Gas Valve Test - State Water Heaters Utra-Force STC-077 Service Handbook

STEP 12
24 VAC TO GAS VALVE
STEP 12: CHECK FOR 24 VAC TO GAS VALVE DURING TRIAL FOR IGNITION.
Condition:
• All wires are reconnected.
• On/Off switch is on.
• Call for heat is activated.
• Perform test at end of ignitor warm up period.
Touch meter probes to wiring terminals on gas valve with wires from control board still connected
during the ignitor warm up period.
IF...
24 VAC is not present to gas valve
24 VAC is present
24 VAC is present
Technical Training Department
STC-077
S U F S E R V I C E
T R O U B L E S H O O T I N G

GAS VALVE TEST

AND
gas does not flow to burner
gas does flow to burner
30
H A N D B O O K
SUF 240 ONLY
THEN
replace control board if Step 9A and 9B have
been performed and results were successful.
check for/restore supply gas;
check for/clear any restriction in the gas train;
replace the gas valve if the valve will not open
with 24 VAC applied.
continue to Step 13.
State Water Heaters
Ashland City, Tennessee © 2004