Test 5 - Calling For Heat - No Inducer Operation - A.O. Smith Master-Fit 100 Series Service Handbook

TEST 5 CALLING FOR HEAT
–
CONDITIONS:
• Power On – No Hot Water.
• Plugs in Receptacles.
• Red "Call for Heat" LED-ON.
• Inducer "Off".
IF.........
Pin 1 to ground check has no
voltage
Pin 1 to ground has voltage
Pin 3 to ground has no voltage
26
NO INDUCER OPERATION
–
"call for heat"
LED indicator
"Diagnostic LED
indicator"
THEN............
Reset control by interrupting power - note possible reasons for this
from flashing LED code.
Replace ignition board.
Proceed
Check wiring harness and plugs.
Replace inducer.
Servicing should only be performed by a Qualified Service Technician