Bradford White U-TW4-75S-76R-3N - Manual (Page 25)

U TTW SERVICE PROCEDURE VI
Blower Temperature Switch Testing
and Replacement
Blower Temperature Switch
Replacement.
WARNING
115 volt potential exposure. Use caution
to avoid personal injury.
Step 1. Position gas control power switch to the “OFF” position
and unplug water heater from wall outlet.
Step 2. Remove the three screws (Phillips screw driver) from the
control access cover on blower and remove cover
(see photo 20 and 21).
21
Step 3. Locate blower temperature switch (see photo 17)
Step 4. Disconnect red and yellow wire leads from switch.
Step 5. With an appropriate tool such as side cutters, snip the
retaining lug from the blower housing to allow removal of
temperature switch (see photo 18).
Step 6. Remove switch from blower housing.
Step 7. Install new switch. Be sure switch is properly seated in
mounting area.
Step 8. Reconnect red and yellows wires to new switch. Wires are
interchangeable with either terminal.
Step 9. Position gas control power switch to the “ON” position
and verify proper heater operation.
Step 10. Replace control access cover from step 2.
Blower temperature
switch location
22
Snip retaining lug
from blower housing
23
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Control Access
Cover Screws
20
Gas Control shown in the “OFF” position
R
25