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11/6/2018
© 2015 Rinnai America Corporation
PROPRIETARY and CONFIDENTIAL
Enhancing Lives By Changing The Way Water Is Heated
Heat Exchanger Thermistor Removal
Ensure unit is isolated from water, power and gas. Open a fixture to
release any hot water or water pressure remaining in the system.
1. Remove the heat exchanger thermistor by pulling retainer clip off
thermistor. Pull thermistor out of position. Ensure O-ring is intact
and in good condition before reinstalling it. Make sure the retainer
clip is installed in the proper orientation. After reinstalling the clip
pull on the thermistor, (not the wire) to ensure it is held into
position and cannot be pulled out of connection.
2. Follow the thermistor wires down about ten inches to a green
electrical connection. Unplug that connector and pull the thermistor
out of the unit.
Thermistor location
1
Remove retainer clip
