10
LP-613 Rev. 4.11.17
PART 4 – TROUBLESHOOTING
To save time and money, review the following initial diagnostic steps before calling for service.
Make sure the Control Panel is ON
If the display on the Control Panel is blank, make sure the power cord is plugged in and 5A
fuses on the main controller in the water heater are good
Make sure that the water heater is full of water
Make sure the cold and hot water lines are not plumbed in reverse
Ensure the cold water and gas supply lines are open
Make sure the water lines are not frozen
Ensure the temperature setting on the tempering valve is not too low
Make sure the water heater is connected to the correct gas supply
Check that supply and manifold gas pressures are in accordance with specifications
Ensure the temperature setting is not too hot
Ensure the water heater is supplied with water
Make sure the water heater is connected to the correct gas supply
Hot Water Temperature Fluctuates
at Tap
Ensure the water heater is supplied with water
Make sure the water heater is connected to the correct gas supply
Ensure the supply gas pressure is sufficient
The Blower Continues to Operate
After Combustion Stops
This is normal. The blower operates for one minute after combustion has stopped to vent the
remaining exhaust gas from the flue.
The Water Heater Makes Abnormal
Sounds During Operation
Check for cross contamination between exhaust and intake terminations
Ensure the venting installation complies with the installation manual.
Ensure supply gas pressure is sufficient. Insufficient gas pressure will cause unstable burner
flame and noise.
Table 2 – Troubleshooting Chart
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