Too bad this thread took the route the Somalian pirates only take, the high and mighty like to see their opinion in print for no other reason but to be a loud mouth "god save the queen" bully ... <period>. This altruist crap runs like diarrhea. Have fun on your vacation and when you get back go ask for advice on a real help forum and not one where they rub nuts.
Turn your thermostat up 10 or 20 degrees from where it is. If the pilot lights and stays on and the main burners light, even for a minute, the furnace is working, but it doesn't have any call for heat. If this doesn't work is your thermostat powered from the furnace wiring or does it have a 'AA' battery inside it ? Basically on a call for heat your stat only gives your furnace a closure like a light switch so you can try crossing the stat "heat" leads to see if the furnace responds with heat.