Service Manual

UTTW SERVICE PROCEDURE VI

Blower Temperature Switch Testing

and Replacement

Blower Temperature Switch

Replacement.

WARNING

115 volt potential exposure. Use caution

to avoid personal injury.

Step1. Position gas control power switch to the “OFF” position

and unplug water heater from wall outlet.

Step 2.Remove the three screws (Phillipsscrewdriver)from the

control access cover on blower and remove cover

(see photo 20 and 21).

Step 3. Locate blowertemperature switch (see photo 17)

Step4. Disconnectred and yellow wire leads from switch.

Step5. With an appropriate tool such asside cutters, snip the

retaining lug from t

he blower housing to allow removalof

temperature switch (see photo 18).

Step6. Remove switch from blower housing.

Step7. Install new switch. Be sure switch is properly seatedin

mounting area.

Step8. Reconn

ectred and yellows wirestonew switch. Wires are

interchangeable with eitherterminal.

Step9. Position gas control power switch to the “ON” position

and verify proper heater operation.

Step 10. Replace control access cover from st

ep 2.

Blower temperature

switch location

Snip retaining lug

from blower housing

Page 25

Control Access

Cover Screws

Gas Control shown in the “OFF” position