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TROUBLESHOOTING
PROBLEM
It takes a long time to
get hot water at the
fixtures.
The water is not hot
enough.
The water is too hot. • Is the set temperature set too high? (p. 42)
The hot water is not
available when a
fixture is opened.
The hot water turns
cold and stays cold.
Fluctuation in hot
water temperature.
Unit does not ignite
when water goes
through the unit.
• The time it takes to deliver hot water from the water heater to your
fixtures depends on the length of piping between the two. The longer the
distance or the bigger the pipes, the longer it will take to get hot water.
• If you would like to receive hot water to your fixtures more quickly, you
may want to consider a hot water recirculation system. (p. 35)
• Compare the flow and temperature. See the charts on p. 56.
• Check cross plumbing between the cold water lines and hot water lines.
• Is the gas supply valve open fully? (p. 37)
• Is the gas line sized properly? (p. 28)
• Is the gas supply pressure sufficient? (pp. 28 and 45)
• Is the set temperature set too low? (p. 42)
• Make sure the unit has a 120 VAC, 60 Hz power supply.
• If you are using the remote controller and/or built-in controller, is the
power button turned on?
• The time it takes to deliver hot water from the water heater to your
fixtures depends on the length of piping between the two. The longer the
distance or the bigger the pipes, the longer it will take to get hot water.
• Is the gas supply valve open fully? (p. 37)
• Is the water supply valve open fully? (p. 37)
• Is the filter on the cold water inlet clean? (p. 45)
• Is the hot water fixture open sufficiently to draw at least 0.5 GPM
(1.9 L/min) through the water heater? (p. 41)
• Is the unit frozen? (p. 44)
• Is there enough gas in the tank / cylinder? (For Propane model)
• Is it plumbed backwards with reverse plumbing?
• Is the flow rate enough to keep the water heater running? (p. 41)
• If there is a recirculation system installed, does the recirculation line have
enough check valves? (p. 35)
• Is the gas supply valve open fully? (p. 37)
• Is the filter on the cold water inlet clean? (p. 45)
• Are the fixtures clean of debris and obstructions?
• Is the filter on the cold water inlet clean? (p. 45)
• Is the gas line sized properly? (p. 28)
• Is the supply gas pressure sufficient? (pp. 28 and 45)
• Check for cross connection between cold water lines and hot water lines.
• Is the power on the water heater?
• Is the gas on?
• Is the flow rate over 0.5 GPM (1.9 L/min)? (p. 41)
• Is the filter on the cold water inlet clean? (p. 45)
• Check for reverse connection and cross connection. (p. 30)
• If you use the remote controller and/or built-in controller, is the power
button turned on? (p. 41)
• Check if the inlet temperature is too high. If it is too close to the set
temperature, the water heater will not activate.
46
Page
Troubleshooting
SOLUTIONS
Owner's Guide
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