The multi-function valve works in conjunction with a thermocouple to monitor the catalytic reaction in the Cata-Dyne™ heater to ensure it is well established before the fuel supply remains on unattended. It is also designed to shut off the gas supply to the heater automatically if the thermocouple senses that the catalyst has dropped below the activation temperature. This unit functions as a non-electric combination of a safety shut-off valve and a thermostat control.