State GPH-90N - Manual (Page 31)

Service Instructions
0610 31 319172-000 Rev. 00
GAS WATER HEATERS
HILIMIT TEMPERATURE SWITCH REPLACEMENT
This instruction has been prepared to acquaint you with the service of your gas-fi red water heater. It is your responsibility to
ensure that your water heater is properly installed and maintained.
Failure to follow the instructions in this service instruction sheet may result in serious bodily injury and/or property
damage. Thoroughly read and understand all instructions before you attempt to install, operate or service this heater.
Maintenance and service requires trade knowledge in the areas of plumbing, electricity and gas. If you lack these skills or
have diffi culty understanding these instructions you should not proceed. Enlist the help of a qualifi ed service technician to
service this water heater.
To Remove:
Disconnect the electrical power to the water heater.
Unlock the door by rotating the lock counter-clockwise
with a wide, slot screwdriver.
Release the top and bottom door pins by prying the pins
out, using a small screwdriver.
Open the door (the door remains fastened to the left
side panel).
Remove the ten screws that secure the front cover of
the heat engine. Remove the front cover of the Heat
Engine.
Remove the two screws securing the circuit board and
partially extract it.
Carefully disconnect the HiLimit wiring harness plug from
the circuit board.
Cut the plug off.
Remove the HiLimit Temperature Switch.
To Install:
Extract one pin from the new plug, feed the new HiLimit
Temperature Switch around the heat exchanger and re-
insert the pin into the plug.
Carefully reconnect the HiLimit wiring harness plug to
the circuit board.
Slide the circuit board into its proper position and secure
using the two screws.
Reassemble the front cover of the Heat Engine.
Close and lock the door.
Reconnect the electrical power to the water heater.
Restart the water heater following the “Lighting
Instructions” found in the Operating Manual.
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Access To
Door Pins
Door
Lock