Furnace kicked on and ran when I arrived so I performed a three point safety inspection on the furnace. Furnace passed the safety inspection today. I made the system restart and when I restarted the system, I found that the gas valve is working intermittently. I I showed customer pictures and readings I received during the safety inspections. We also talked to options for repair and replacement. Customer would like to take some time to think about which direction they would like to go. I gave them my card in case they have any questions or would like to have us back out. Furnace is working intermittently at departure.