No, the pilot light will not stay lit if the thermocouple is bad. The thermocouple is an essential safety device connected directly to the gas valve; its sole purpose is to detect the pilot flame and generate a tiny millivolt electrical current that keeps the internal safety magnetic valve open. If the thermocouple fails, it stops producing electricity, causing the safety valve to snap shut instantly and extinguish the pilot flame. Verification: Release the control button after lighting; if the flame immediately goes out, the thermocouple is failing.
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