S U F S E R V I C E H A N D B O O K
T R O U B L E S H O O T I N G
GAS VALVE TEST
STEP 12
24 VAC TO GAS VALVE
SUF 240 ONLY
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… | AND | THEN | |
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24 | VAC is not present to gas valve |
| replace control board if Step 9A and 9B have |
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| been performed and results were successful. |
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24 | VAC is present | gas does not flow to burner | check for/restore supply gas; |
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| check for/clear any restriction in the gas train; |
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| replace the gas valve if the valve will not open |
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| with 24 VAC applied. |
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24 | VAC is present | gas does flow to burner | continue to Step 13. |
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Technical Training Department | 30 | State Water Heaters |
Ashland City, Tennessee © 2004 |
