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SBD TANK TYPE HEATERS
SERVICE HANDBOOK
Technical Training Department
Ashland City, TN ©2003
34
STEP 14A PILOT VALVE - OHM TEST
SBD 120 – 400 GAS VALVE
STEP 14A. PILOT VALVE - OHM TEST. If pilot assembly is sparking but no pilot flame
is established, disconnect the pilot valve solenoid leads. Using a multimeter, (set to read
ohms) test for 20* ohms resistance +/- 5 through the solenoid coil.
NEHT FI
The meter dose not read 20 ohms plus or
minus 5:
• Replace gas valve
The meter does read 20 ohms plus or
minus 5:
• Gas valve should work. Also check that
pilot gas is present and pilot tube or
orifice are not blocked