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Drain Valve; Element Covers; Temperature Sensors - GE GEH50DEED Technical Service Manual

Hybrid water heater
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Drain Valve

repair or replacement of the drain valve should be
performed by a licensed plumber.
The drain valve, located at the front bottom of the
tank, has a standard garden hose fitting. After
attaching an appropriate length hose, use a flat
blade screwdriver to open the valve.
The use and care manual recommends the
consumer drain several quarts of water from the
tank every month to prevent sediment buildup in
the bottom of the tank.
Drain Valve
If flushing the tank, disconnect power, but leave the
water supply turned on. The flow of cold water into
the tank helps to stir the sediment at the bottom
and force it out through the drain hose.
if replacing a heating element or pressure relief
valve, disconnect power, turn off the water supply,
and open a faucet somewhere in the home. Drain
the tank to the appropriate level and make the
necessary repair.
Note: When flushing or draining the tank, always
allow water to flow for several minutes at a tub
faucet after the repair. This will help to purge any
air from the system and remove any stirred-up
sediment that could clog other home faucets that
contain screens.

Element Covers

The upper element cover must be removed to
access the T2 tank sensor, thermal cutout (TCO), and
the upper element. (See
The lower element cover must be removed to
access the lower element. (See
.)
Views
Each cover is attached with two T20H Torx security
screws. The Styrofoam insulation under the upper
element cover pulls straight out.
Element Cover

Temperature Sensors

The water heater has five sensors. Four of the
sensors provide the control with sealed system
information. The T2 sensor provides information on
the tank temperature.
All sensors have a negative coefficient resistance.
As the temperature increases, the resistance value
decreases.
Temperature Sensors
Sensor Description Normal
T2
Tank
T3a
Evaporator
inlet
T3b
Evaporator
outlet
T4
Compressor
outlet
T5
Ambient
Note: Sensor resistance value is continuously
provided to the main control. To accurately test
a sensor, measure its resistance value at room
temperature.
– 44 –
Component Locator Views
Component Locator
Styrofoam Insert
resistance
resistance
temperature
range in
at 77°F
range
ohms
30°F -
34K -
160°F
1.75K
15°F -
57K - 3K
130°F
15°F -
57K - 3K
130°F
30°F -
188K - 2K
250°F
15°F -
57K - 3K
130°F
(Continued Next page)
.)
10K
10K
10K
55K
10K
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