GE GEH50DEED Technical Service Manual page 46

The sensor is inserted into a clip that is attached
to the evaporator inlet tube. The sensor location
is insulated with mastic. (See
.)
Views
The rear shroud cover and rear shroud must be
removed to access the evaporator inlet sensor. (See
Machine Compartment Covers
Evaporator Inlet Sensor
Note: When installing the evaporator inlet sensor, be
sure to insulate the sensor location with new mastic
(part #WS03X10075).
Mastic
Note: Sensors T3A, T3b, and T4 are supplied as an
assembly (part #WS17X10014).
Component Locator
.)
Clip
Evaporator Inlet Tube
– 46 –
Evaporator Outlet Sensor
The evaporator outlet sensor (T3b) provides the
control with evaporator outlet temperature during
sealed system operation.
The control checks the sensor to confirm:
1. Temperature difference between T3a and T3b is
greater than 5°F after 30 minutes compressor
run time.
2. The T3a, T3b, and T5 sensors are all within 15°F
of each other before the compressor starts.
3. The electronic expansion valve (EEV) is operating
properly and valve rotation is within range.
4. The condition of the sensor is either open or
shorted. The sensor is considered open if the
voltage at control board location T3b is greater
than 4.88 VDC, and shorted if less than 0.098
VDC.
if any of the above tests fail, the control will stop
the sealed system and operate the water heater in
electric mode.
Specific failures associated with the evaporator
outlet sensor can initiate fault codes Fd, FF, and F6.
(See
Service Mode.)
The sensor is inserted into a clip that is attached
to the evaporator outlet tube. The sensor location
is insulated with mastic. (See
.)
Views
The rear shroud must be removed to access the
evaporator outlet sensor. (See
.)
Covers
Evaporator Outlet Sensor
Clip
Component Locator
Machine Compartment
Evaporator Outlet Tube
(Continued Next page)