Temperature Sensor And Cable Removal/Replacement - A.O. Smith GPVL-50 Service Handbook

TEMPERATURE SENSOR AND CABLE
Important: Do not remove the entire gas control assembly
from the water heater.
Important: Use only factory authorized replacement parts.
If you lack the necessary skills to properly perform the
installation, you should not proceed, but get help from a
qualifi ed service technician.
Tools required:
•
T15 Torx screwdriver
•
Flat-blade screwdriver
Removing Temperature Sensor and Cable
1. Set the gas control valve/thermostat to its lowest setting
by turning the knob counter-clockwise to the VAC point
(see Figure 20).
2. Turn gas control switch to the "OFF" position and turn
off the gas supply to the unit (see Figure 20).
3. Disconnect the electrical power to the water heater
from the wall outlet.
4. Remove the Electronic Control Module as outlined
in "Removing Electronic Control Module" section
above.
Note: When removing the control module from the
gas control assembly, disengage the pins on the valve
module without causing damage.
5. Remove the Valve Module as outlined in "Removing
Valve Module" section above.
6. Use a screwdriver to pry under the sensor retainer
fi nger to remove the temperature sensor and cable
(see Figure 25).
7. Re-assemble in the reverse order.
Note: When replacing the valve, do not apply pressure
with the hand on the valve pins.
Note: During re-assembly, align the pins on the valve
module to their proper location in the control module
without causing damage.
TEMPERATURE SENSOR AND
CABLE REMOVAL/REPLACEMENT
SENSOR
RETAINER "FINGER"
NOTE: USE CAUTION
WHEN REPLACING
THE VALVE TO NOT
APPLY PRESSURE
ON THE VALVE PINS.
Figure 25
TEMPERA-
TURE SENSOR
CABLE UNDER
THE RETAINING
TAB
THREADED CONTROL
FITTING
(DO NOT REMOVE
FROM WATER HEATER)
21