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Diagnose gas valve issues step by step. Check voltage, pressure, and symptoms to determine if the valve needs replacement.
Before replacing a gas valve ($150-$400), verify it's actually the problem. Most "bad gas valve" diagnoses are actually control board failures, wiring issues, or pressure switch problems. This tool walks you through the diagnostic steps.
1) No voltage at valve — it's not the valve, it's the board or safety circuit. 2) Valve clicks but no gas — could be the valve OR a blocked vent/pressure switch. 3) Weak flame — usually gas pressure or orifice issue, not the valve. Check our error code guides for your brand.
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