When heater comes on and then goes off pilot goes out to?

When the heater turns on and then off, the pilot light may go out due to a few potential issues. One common reason is a draft or airflow that disrupts the flame, causing it to extinguish. Another possibility is a malfunctioning thermocouple, which is designed to detect the pilot light's heat and shut off the gas supply if it goes out. It's important to address these issues promptly for safety and proper heater function.