The Electronic Thermostat; Water Temperature Adjustment; Diagnostic Led Light; Overriding The Electronic Thermostat - Sears Kenmore 153.589400 Use & Care Manual

The Electronic Thermostat

IMPORTANT: If installed - the Assurelink
Controller (purchased separately) must be removed before
attempting to adjust the thermostat. NOTE: for the Electronic
Thermostat (ET) changes to remain in effect the Assurelink
Home Automation Controller ( must not be reconnected, also read
the "Water Temperature Regulation" under the "Operating Your
Water Heater" section. If the instructions are not clear, contact
a qualifi ed service technician.

Water Temperature Adjustment

The Electronic Thermostat may be access by removing the upper
Access Door (See Figure 15). Adjusting the water heater by
rotating the set point knob right or left for the desired temperature
(See Figure 14). The Electronic Thermostat consists of an
electronics box that contains a low voltage power supply, the
thermostat set point knob, relays to switch between the upper and
lower heating elements, one control thermistor, a connector for
the lower element control thermistor, microelectronics to convert
the thermistor signals and perform switching and other logic
functions, and a connector to tie the Electronic Thermostat (ET)
to the Assurelink / Home Automation Controller (purchased
™
separately) located on the top of the water heater. The majority
of the self-diagnostics are located in the Electronic Thermostat
(ET), including the dry-fi re protection intelligence. The thermostat
circuit is designed so that when the upper heating element calls
for heat, the power is directed to that element even if the lower
element is also calling for heat.

Diagnostic LED Light

The Green/Red LED light indicates the status of the electronic
thermostat (Figure 14).
• 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 fl ash code sequence is
to consist of 1/2 second fl ashes 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 fl ash pattern
repeats). After the 5 seconds are completed, the fault indication
cycle is repeated starting with the fi rst 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.

Overriding The Electronic Thermostat

With the installation of an Assurelink
Controller (purchased separately), the water heater temperature
may be adjusted remotely (See instructions supplied with
Assurelink / Home Automation Controller).
™
/ Home Automation
™
/
™
/ Home Automation
™
17
Electrical Shock Hazard
Do not remove the plastic
guard from over wiring.
Do not touch electrical wiring.
Failure to do so can result in
death or electrical shock.
ELECTRONIC THERMOSTAT (ET)
DIAGNOSTIC
LED LIGHT
PLASTIC GUARD
REMOVE ONLY AFTER POWER IS TURNED OFF
(WHEN REPLACING ELEMENT)
FIGURE 14
ELECTRONIC THERMOSTAT (ET)
ELECTRONIC
THERMOSTAT (ET)
ACCESS DOOR
FIGURE 15
NOTE: Remote Access will be disabled when the Assurelink
/ Home Automation Controller (purchased separately) is
disconnected from the junction box wiring harness.
ECO RESET
BUTTON
SETPOINT
UPPER
ELEMENT
THERMOSTAT
SETPOINT KNOB
THERMISTOR
WIRE HARNESS
KNOB
™