HVACopediaCarrier · Furnace
PRG Startup display - model program number
What the display is showing
After power-up the 3-digit display alternates between the model program number (PRG) and the software version (uEr). The program number is set at the factory for the furnace and should match the number on the rating plate. After about 60 seconds without button presses it shows the system status instead.
Applies to: 59SC6A, Payne PG96VTA and 59MN7C furnaces (3-digit display control)
Settings for these units
Filter sizes by casing width and filter cabinet · 59SC6A
| Location | Size | Side return filter | Bottom return filter | Type |
|---|---|---|---|---|
| Furnace casing | 14-3/16 in. wide | 16 x 25 x 3/4 in. | 14 x 25 x 3/4 in. | Washable |
| Furnace casing | 17-1/2 in. wide | (1) 16 x 25 x 3/4 in. | (1) 16 x 25 x 3/4 in. | Washable |
| Furnace casing | 21 in. wide | (1) 16 x 25 x 3/4 in. | (1) 20 x 25 x 3/4 in. | Washable |
| Furnace casing | 24-1/2 in. wide | (1) 16 x 25 x 3/4 in. | (1) 24 x 25 x 3/4 in. | Washable |
| Filter cabinet | 16 in. high | (1) 16 x 25 x 3/4 in. or (1) 16 x 25 x 4-5/16 in. | - | Washable or media |
| Filter cabinet | 20 in. high | (1) 20 x 25 x 3/4 in. or (1) 20 x 25 x 4-5/16 in. | - | Washable or media |
| Filter cabinet | 24 in. high | (1) 24 x 25 x 3/4 in. or (1) 24 x 25 x 4-5/16 in. | - | Washable or media |
Side-return filters can differ in size - measure the existing filter.
Every return-air inlet needs a filter.
Minimum clearances to combustibles · 59SC6A
| Position | Minimum clearance |
|---|---|
| Rear | 0 |
| Front (combustion air openings in furnace and in structure) | 1 in. (25 mm) |
| Required for service | 24 in. (610 mm) (see note) |
| All sides of supply plenum | 1 in. (25 mm) (see note) |
| Sides | 0 |
| Vent | 0 |
| Top of furnace | 1 in. (25 mm) |
Service and supply-plenum values are marked 'consult local building codes'.
Keep 1 in. (25 mm) from combustibles to supply ductwork for 36 in. (914 mm) horizontally from the furnace.
- Filter sizes by casing width · Payne PG96VTA
Models that show this code
25 models in 59SC6A, Payne PG96VTA, 59MN7C
Other codes on the same units
- Hpd Heat pump defrost - furnace heating
- Ht Heating (59SC6A, 59MN7C menu: heating airflow setting)
- Ht-% Heating at a percent firing rate (59MN7C)
- Htt Menu: heating thermostat type
- PUr Component test - purge (inducer on)
- Pri Twinning: primary furnace
- SEC Twinning: secondary furnace
- UPF Display set for upflow
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Source: Carrier 59SC6A installation instructions, On-Board Control Method, p.52; Payne PG96VTAB installation instructions, On-Board Control Method, p.52; Carrier 59MN7C installation instructions, On-Board Control Method, p.46. 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.