Immanuel

I have an old airco natural gas furnace with two burners that keeps cutting out in the middle of the night. So far, I have replaced the limit switch, thermostat, cleaned the pilot light, and checked the air filters which are clean. Someone told me it might be the thermocouple, but I'm not totally sure. I think that this furnace is the original one that came with the house back in 58 or 59 and was made in Vancouver, BC. When it doesn't come back on again, I can usually get it to work again by turning off the thermostat, then the power to the furnace, and then turn the furnace back on and the thermostat up and it will usually restart again. Go figure. Also, the pilot light is a standing one. If you have any bright ideas, please enlighten me, thank you for reading my post, Immanuel.