16
UPV75 Service Procedure II – Pilot Inspection, Testing, and
Replacement
Pilot Inspection, Testing, and Replacement
Step 1. Position the gas control power
switch to the “OFF” position and
unplug the heater from the wall
outlet.
Step 2. Turn OFF gas supply to the water
heater.
Step 3. Remove the outer jacket door.
Step 4. Disconnect the pilot tube (
7
/
16
”
wrench) and feedline (¾” wrench)
from the gas control.
Step 5. Disconnect the igniter/flame sensor
wire from the gas control.
Step 6. Remove the (4) ¼” hex drive
screws holding the right side inner
door in place.
Step 7. Remove the (4) ¼” hex drive
screws holding the left side burner
door in place.
Step 8. Remove the burner assembly
from the combustion chamber.
Step 9. Remove the pilot assembly from
the burner assembly (¼” nut
driver).
Step 10. Visually inspect the igniter/flame
sense wire for damage. Replace
the pilot if damage is found.
Step 11. With a multi-meter set to the
ohms setting, check continuity
through igniter/flame sense wire.
Replace the pilot if there is no
continuity.
Step 12. Visually inspect the igniter/flame
sense electrode for deterioration.
Replace the pilot as necessary.
Electrode should not be in
contact with pilot hood, if so,
carefully adjust electrode to a gap
distance of
3
/
32
” (.09) from the pilot
hood.
16
