Blower, 120 vac to blower, Iipii|m – A.O. Smith 960 through 967 User Manual

Page 26

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BTH S E R V I C E H A N D B O O K

T R O U B L E S H O O T I N G

BLOWER

STEP 8A

120 VAC TO BLOWER

120V

|iipii|M

« 3 V

Blower

. - 3 2 1

CN6 I

STEP 8A: 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.

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.

120 VAC is present

blower is not
running

BTH 250, 962 & 966 Series only continue to Step 8B
all other models — check CN2 plug connection, replace blower.

120 VAC is present

blower is running

BTH 250, 962 & 966 Series only continue to Step 8C
all other models — continue to Step 9A.

Technical Training Department

TC-044 Revision 6

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