I appreciate your efforts. Let me know how the 195* thermostat works as the ambient temps come up.Dieselfab - Oddly enough we're not forecast to get below 20f over the next few weeks. After that it's spring. I don't know what more data I will be able to provide. I hope what I've been able to give you helps you guys come up with a solution. If all else fails, I'll be here next winter if you need more data logged.