I dont think so when the thermostat kicks the furnace on the burners all light up and the blower goes but wont stay on. I do not own any meters is there any other way to know if that could be my problem?

Hello, I just recently switched my furnace to heat and when I switched the heat will come on for approximately 2-3 minutes and turns back off. I have tried cleaning the thermocoupler and the pilot. Also tried a new thermostat but to still no luck. Any ideas on what could be causing this? It worked f...