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These guidelines should be utilized by a qualified service agent.

TROUBLESHOOTING GUIDELINESTROUBLESHOOTING GUIDELINES
PROBLEM CAUSE SOLUTION
1.) Blower will not run.
a. “ON/OFF” control switch turned off. Turn switch to the “ON” position .
b. Blower unplugged. Plug blower back into 115 VAC outlet.
c. No power at outlet. Repair service to outlet.
d. Thermostat defecti ve. Replace thermostat .
e. Control harness defective. Replace control harness.
f. High limit c ontrol circuit open. Replace thermos tat.
g. Blower motor defective. Replace blower assembly.
2.) Thermostat probl em s
a. Thermostat se t too low. Adjust temperature control higher.
b. Thermostat or ECO defective. Replace thermostat.
3.) Others
a. Heater undersized. Reduce hot water use.
b. Low gas pressure. Contact de al er .
c. Incoming water is usually cold . A llow more time for heater to reheat.
d. Leaking hot w ater pipes of fixtures. Have plumber check an d repair leaks.
NOT ENOUGH HOT WATER
e. Heater not lit or thermostat not on. Refer to LIGHTING INSTRUCTIONS.
VENT PIPE TOO HOT (ABOVE 170° F [ 77° C ])
Wrong burner orifice. Install correct orifice.
Dirt in burner ports. Turn off heat er an d gas , cl ea n burner head.
YELLOW FLAME Combustion air path restricted. Check exhaust venting and air openings in
bottom base pan f or obstructions or blockage.
Water on the fl oor under heater. See CONDENSATION sec tion.
CONDENSATION W ater dripping from blower assembly. Provid e drip “TEE” to catch condensa tion, see
Figure 1.
Improperly seal ed, hot or cold supply
connections, r elief valve, drain valve or
thermostat threads.
Check for leaks at all condensate points. See
Figure 1. Also see LEAK CHECKPOINTS
section.
Leakage from other app liances or water lines. Inspect other appl i a nc es near water heater.
WATER LEAKS
Condensation of flue products. Refer to CONDENSATION section.
Thermal expansion in closed water system. Install th erm al expansion tank (Do not plug
T&P valve).
LEAKING T & P Im properly sealed valve. Ch eck relief valve for proper op eration (Do
not plug T&P valve).
High sulfate or mineral content in water
supply. Drain and flush heater tho r oughly then refill.
HOT WATER ODORS
(refer to cathodic protection) Bacteria in water s upply. Chlorinate water supply.
WATER TOO HOT Thermos tat set too high. Refer to TEM PERATURE REGULATION
section.
WATER HEATER SOUNDS Condensation dripping on burner. Refer to CONDENSATION above.
SIZZLING - RUMBLING S ediment at bottom of heater tank. Clean sediment from tank. Refer to
DRAINING.
SOOTING Improper combustion. Refer to Air Requirements.
Outlet polarity is re ve r s ed. Test polarity an d co rrect.
High ambient ro om temperature. Contact a s ervice agency to determine caus e.
Combustion air path restricted. Check exhaust venting and air openings in
bottom base pan f or obstructions or blockage.
BURNER WILL NOT STAY LIT –
GOES OUT 4-5 SECONDS
Defective gas valv e. Replace gas valve.
Lack of air supply.
Improperly installed vent piping.
Downdraft
VENT GAS ODORS
Poor Combustion
Shut off water heater immediately and contact
a service agency to determine cause.