I have a brand new propane range. I first started using it around Christmas time and all was well. Suddenly about a week ago all the burner flames are orange. I have (2) 500 ga LPG tanks tied together. I looked at the tanks and one is at 15% and the other was still at 75%, odd. I had the supplier look the system over and they said everything was fine that the second tank would eventually draw down. I asked about the flame issue and he comes up with the humidity in the house is too high because we're running a humidifier. What? I have been monitoring the RH in the house on 3 different devices for weeks, new hardwood floors so I want to know if there are humidity issues (too high/low). The humidity has been between 30% and 40% for weeks so that's not it. Nice try. Well 2 days ago I closed the low tank to make sure the gas would feed out of the full tank. I don't want an issue a 3 am on a Saturday. Everything runs fine. Well today I lit the stove for the first time and what do you know, the flame is perfect, nice and blue. For kicks I switched the tanks, close one opened the other. I let the furnace cycle to clear the line to the house then lit the stove. The orange flame is back. The LP guy said he checked the regulators and they were the same. Could this be a bad gas situation? I had propane in the past but this is a new house to us so I'm back on LP for the first time in 12 years or so. I have never heard of this kind of problem. Also could the problem cause any damage to my appliance? I'm looking for opinions or suggestions.