A.O. Smith BTH 150 - Gas Valve & Control Board Electrical Checks

A. O. Smith Water Products Company Service Handbook
Irving, Texas 2000
©
Training Department
19
TROUBLESHOOTING
STEP 2 - CHECK CONTINUITY THROUGH THE VALVE COIL
STEP 2. Check Continuity Through The Valve
Coil
• Power off
• Gas valve - coil continuity check
• Disconnect wires from gas valve
• Multimeter set to scale.
IF…
meter does not indicate +/- 7.5% of table
meter indicates +/- 7.5% of table
BTH Model Gas OHMS Resistance
120 N 100
150, 199 N 560
150, 199 P 63
250 N 63
OHMS RESISTANCE TABLE
Usually a defective coil will be indicated by a "0" or "1" on the meter.