I tried opening it all the way and closing it, several times. It still is not wooshing but there is a slight smell. So I've not used it and am using a small ceramic heater. It got down to 53 2 nights ago. At least the electric blanket worked well. Last night it was 63, better. 2 more nights to go.
I have made many calls and found a gas place and an RV place that would take a look at it. Hope to take it in next week when I get home. I am not going beyond what I did. I asked all I called about replacing the tank and none would.