HVACopediaRheem · Furnace
F Continuous fan on
What the display is showing
F on the display means the blower is running continuously from a fan-only call (thermostat fan switch on). Normal. A lockout fault code replaces the F while the control is locked out.
Applies to: Rheem/Ruud (-)802P / 80MDP 80% two-stage furnaces; R95P furnaces
Settings for these units
Clearance to combustibles (all models) · R95P
| Location | Minimum clearance |
|---|---|
| Left side | 0 in. |
| Right side | 0 in. |
| Back | 0 in. |
| Top | 1 in. |
| Front | 2 in. |
| Vent | 0 in. |
| Service (front) | 24 in. recommended |
Same values for R95PA040 through 115.
Column order read from a rotated drawing header - confirm on the furnace clearance label.
Reduced clearance to combustibles, upflow/horizontal (Fig. 4) · Rheem/Ruud 802P / 80MDP 80% two-stage furnace (UT 1028-928 IFC)
| Model size | Cabinet width (A) | Left side | Right side | Back | Top | Front | Vent |
|---|---|---|---|---|---|---|---|
| 050 (5) | 14 in. | 0 in. | 4 in. (note 2) | 0 in. | 1 in. | 3 in. | 6 in. (note 3) |
| 075 (7) | 17-1/2 in. | 0 in. | 3 in. (note 2) | 0 in. | 1 in. | 3 in. | 6 in. (note 3) |
| 100 (10) | 21 in. | 0 in. | 0 | 0 in. | 1 in. | 3 in. | 6 in. (note 3) |
| 125 (12) | 24-1/2 in. | 0 in. | 0 | 0 in. | 1 in. | 3 in. | 6 in. (note 3) |
| 150 (15) | 24-1/2 in. | 0 in. | 0 | 0 in. | 1 in. | 3 in. | 6 in. (note 3) |
Note 2: right side may be 0 in. with type B vent.
Note 3: vent clearance may be 1 in. with type B vent.
Models that show this code
23 models in Rheem/Ruud 802P / 80MDP 80% two-stage furnace (UT 1028-928 IFC), R95P, R96V/96MDV
Other codes on the same units
- d4 Memory card invalid (MEM CARD INVALD)
- d6 Blower HP conflict (BLWR HP CNFLCT)
- AF Airflow readout (pushbutton status menu)
- C Cooling or heat-pump heat (compressor call)
- FL Fault history (pushbutton status menu)
- Fault recall Power-up replay of the last three faults
- Flame LED rapid blink Amber flame LED - unexpected flame
- Flame LED slow blink Amber flame LED - marginal flame sense
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Source: Rheem (-)802PA Installation Instructions, Diagnostics and Fault Codes (UT 1028-928 control), pp.40-41; R95P pp.87-89. 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.