HVACopediaCarrier · Furnace
22 Abnormal flame-proving signal
What the control is telling you
Flame is sensed while the gas valve is supposed to be off. The inducer keeps running (high speed) until the fault clears.
Applies to: 59TP6A two-stage variable-speed ECM multipoise condensing gas furnace, all sizes (040-10 to 120-22)
Likely causes
- Gas valve stuck open or leaking through
Test and repair steps
- Warning: Flame with the valve de-energized means gas may be flowing; shut off gas at the manual valve immediately.
- Warning: Shut off 115-V power and gas, and lock/tag out before working inside the furnace; there may be more than one power source.
- Check if burners stay lit after the heat call ends.
- Replace the gas valve if it is stuck open or leaky.
- Leak-check gas connections and confirm the flame goes out at the end of the cycle.
Settings for these units
Filter sizes by casing width and filter cabinet · 59TP6A
| 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 | 16 x 25 x 3/4 in. | 16 x 25 x 3/4 in. | Washable |
| Furnace casing | 21 in. wide | 16 x 25 x 3/4 in. | 20 x 25 x 3/4 in. | Washable |
| Furnace casing | 24-1/2 in. wide | 16 x 25 x 3/4 in. | 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 |
No internal filter rack in this furnace - an external filter is required.
Side-return filters can differ in size - measure the existing filter.
Minimum clearances to combustibles · 59TP6A
| Position | Clearance |
|---|---|
| Rear | 0 in. (0 mm) |
| Front (combustion air openings) | 1 in. (25 mm) |
| Front, required for service | 24 in. (610 mm) - check local code |
| All sides of supply plenum | 1 in. (25 mm) - check local code |
| Sides | 0 in. (0 mm) |
| Vent | 0 in. (0 mm) |
| Top of furnace | 1 in. (25 mm) |
Keep 1 in. from combustibles to supply duct for 36 in. horizontally from the furnace.
Do not set on carpet or combustible tile; downflow on combustible floor needs the accessory floor base unless on a matching coil casing.
- Filter sizes by casing width · 58SB0A/58SB1A
Models that show this code
22 models in 59TP6A, 58SB0A/58SB1A
Other codes on the same units
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Source: Carrier 59TP6A Installation, Start-up, Operating and Service Instructions, Fig. 66 Troubleshooting Guide (cont.), p.89; Sequence of Operation, p.85. Summarized in our own words; check the original manual for your model.
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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.