I have a weird issue with my oven. Whenever it reaches the target thermostat number (400 degrees or whatever) , it makes a loud boom sound. Not terribly loud....but not quiet either. Its usually at the moment when the gas turns off. (when the thermostat reaches the desired amount) This sound only happens the first time the over reaches the thermostat amount....all other instances of it going above and below the thermostat number , it doesnt make that sound. Only the initial time. The oven uses propane by the way.
Any ideas ?