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Troubleshooting
Water Heater Pilot Lights

 


PILOT OUTAGE
CONDITION SOLUTION
Gas pressure incorrect Set inlet pressure at a minimum 11" W.C. with two or more appliances running
Blocked “U” tube Remove obstruction
Improper main burner alignment Re-align main burner and main burner orifice holder and gas valve
Improper air adjustment Adjust main burner air shutter approximately 1/4 open
Weak thermocouple Replace thermocouple
Poor pilot flame Clean or replace pilot orifice
Weak gas control magnet Replace gas control
Defective E.C.O. in control Replace gas control and check the pilot flame. It should be high enough to engulf the thermocouple at all times

PILOT OUTAGE WHEN BUTTON OR KNOB IS RELEASED
CONDITION SOLUTION
Thermocouple not hot Hold button or knob for 30 seconds before releasing
Thermocouple loose Tighten connection at gas control
Weak thermocouple Replace thermocouple
Weak gas control magnet Replace gas control
Defective E.C.O. in control Replace gas control

MAIN BURNER WILL NOT IGNITE
CONDITION SOLUTION
Blocked main burner orifice Clean or replace orifice
Main burner flame spreader mis-alignment Square flame spreader to end of main burner
Blocked main burner Remove blockage
Improper air adjustment Adjust main burner air shutter approximately 1/4 open
Blocked “U” tube Remove blockage
Gas control out of calibration Replace gas control

ERRATIC MAIN BURNER FLAME
CONDITION SOLUTION
Improper gas pressure Set inlet pressure to a minimum of 11 W.C. with two or more appliances running
Improper air adjustment Adjust main burner air shutter approximately 1/4 open
Partial blockage of main burner Remove blockage
Partial blockage of main burner orifice Clean or replace orifice
Flame spreader misaligned Re-align spreader or replace main burner
Blockage in “U” tube Remove blockage
Poor gas supply Replace gas supply
Exhaust grille blocked Remove blockage
Improper main burner alignment Re-align main burner, main burner orifice holder and gas valve

SMOKING AND SOOTING
CONDITION SOLUTION
Gas pressure incorrect Set inlet pressure to a minimum of 11 W.C. with two or more appliances running
Poor gas supply Replace gas supply
Improper pilot flame Clean or replace pilot orifice
Improper air adjustment Adjust main burner air shutter approximately 1/4 open
Flame spreader mis-aligned Re-align or replace main burner
Blocked main burner Remove blockage
Improper main burner alignment Re-align main burner, main burner orifice holder and gas valve
Blocked “U” tube Remove blockage

INSUFFICIENT WATER TEMPERATURE
CONDITION SOLUTION
Temperature selector out of place Re-set to desired position
Bypass levers improperly positioned Reposition levers
Improper air adjustment Adjust main burner air shutter approximately 1/4 way open
Partial main burner blockage Remove blockage
Improper main burner adjustment Re-align main burner and main burner orifice
Flame spreader mis-aligned Re-align or replace main burner
Blocked “U” tube Remove blockage

 

Submitted by Mike Sundberg - 3/17/06


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