State GPH-90N - Manual (Page 41)

Service Instructions
0610 41 319172-000 Rev. 00
GAS WATER HEATERS
EXHAUST VENT HIGH-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.
Remove panels to gain access:
Door opening
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 top casing (front)
Use a screwdriver to remove the six screws securing
the top casing.
Lift up and remove casing top (front).
Remove the right side panel
Use a screwdriver to remove the screw from the bottom,
front of the right side panel.
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Remove the three screws from the right side panel
towards the rear of the unit.
Remove the screw from the top of the unit.
Push the panel back and lift out.
To Remove:
Disconnect the electrical power to the water heater.
Carefully disconnect the two wires from the High-
temperature Switch.
Remove the two screws securing the High-temperature
Switch to the Condensate Trap.
Remove the High-temperature Switch.
To Install:
Secure the new High-temperature Switch with the two
screws.
Carefully reconnect the two wires to the High-temperature
Switch.
Reassemble all the casing panels in the reverse order.
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
Screws
Top Casing
(Front)
Screws Screws
Top
Casing (Front)