14
130931 Rev April ʻ07
COMMON COMPLAINTS (continued)
SYMPTOM
Flame burns at orifice
Pilot will not remain lit
High operating costs
Insufficient hot water
Slow hot water recovery
Drip from relief valve
POSSIBLE CAUSES(S)
1. Low gas pressure
2. Defective thermostat
1. Low gas pressure
2. No gas
3. Dirt in gas lines
4. Pilot line or
orifice clogged
5. Thermocouple connection
loose
6. Defective thermocouple
7. Cold drafts
8. Thermostat ECO
switch open
1. Improper calibration
2. Thermostat set too high
3. Sediment or lime in tank
4. Heater too small for job
5. Wrong piping connections
6. Leaking faucets
7. Gas leaks
8. Wasted hot water
9. Long runs of exposed piping
10. Hot water piping in
outside wall
11. Nofluebaffle
1. Low gas pressure
2. Orifice too small
3. Improper calibration
4. Thermostat set too low
5. Sediment or lime in tank
6. Heater too small for job
7. Wrong piping connections
8. Leaking faucets
9. Wasted hot water
10. Long runs of exposed piping
11. Hot water piping in
outside wall
1. Insufficient secondary air
2. Low gas pressure
3. Orifice too small
4. Improper calibration
5. Thermostat set too low
6. Heater too small for job
7. Wrong piping connections
8. Wasted hot water
1. Excessive water pressure
2. Heater stacking
3. Closed water system
CORRECTIVE ACTION
1. Check with utility
2. Replace with new thermostat
1. Check with utility
2. Check with utility
3. Notify utility-install dirt trap in gas lines
4. Clean-check for source of trouble & correct
5. Tighten with fingers-then take 1/4 turn with wrench
6. Replace with new thermocouple
7. Check source and correct
8. Replace thermostat
1. Replace thermostat
2. Turn temperature Dial to desired temperature
3. Drain-check to see if water treatment is necessary
4. Install adequate heater
4. Correct piping-dip tube must be in cold inlet
6. Repair faucets
7. Check with utility-repair at once
8. Advise users
9. Insulate
10. Insulate
11. Install flue baffle
1. Check with utility
2. Replace with correct orifice
3. Replace thermostat
4. Turn temperature Dial to desired temperature
5. Drain-check to see if water treatment is necessary
6. Install adequate heater
7. Correct piping-dip tube must be in cold inlet
8. Repair faucets
9. Advise users
10. Insulate
11. Insulate
1. Provide ventilation to heater. Check flueway & flue
baffle assembly for obstructions.
2. Check with utility
3. Replace with correct orifice
4. Replace thermostat
5. Turn temperature Dial to desired setting
6. Install adequate heater
7. Correct piping-dip tube must be in cold inlet
8. Advise users
1. Use pressure reducing valve and pressure relief valve
2. Lower thermostat setting
3. See Page 1, “Pressure Build-up in Water System”
Summary of Contents for 100-83 AS
Page 7: ...130931 Rev April 07 4...
