Gas Valve LED Codes
LED Status | Problem |
| Solution |
○ ○ ▼ A B C |
| 1. | Check that the earth ground connection is properly |
● ○ ○ ● ○ ○ | An open earth ground circuit to the | 2. | connected. |
| ignition system. | Check that the ground conductor on the water | |
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| heater is properly connected. |
○ ○ ▼ A B C |
| 1. | Check proper connection of line |
● ○ ● ○ ● ○ | Wiring error or a high resistance to | 2. | neutral and hot wires. |
| earth ground. | Check that the water heater is securely connected | |
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| to earth ground. |
○ ○ ▼ A B C | Pressure switch remained closed | 1. | Pressure switch wiring is incorrect. |
● ○ ● ○ ○ ○ | longer | 2. | Replace pressure switch. |
than 5 seconds after the call for | |||
| heat began. |
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○ ○ ▼ A B C | Pressure switch remained open lon- | 1. | Pressure switch wiring is incorrect. |
● ○ ● ○ ○ ● | thanger 5 seconds after the combustion | 2. | Pressure switch tubing is not connected correctly. |
| blower was energized. | 3. Air intake or exhaust obstructed. | |
○ ○ ▼ A B C | Error in the hot surface ignitor cir- | 1. | Check that all wiring is correct and secure. |
● ○ ● ○ ● ● | cuit. | 2. | Replace hot surface ignitor. |
○ ○ ▼ A B C | System in lockout. | 1. | Gas supply is off or too low to operate. |
● ○ ○ ● ● ○ |
| 2. | Hot surface ignitor not positioned |
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| correctly. |
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| 3. | Low voltage to the water heater. |
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| 4. | Electric polarity to unit is incorrect - test and cor- |
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| rect. |
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| 5. | Combustion |
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| vice agency. |
○ ○ ▼ A B C |
| 1. | Turn power to the water heater off for 10 seconds |
● ○ ○ ○ ● ● | Problem in the gas valve driver cir- |
| and then back on. |
| cuit. | 2. | Replace gas control valve. |
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| ||
○ ○ ▼ A B C |
| 1. | Turn power to the water heater off for 10 seconds |
● ○ ● ● ● ○ | Problem with the internal circuit. |
| and then back on. |
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| 2. | Replace gas control valve. |
○ ○ ▼ A B C |
| 1. | Turn power to the water heater off for 10 seconds |
● ● ● ● ● ● | Problem with the internal circuit. |
| and then back on. |
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| 2. | Replace gas control valve. |
○ ○ ▼ A B C | Flame signal sensed out of | 1. | Replace gas control valve. |
● ○ ○ ○ ● ○ | proper sequence. |
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○ ○ ▼ A B C | ECO activated. | 1. | Replace gas control valve. |
● ○ ○ ● ● ● |
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○ ○ ▼ A B C | One of the temperature adjust | 1. | Press and release each of the buttons once. |
● ○ ● ● ○ ○ | buttons stuck closed. | 2. | Replace gas control valve. |
○ ○ ▼ A B C | Water temperature sensor is either open | 1. | Check that all wiring is correct and secure. |
● ○ ● ● ○ ● | or short circuited. | 2. | Replace gas control valve. |
○ ○ ▼ A B C |
| 1. | Check for correct wiring to FV sensor. |
● ○ ○ ● ○ ● | Unit shuts down. | 2. | Check for open circuits to FV sensor. |
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| 3. | Replace FV sensor. |
○ ○ ▼ A B C |
| 1. | FV sensor detected presence of flammable vapors. |
● ○ ○ ○ ○ ● | Unit shuts down and in lockout. | 2. | Contact a service agency. |
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CAUTION: Make certain power to water heater is “OFF” before removing protective cover FOR ANY REASON.
CAUTION: Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. VERIFY PROPER OPERATION AFTER SERVICING.
CAUTION: For your safety DO NOT attempt repair of gas piping, remote control, burners, vent connectors or other safety devices. Refer repairs to qualified service personnel.
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