Newer goodman furnace will not start on call for heat... well 1 out of 15 times it will. The little fan turns on , the HSI glows , gas valve clicks after HSI goes out. This is LP. Can Anyone help?

Is there gas,, could it be turned off

NO the gas is not turned off

There is a safety pressure switch located close to the gas valve to shut it off in case of low gas pressure, this switch is only installed on propane furnaces. Check you gas pressure with a manometer, the proper pressure will be on the data tag on the furnace. Good luck, Mike