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SUF SERVICE HANDBOOK
TROUBLESHOOTING
State Water Heaters Technical Training Department
Ashland City, Tennessee © 2004
25 STC-077
BLOWER
STEP 8: CHECK FOR 120 VAC TO BLOWER FROM CN2 PLUG PIN 1 AND 2.
Condition:
• Reconnect all plugs to control board.
• On/Off switch is on.
• Call for heat is activated.
Insert meter probes into back of CN2 plug on pins 1 and 2 with CN2 plugged in, power on, and a
call for heat activated.
STEP 8
120 VAC TO BLOWER
IF… AND THEN
120 VAC is not
present
replace the control board if call for heat is active and Step 7 has been
performed and results were successful — continue to Step 9A.