TM 5-4520-253-13
l N S P E C T / T E S T / R E M O V E / l N S T A L L H E A T E R - O F F - F A N S W I T C H ( C O N T)
TESTING:
1. Disconnect power cable and open control box.
HEATER-OFF-FAN switch will appear as
illustrated.
2. Check switch for continuity as follows:
a. Between terminals 6 and 1, switch in FAN position.
b. Between terminals 3 and 2, switch in FAN position.
c. Between terminals 3 and 4, switch in HEATER position.
Terminal 5 is not used in this application.
3. There must be no continuity between terminals 6 and 1, 3 and 2, or 3 and 4 when HEATER-OFF
FAN switch is in OFF position.
4. If HEATER-OFF-FAN switch fails any of above tests, replace switch.
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