20
TROUBLESHOOTING GUIDE
CONDITION
CAUSE
REMEDY
The burner will not ignite.
No gas.
Check with gas utility company.
Dirt in gas line.
Notify utility. Install drip leg in gas line.
Air intake terminal is blocked.
Check outside for debris in the terminal or frozen air
intake terminal and remove.
Main burner line clogged.
Clean. Check for source of trouble and correct.
Defective flame sensor.
Replace with new flame sensor.
Defective gas control valve.
Replace with new gas control valve.
Gas control valve set too low.
Turn temperature dial to desired temperature.
The burner flame floats and
lifts off ports.
High gas pressure.
Check with gas utility company.
Orifice too large.
Replace with correct orifice.
Flue clogged.
Clean. Check for source of trouble and correct.
Air intake terminal is blocked.
Check outside for debris in the terminal and remove.
Cold drafts (downdraft).
Locate source and correct.
The burner flame is yellow
and lazy.
Insufficient secondary air.
Check that the air intake terminal is not blocked.
Flue clogged.
Clean. Check for source of trouble and correct.
Air intake terminal is blocked.
Check outside for debris in the terminal and remove.
Main burner line clogged.
Clean. Check for source of trouble and correct.
The burner flame is too high.
Insufficient secondary air.
Check that the air intake terminal is not blocked.
Orifice too large.
Replace with correct orifice.
Defective gas control valve.
Replace with new gas control valve.
The flame burns at
the orifice.
Low gas pressure.
Check with gas utility company.
Defective gas control valve.
Replace with new gas control valve.
High operating costs.
Gas control valve set too high.
Turn temperature dial to desired temperature.
Sediment or lime in tank.
Drain. Check to see if water treatment is necessary.
Water heater is undersized.
Install size of water heater that meets demand.
Wrong piping connections.
Correct piping, dip tube must be in cold inlet.
Leaking faucets.
Repair faucets.
Gas leaks.
Check with gas utility company. Repair at once.
Wasted hot water.
Advise consumer.
Long runs or exposed piping.
Insulate piping.
Hot water piping on outside wall.
Insulate piping.
Insufficient hot water.
Low gas pressure.
Check with gas utility company.
Wrong piping connections.
Correct piping, dip tube must be in cold inlet.
Sediment or lime in tank.
Drain. Check to see if water treatment is necessary.
Water heater is undersized.
Install the size of water heater that meets the demand.
Gas control valve set too low.
Turn temperature knob to desired temperature.
Leaking faucets.
Repair faucets.
Wasted hot water.
Advise consumer.
Long runs or exposed piping.
Insulate piping.
Hot water piping on outside wall.
Insulate piping.
Slow hot water recovery.
Insufficient secondary air.
Check that the air intake terminal is not blocked.
Low gas pressure.
Check with gas utility company.
Gas control valve set too low.
Turn temperature dial to desired temperature.
Improper calibration.
Replace gas control valve.
Flue clogged.
Clean. Check for source of trouble and correct.
Water heater is undersized.
Install size of water heater that meets demand.
Wrong piping connection.
Correct piping, dip tube must be in cold inlet.
Wasted hot water.
Advise consumer.
