A Better Way to Heat Water 

Residential Gas Troubleshooting Guide

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.

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