Whirlpool water heater age decoders, water heater manual sources.
Our photo at page top shows an oil fired water heater with a backpressure problem and other safety concerns like a missing extension tube on that relief valve, and maybe a missing draft regulator and perhaps an oil line that is not protected from damage.
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The Green/Red LED light indicates the status of the electronic thermostat (See Figure 10A).
• Green LED will signal normal operation. The green
LED will blink 2 times per second to indicate that power is
applied to the upper heating element and at a faster rate
(4 times per second) to indicate that the lower heating element is powered.
• Red LED will fl ash error codes. If a fault is detected by the electronic thermostat, the LED light indicator will use the red LED to indicate the fault detected.
The flash code sequence is to consist of 1/2 second flashes of the red LED each separated by a 1/2 second off period.
The number of fl ashes indicates the fault code number.
(See diagnostic code chart section in this manual).
After the last 1/2 second “on” period, the LED will remain
off until a total of 5 seconds has elapsed for the fault indication cycle (there is a 5 seconds delay before the fault
flash pattern repeats).
After the 5 seconds are completed,
the fault indication cycle is repeated starting with the first
1/2 second-fl ash. The fl ash sequence will be repeated as
long as the fault remains.
Only one fault can be declared
at a time.
NOTE: the green LED is turned off when a fault
code is being displayed, even though the heater may be
operating in limp mode with an element on. See diagnostic code chart section in this manual.
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