The pilot light on a gas range will not stay lit what is probable cause?

If the pilot light on a gas range won't stay lit, the most probable cause is a malfunctioning thermocouple, which detects the pilot flame and keeps the gas valve open. Other potential issues could include a dirty or clogged pilot orifice, inadequate gas supply, or drafts that extinguish the flame. Additionally, if the pilot light flame is too small or weak, it may not be able to heat the thermocouple sufficiently. Regular maintenance and cleaning can help prevent these issues.