Hello Specialed -
If you have the diesel fired heater booster and it is running it is less (but not impossible) likely that you are having fuel gelling problems. Although there are separate fuel lines and even fuel pumps, I believe, if you had gelling that was keeping the engine from running it seems likely that the gelling would also be keeping the heater from running as well.
- Is the extra noise that you are hearing steady (ie it happens whether or not you are trying to start the vehicle - it is always going as a steady low level roar) or is that extra noise only happening when you are trying to start the engine or at least only when you have the key turned to the accessories position?
- Do you have both the wavy line icon switch on the bank of switches down by the shifter and up in the A/C on off visually round control area?
- Do you feel hot air blowing out of the small exhaust pipe in the left front wheel well (see
http://www.sprinter-source.com/forum/showpost.php?p=2352&postcount=28 for pictures of the switches and the heater exhaust)?
- When, if ever, was your fuel filter last replaced?
I have never had to use kerosene even under extremely (well below zero) cold temperatures. I have heard folks recommend using kerosene and I have heard folks recommend against using it.
If you send me a PM I will send you a telephone # you can reach me at and we can try talking some of this thru on the phone.
Zach