Service Procedure Viii: Hi Limit Switch Removal And Replacement - Bradford White ElectriFLEX HD CEHD 50 Service Manual

Hi Limit Switch Removal and Replacement
Hi Limit Switch Removal
1. STOP, DANGER! Turn power "off" to water heater.
2. Open control box door or remove lower cover. Remove
insulation. Remove plastic cover from hi limit switch.
3. Disconnect wires from Hi Limit switch terminals. NOTE: It
may be necessary to label wires for proper re-connection
to new Hi Limit switch.
4. Note Hi Limit Switch setting for proper setting of new Hi Limit switch.
5. Slide Hi Limit switch downwards out of mounting bracket.
Hi Limit Switch Replacement
1. Use a stiff brush to remove any debris or loose scale from tank surface where new Hi Limit switch will be installed.
2. Slide new Hi Limit switch up into thermostat bracket until it snaps into place. IMPORTANT! Hi Limit switch must be set
completely flat or flush to the tank surface. An improperly installed Hi Limit switch will cause improper water heater
operation.
3. Refer to wiring diagram located inside of the control box door and reconnect wires to the thermostat. Be sure wire
connections are snug and corrosion free. Do not overtighten, doing so may damage Hi Limit switch.
4. Set Hi Limit switch to original Hi Limit switch setting found on the old Hi Limit switch.
5. Restore power to water heater and verify proper heater operation.
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Service Procedure VIII:
WARNING
High voltage exposure. Use caution when making
voltage checks to avoid hazard to life or property.
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