Before You Call For Service…
Troubleshooting Tips
Save time and money! Review the charts on the following pages first and you may not need to call for service.
Problem | Possible Cause | What To Do |
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Not enough or no hot water. | Water Shutoff valve is not fully opened. | ● Check shutoff valve and open fully. |
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| Hot water faucet is not fully opened. | ● Open hot water faucet completely. |
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| (The main burner goes off when |
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| incoming water volume is |
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| inadequate.) |
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| Water piping is frozen. | ● Allow piping to thaw. |
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| No electricity or water supply is cut off. | ● Check that proper power is being |
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| supplied and/or water supply is |
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| adequate. |
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| Unit is not “ON”. | ● Turn the unit “ON” by the button on |
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| the remote control. |
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| The temperature may be set too low. | ● Increase the temperature setting. |
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| Mixing Valve Malfunctions | ● Check and replace if necessary. |
| (if applicable) |
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| Error code displayed on remote control. | ● See instructions for Error Code and if |
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| required, contact a dealer for service. |
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| Not enough water demand. | ● Increase water flow. |
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| Water inlet filter clogged. | ● Clean water inlet filter. |
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| Fixture aerator is clogged. | ● Clean aerator. |
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| Scale buildup in heat exchanger. | ● Check for error code. If required, |
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| contact a dealer for service. |
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| Hot and cold water lines reversed. | ● Reverse water connections. |
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Water not hot enough. | The temperature may be set too low. | ● Increase the temperature setting. |
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| The gas valve is not fully opened. | ● Check and open the gas valve fully. |
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| Gas supply pressure is low. | ● Call your gas company to verify the |
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| gas meter and gas piping size. |
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| Bleed over in one of the hot water | ● Call dealer for service. |
| fixtures. |
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Water too hot. | Temperature is set too high. | ● Decrease the temperature setting. |
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| Water shutoff valve is not fully opened. | ● Check shutoff valve and open fully. |
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| Small amount of water has been heated. | ● Allow more water to flow. |
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Fan continues to rotate after hot water | This function is to supply hot water | ● Normal operation. There is no need |
faucet is closed. | when the hot water faucet is reopened. | to call for service. |
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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 electrical wiring, gas piping, remote control, burners, vent connectors or other safety devices. Refer repairs to qualified service personnel.
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