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  • REMOVAL AND REPLACEMENT OF THE GAS CONTROL VALVE / THERMOSTAT INVOLVES THE DISCONNECTION OF GAS PIPING, MANIFOLD TUBE, PILOT TUBE, AND THERMOCOUPLE. IT IS RECOMMENDED THAT THIS PROCEDURE BE PERFORMED BY A QUALIFIED SERVICE TECHNICIAN.

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    PROBLEM POSSIBLE CAUSE(S) CORRECTIVE ACTION

    INSUFFICIENT
    HOT WATER

    • Low gas pressure
    • Thermostat set too low
    • Sediment or lime in tank
    • Water heater too small
    • Check with gas utility company
    • Turn temperature dial to higher setting
    • Drain/flush-provide water treatment if needed
    • See Sizing Guides.
    SLOW HOT WATER RECOVERY
    • Thermostat set too low
    • Heater too small
    DRIP FROM RELIEF VALVE
    • Excessive water pressure
    • Heater stacking
    • Use a pressure reducing valve and relief valve.
    • Lower the thermostat setting
    SMELLY WATER Sulfides in the water Replace the aluminum anode with a KA90 anode
    CONDENSATION Temperature setting too low Increase the temperature setting. See owner's manual.
    THERMOSTAT FAILS TO SHUT OFF Improper calibration
    • Contact technician to replace thermostat
    • Contact technician to replace thermostat
    PILOT WILL NOT LIGHT OR REMAIN LIT
    • Low gas pressure
    • Air in gas line
    • No gas
    • Dirt in gas lines
    • Pilot line or orifice clogged
    • Thermocouple connection loose
    • Thermocouple
    • Thermostat ECO switch open
    • Check with gas utility company
    • Bleed the air from the gas line
    • Check with gas utility company
    • Notify utility-install dirt trap in gas line
    • Clean, locate source and correct
    • Finger tighten-then 1/4 turn with wrench
    • Contact technician to replace thermocouple
    • Contact technician to replace thermostat
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