The gas control valve is the most safety-critical part on a gas water heater — it meters gas to the burner, holds the pilot, and shuts everything down if the flame goes out. When it fails, you get a pilot that won't stay lit, a burner that won't fire, water that never gets hot, or in the worst case, the smell of gas. This is licensed-gas-work territory, full stop.
We diagnose gas valves methodically: thermocouple and thermopile output, gas pressure at the valve, and valve body integrity. If the valve is the fault, we replace it with the exact OEM-spec part, leak-test every connection with proper detection fluid, and verify safe burner operation before we leave.
Active leak, no hot water, or gas smell — don't wait. Call Emergency Line
Safety first: gas supply verified off; area checked with a combustible-gas detector.
Diagnose: thermocouple, gas pressure, and valve function tested to confirm the valve is the fault.
Replace & test: OEM-spec valve installed, every joint leak-tested, burner tuned and verified.
Storm-season note: if floodwater reaches your gas water heater's controls, do not try to relight it. Water-damaged gas valves must be replaced, not dried out — call us and we'll make it safe.
| Service | Typical Range |
|---|---|
| Gas valve diagnosis / service call | $89–$149 |
| Gas control valve replacement | $300–$600 |
| Thermocouple replacement (if separate fault) | $150–$300 |
Ranges are representative market estimates for the DeSoto area and can vary by unit size, access, and parts. Final pricing is confirmed on-site before any work begins. Owner to verify.
Leave the house immediately — don't flip switches or relight anything. Call your gas utility's emergency line from outside, then call us once the area is declared safe.
Gas valve replacement should be done by licensed professionals with proper leak-testing equipment. Improper work risks gas leaks and carbon monoxide.
A weak thermocouple is the most common cause and a cheaper fix than a valve. We test it first — many 'bad valves' are actually bad thermocouples.
Typically 8–12 years. Floodwater reaching the valve, however, means immediate replacement — wet gas controls are never reused.
We also serve Cedar Hill, TX, Duncanville, TX, Lancaster, TX, Glenn Heights, TX, Red Oak, TX, Ovilla, TX and all surrounding areas. Back to the DeSoto water heater leak repair homepage.
Pilot won't stay lit or gas valve leaking in DeSoto, TX? Licensed gas control valve replacement. One call gets you a real dispatcher and upfront pricing.
Call (833) 713-2101