Step 2: Test For 24Vac Between Black And Orange On Damper Pc Board; Step 3: Test The Three Amp Fuse - State Water Heaters SBD71120 Service Handbook

STEP 2: TEST FOR 24VAC BETWEEN BLACK AND ORANGE ON DAMPER PC
BOARD
IF
24VAC is present - damper NOT opening
24VAC is not present.
24VAC present - Damper Opens
CONDITION:
• Damper rotates continuously.

STEP 3: TEST THE THREE AMP FUSE

CONDITION:
• Test via the terminals on the head of the fuse or by removing the fuse and testing across the blades.
• Verify that there is 120 VAC to the thermostat. Once verified set the meter to check for continuity and
perform the checks shown in figure below and on next page.
Servicing should only be performed by a Qualified Service Technician
THEN
• Check Service Switch Position. Replace Damper
Assembly.
• Check Wiring Harness to Thermostat.
• Continue to Step 3.
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