TEST OR INSPECTION
WATER HEATER (CONT)
4. FUEL PUMP AND IGNITION DRIVE MOTOR WILL NOT START WITH HEATER CONTROL SWITCH IN HEATER ON POSITION (CONT).
Step 6. Check wire No. 4 for continuity using the following procedures:
a. Disconnect wire No. 4 from relay K2-A1, and disconnect other end of wire at combustor air pressure switch S3.
b. Use multimeter to check for continuity between ends of wire No. 4 while it is being flexed along its entire length.
Reinstall wire No. 4 back onto combustor air pressure switch S3 and onto relay K2-A1, if continuity is indicated.
Replace wire No. 4 between combustor air pressure switch S3 and relay K2-A1 if anything other than continuity is indicated.