TROUBLESHOOTING GUIDE
17
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.
Pilot line clogged.
Clean. Check for source of trouble and correct.
Combustion air intake holes blocked.
With a vacuum cleaner, remove dirt, dust, and lint.
Flame arrestor openings blocked.
With a vacuum cleaner, remove dirt, dust, and lint.
Main burner line clogged.
Clean. Check for source of trouble and correct.
Defective thermocouple.
Replace with new thermocouple.
Defective gas control valve.
Replace with new gas control valve.
Gas control valve set too low.
Turn temperature dial to desired temperature.
Heater installed in a confined area.
Provide fresh air ventilation.
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.
Combustion air intake holes blocked.
With a vacuum cleaner, remove dirt, dust, and lint.
Flame arrestor openings blocked.
With a vacuum cleaner, remove dirt, dust, and lint.
Heater installed in a confined area.
Provide fresh air ventilation.
Cold drafts (downdraft).
Locate source and correct.
The burner flame is yellow
and lazy.
Insufficient secondary air.
Provide fresh air ventilation.
Flue clogged.
Clean. Check for source of trouble and correct.
Combustion air intake holes blocked.
With a vacuum cleaner, remove dirt, dust, and lint.
Flame arrestor openings blocked.
With a vacuum cleaner, remove dirt, dust, and lint.
Main burner line clogged.
Clean. Check for source of trouble and correct.
Heater installed in a confined area.
Provide fresh air ventilation.
The burner flame
is too high.
Insufficient secondary air.
Provide fresh air ventilation.
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.
The pilot will not light
or remain lit.
No gas.
Check with gas utility company.
Dirt in gas line.
Notify utility. Install drip leg in gas line.
Pilot line clogged.
Clean. Check for source of trouble and correct.
Loose thermocouple connection.
Tighten with fingers then take 1/4 turn with wrench.
Defective thermocouple.
Replace with new thermocouple.
Cold drafts (downdraft).
Check source and correct.
Combustion air intake holes blocked.
With a vacuum cleaner, remove dirt, dust, and lint.
Flame arrestor openings blocked.
With a vacuum cleaner, remove dirt, dust, and lint.
Gas control valve high limit switch has tripped.
Replace with new gas control valve.
Resettable thermal switch on inner access
door has tripped.
Reset thermal switch on inner access door and
re-light burner.
Flammable vapours incident.
Contact a qualified service technician or the
manufacturer for further instructions.
Defective igniter.
Replace igniter assembly.
The access door
temperature high limit
switch is tripping.
Not enough draft from the chimney.
Check for any obstruction in the chimney. Ensure that
the chimney is sized and installed according to
proper installation codes.
Not enough fresh air for the combustion.
Supply make-up air. Refer to the proper installation codes.
Ambiant air temperature is too high.
Reduce ambiant air temperature.
Excessive dirt, dust or other debris
accumulation on the flame arrestor.
Clean the flame arrestor in the combustion chamber using
a stiff brush, compressed air and/or a vacuum cleaner.
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.
