State GPX 40 YXRS - Manual (Page 22)

22
These guidelines should be utilized by a qualified service agent. When calling for service notify the service agent
that this is a “Flammable Vapor Ignition Resistant” Product.
TROUBLESHOOTING GUIDELINES
Problem Cause Solution
Improperly sealed, hot or cold supply connection, Tighten threaded connections.
relief valve, drain valve, or thermostat threads.
Leakage from other appliances or water lines.
Inspect other appliances near water heater.
Condensation of flue products. Refer to CONDENSATE.
Thermal expansion in closed water system. Install thermal expansion tank (DO NOT plug T&P valve).
Improperly seated valve. Check relief valve for proper operation
(DO NOT plug T&P valve).
High sulfate or mineral content in water supply. Drain and flush heater thoroughly, then refill.
Bacteria in water supply. Chlorinate or aerate water supply.
Gas control knob not positioned correctly. Refer to LIGHTING INSTRUCTIONS.
Main gas supply off. Turn on main gas Shut-off valve.
Igniter tip more than 1/8" from pilot hood. Adjust ignitor tip.
Thermocouple malfunction. Replace pilot assembly.
Thermocouple TCO malfunction. Replace pilot assembly.
Melted insulation on ignitor wire or shorting Contact a service agency to determine cause.
PILOT WILL NOT LIGHT of ignitor wire.
High ambient room temperature.
Contact a service agency to determine cause.
Wire disconnected from spark ignitor. Reconnect wire connector to spark ignitor.
Broken electrode or electrical wire. Replace pilot assembly.
Piezo Ignitor generator fails to operate or Replace Piezo Ignitor generator.
malfunctions.
Thermocouple TCO malfunction.
Replace pilot assembly.
High ambient room temperature. Contact a service agency to
determine cause.
BURNER WILL NOT Dirty or clogged air intake screen. Clean and reinstall air intake screen.
STAY LIT Flame arrestor openings blocked. Contact a service agency to
determine cause.
Defective Gas Control. Replace Gas Control.
Dirty pilot burner. Clean pilot assembly.
Dirty or clogged air intake screen. Clean and reinstall air intake screen.
Thermocouple tip is not in contact with pilot flame. Insert thermocouple correctly.
Thermocouple malfunction. Replace pilot assembly.
Thermocouple TCO malfunction. Replace pilot assembly.
Defective Gas Control. Replace Gas Control.
Heater not lit or thermostat not on. Refer to LIGHTING INSTRUCTIONS.
Thermostat set too low. Refer to TEMPERATURE REGULATION.
Heater undersized. Reduce hot water use.
NOT ENOUGH Low gas pressure. Contact your gas supplier.
HOT WATER Incoming water is unusually cold. Allow more time for heater to re-heat.
Leaking hot water pipes or fixtures. Have plumber check and repair leaks.
High temperature limit switch activated. Contact a service agency to
determine cause.
WATER TOO HOT Thermostat set too high. Refer to TEMPERATURE REGULATION.
WATER HEATER SOUNDS Condensation dripping on burner. Refer to CONDENSATE above.
Sediment or calcium in bottom of heater tank. Clean sediment from tank. Refer to DRAINING
instructions in Maintenance section of manual.
Improper combustion. No adjustment available. Contact a service agency
to determine cause.
Lack of supply air.
Improperly installed vent piping.
Contact a service agency to determine cause.
Downdraft.
Poor combustion.
SIZZLING - RUMBLING
SOOTING
WATER LEAKS
LEAKING T&P VALVE
SMELLY ODORS
PILOT OUTAGE
VENT GAS ODORS