Service manual

150158 Rev. 2 August - 2010
18
Flame burns
at orifice
Pilot will
not remain
lit
High
operating
costs
Insufficient
hot
water
Slow
water
recovery
Drip from
relief valve
Thermostat
fails to close
Condensation
Combustion
Odors
Smoking and
carbon
formation
Pilot flame
too small
Pilot flame
too large
Low gas pressure
Defective thermostat
Low gas pressure
Defective thermostat
No gas
Dirt in gas lines
Pilot line clogged
Improper calibration
Thermostat set too high
Sediment or lime in tank
Heater too small for job
Leaking faucets
Gas leaks
Wasted hot water
Long runs of exposed piping
Hot water piping in outside wall
Low gas pressure
Orifice too small
Thermostat set too low
Heater too small for job
Leaking faucets
Wasted hot water
Long runs of exposed piping
Hot water piping in outside wall
Insufficient secondary air
Low gas pressure
Orifice too small
Thermostat set too low
Sediment or lime in tank
Heater too small for job
Wasted hot water
Excessive water pressure
Defective thermostat
Insufficient secondary air
Flue clogged
Insufficient secondary air
Low gas pressure
Orifice too large
Flue clogged
Heater installed in confined area
Low gas pressure
Pilot line clogged
Pilot line not clogged
Pilot line not clogged
Check with utility
Replace with new thermostat
Check with utility
Replace with new thermostat
Check with utility
Notify utility-install dirt trap in gas lines
Clean-check for source of trouble & correct
Replace control valve
Turn temperature knob to desired temperature
Clean out sediment; Refer to Page 12
Install adequate heater
Repair faucets
Check with utility-repair at once
Advise customer
Insulate
Insulate
Check with utility
Replace with correct orifice
Turn temperature dial to desired temperature
Install adequate heater
Repair faucets
Advise customer
Insulate
Insulate
Provide ventilation to heater
Check with utility
Replace with correct orifice
Turn temperature dial to desired temperature
Clean out sediment; Refer to Page 12
Install adequate heater
Advise customer
Use pressure reducing valve
Replace with new thermostat
See Page 12
Provide ventilation to heater
Clean-check for source of trouble & correct
Provide ventilation to heater
Check with utility
Replace with correct orifice
Clean-check for source of trouble & correct
Provide ventilation by use of louvers in wall or duct
Check with utility
Clean-check for source of trouble & correct
Adjust pilot
Adjust pilot
COMMON COMPLAINTS (continued)