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Lennox G40UH-48B-090X Gas Valve
The Lennox G40UH-48B-090X gas valve governs all of the gas as it comes into the heating unit. This gas valve is controlled by the main control board attached to your air handler, is it so equipped.
Major signs the main gas valve is dead
- You smell gas
- System refuses to start
- The valve looks damaged
- Furnace will not light
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