Last night a strangle smell came through the vents in my home. In almost 11 years in this home and I have never had this happen. I was a bit nervous because my daughter thought it smelled like rotten eggs. I felt like it was burning electrical. I turned the furnaces off and headed out the door to call the gas company. The tech came out and determined that I didn't have a gas leak, however he smelled something odd, too. He thought the furnace might be misfiring. He helped me by turning off the gas to the furnaces until I could have an HVAC tech out. I called my HVAC company this morning. They were great, sent a tech out a few hours later. The tech didn't find anything for quite some time. Before leaving, he discovered the control board of my upstairs furnace had black marks on it. He had removed it, brought it down, then proceeded to tell me that he was going to turn off the furnace until I had time to get a quote from their company tomorrow on a new furnace vs a new control board. Great! No worries with the upstairs unit being off -we just would not go upstairs. I finally went up this evening before bed to make certain all of our lights were off. And I found the heat running, thermostat set at 76. The temperature was 76, too. I went through my paperwork that the tech left. It clearly says that he was turning off the furnace. I tried to read up on what the control panel does - and it looks like it regulates gas. I tried to call the HVAC company to make sure that we are fine and that this wouldn't have caused any issues. I got an answering service. The lady said she would send the message to someone. I called back when I didn't hear back 40 minutes later, to be told they will call after 8am, they never return messages at night. I am just hoping someone is awake. reading this, and knows if I should be concerned, or should it be fine? Not sure why the tech made it quite clear that the furnace had to be off if it was fine to leave it running? I am a bit afraid to go to sleep, not knowing if there could be a huge problem with the furnace running all afternoon and evening with either no control board or a burned out control board? I am mainly worried about the fact that it is supposed to be regulating the gas. I can't find much information on the internet that helps. I did turn the furnace off as soon as I realized it was still running. Any help as to whether or not we should be safe in the house for the night would be truly appreciated. I don't know anything about furnaces and am honestly a bit concerned. Thanks!

[left]I have a Gibson propane furnace. When it lights it will burn app 30 seconds then shut off. I removed the flame sensor and cleaned it, this had no effect on problem. However I discovered that if I leave the burner ft. Cover off it works as it should, if I put the cover back on it reverts to the same problem. Any help greatly appreciated. Thanks in advance[/left]