TROUBLESHOOTING GUIDELINES
WATER HEATER CONTROL
TROUBLE SHOOTING
Please check guidelines below. For your safety, water heater service should be performed only by a qualified service technician.
Read the GENERAL SAFETY INFORMATION section first.
# | LED STATUS | PROBLEM | SOLUTION | |||
6 | A | B | C | Ignition/flame failure. | 1. Gas supply is turned off - pressure too low. Ensure | |
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| The water heater has reached the | supply and manifold gas pressures are within | ||
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| requirements in the installation manual. Manifold gas | ||
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| maximum number of retries and is | pressure is | |
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| currently locked out for one hour. | than 0.3” W.C. (75 Pa) replace the | |
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| Cycle the power to the water heater | 2. Low supply voltage - should be 115 | |
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| off and on to reset. | 3. Ensure flame sensor is making good contact with the | |
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| Service Note: | ||
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| burner flame, ensure flame is steady see #8 below. | ||
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| The resistance (ohms) of a hot surface | 4. Ensure the flame sensor is clean - use ultra fine steel | |
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| ignitor will increase over time. If the | ||
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| resistance at room temperature is near | wool or | |
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| 18.8 ohms - consider replacing the ignitor | 5. Ensure the hot surface ignitor is positioned to provide | |
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| as a preventative measure. | ||
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| consistent ignition. | |
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| 6. Check for any cracks in ignitor assembly ceramic | |
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| insulators - replace ignitor assembly if damaged. | |
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| 7. Check resistance of ignitor at room temperature (77ºF) | |
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| (25°C) at the plug end. Replace ignitor if resistance is | |
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| not within 11.5 and 18.8 ohms at room temperature. | |
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| 8. Ensure the correct size of vent pipe (2”, 3”, 4”) was | |
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| used per installation manual for vent length. Using larger | |
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| pipe than required may cause excessive air turbulance | |
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| in the combustion chamber. | |
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| A | B | C | Self diagnostic tests have found a problem | 1. Turn the power off for | |
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| with the gas valve driver circuit, internal | clear these error codes. | |
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| microprocessor, or other internal circuits. | 2. If any of these error codes persist or cannot be cleared- | |
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| replace the | |
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8 |
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9 |
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| A | B | C | Flame signal has been sensed out of | 1. Turn the power off for | |
10 |
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| proper sequence. | again to clear this error code. | |
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| 2. Replace the | |
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| A | B | C | Water temperature in the tank has | 1. Turn the power off for | |
11 |
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| exceeded 195°F (91°C) and has | to clear this error code. | |
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| activated the ECO. | 2. Replace the | |
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| A | B | C | The self diagnostic check detected one | 1. Press and release temperature adjust buttons. If the | |
12 | or both of the temperature adjust buttons | above action does not clear the error, the control will | ||||
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| are stuck. | continue to regulate water temperature at the last setting. | |
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| However, settings will no longer be adjustable - the | |
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| control should be replaced. | |
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| A | B | C | The self diagnostic test has detected the | 1. Turn the power off for | |
13 | water temperature sensor (thermistor) is | to clear this error code. | ||||
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| either open or shorted. | 2. Replace the | |
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