is showing
Display for a continuous-fan call (G only). Also read on a communicating system when the furnace runs the blower for cooling or heat pump operation.
Applies to: S8V2, S8B1, S8X1, S8X2 and S9V2
Settings for these units
Clearance to combustibles · Trane S8V2
| Cabinet width | Vertical sides / top | Horizontal sides / top |
|---|---|---|
| 14.5 in. | 0 / 1 in. | 1 / 2 in. |
| 17.5 in. | 0 / 1 in. | 1 / 2 in. |
| 21.0 in. | 0 / 1 in. | 1 / 3 in. |
| 24.5 in. | 0 / 1 in. | 1 / 5 in. |
24 in. front service access.
3 in. in front of the combustion air openings.
Return filter size by cabinet width · Trane S8V2
| 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.
- Return filter size by cabinet width · Trane S8B1, Trane S8X1, Trane S8X2
- Return filter size - upflow and downflow · Trane S9V2
- Clearance to combustibles · Trane S9V2
Models that show this code
44 models in Trane S8V2, Trane S8B1, Trane S8X1, Trane S8X2, Trane S9V2
Other codes on the same units
- tP1 to tP9 Blower tap in use
- --- Faults cleared confirmation
- ARF Calculated airflow readout (cfm x 10)
- Both LEDs flashing together Bluetooth pairing in progress
- Cr Control code release number
- FD Factory default reset done
- HLd Hold during run test
- Ht Gas heating (single-stage models)
Save it for the next call
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Source: Trane S8V2 installation FNR-SVX003A-EN, Figure 73, p.58; Trane S8B1/S8X1/S8X2 installation 18-CE14D1-1A-EN, System Status Menu, p.57; S9V2 installation 18-CE19D1-1B-EN wiring note. 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.