Bryant 582A Installation, Start-Up, And Operating Instructions Manual page 31

SYMPTOM
Burners will not ignite.
Inadequate heating.
Poor flame characteristics.
TABLE 17—TROUBLESHOOTING GUIDE–HEATING
CAUSE
Water in gas line
No power to furnace
No 24-v power supply to control circuit
Miswired or loose connections
Burned-out heat anticipator in
thermostat
Broken thermostat wire
Misaligned spark electrodes
No gas at main burners
Dirty air filter
Gas input to furnace too low
Unit undersized for application
Restricted airflow
Blower speed too low
Limit switch cycles main burners
Incomplete combustion results in:
Aldehyde odors, carbon monoxide, sooting
flame, floating flame
—31—
REMEDY
Drain. Install drip leg.
Check power supply fuses, wiring, or circuit breaker.
Check transformer.
NOTE: Some transformers have internal overcurrent
protection that requires a cool-down period to reset.
Check all wiring and wirenut connections
Replace thermostat.
Run continuity check. Replace wire if necessary.
Check flame ignition and sense electrode positioning.
Adjust as necessary.
1.Check gas line for air. Purge as necessary.
NOTE: After purging gas line of air, wait at least 5 minutes for any
gas to dissipate before attempting to light unit.
2. Check gas valve.
Clean or replace filter as necessary.
Check gas pressure at manifold match with that on
unit nameplate.
Replace with proper unit or add additional unit.
Clean or replace filter. Remove any restriction.
Use faster speed tap if available, or install alternate
motor.
Check rotation of blower, thermostat heat anticipator settings,
temperature rise of unit. Adjust as necessary.
1.Tighten all screws around burner compartment.
2. Cracked heat exchanger. Replace.
3. Unit overfired. Reduce input (change orifices or
adjust gas line or manifold pressure).
4. Check burner alignment.