23
TROUBLESHOOTING
Important: 90% of start-up
problems are due to air leaks in
the suction line.
COMPLAINT
Odor, soot and smoky fire
Delayed ignition
Burner will not operate
Burner motor runs but does not fire
Pulsations
CHECK FOR:
1. Insufficient combustion air
2. Lack of proper draft
3. Cracked/plugged heat exchanger
4. Burner not adjusted properly with combustion kit
5. Improper setting of barometric draft control
6. Oil leaks
7. Wrong nozzle size, or nozzle worn or partially clogged
8. Improper setting of electrodes
9. Plugged oil filter
10. Fuel pump cutoff valve not cutting off
11. Nozzle or electrodes improperly positioned
12. Leakage on return side of air distribution system
13. After drip, reflected heat, or impingement of flame
14. Improper or distorted end cone
15. Air leakage into oil pump supply line
16. Burner blower air inlet restricted or burner blower wheel dirty
17. Restricted flue
1. Cracked, dirty or loose electrodes
2. Electrodes not properly adjusted
3. Incorrect nozzle
4. Improper primary air adjustment
5. Faulty ignition transformer
6. Water in fuel oil
7. Incorrect pump pressure
8. Furnace not properly set-up
9. Air leakage into oil supply line
1. Open switch
2. Open fuse or circuit breaker
3. Burner motor overload open
4. Thermostat improperly set
5. Burner primary control safety open
1. Oil supply insufficient
2. Faulty oil pump
3. Broken oil pump drive coupling
4. Coke deposits on electrodes
5. Air in oil supply line
6. Restricted oil supply line
7. Clogged nozzle
8. Restricted oil line filter
9. Leak in oil line
10. Failed ignition transformer
11. Electrodes not properly set
12. Dirty fire detector
1. Improper nozzle
2. Inadequate draft
3. Air in oil line
4. Clogged flue
5. Furnace not properly set-up
6. Partially clogged pump strainer or oil line filter
7. Nozzle plugged
8. Nozzle too far forward in air tube
9. Barometric damper set wide open
