Hi, great forum, have searched the above topic but haven't found one that fits. My problem first manifested itself with not getting hot air out of the vents during the most recent cold spell. Checked the forums and found that low coolant can cause this. Filled the empty reservoir with coolant and the heat worked. Now, notice small amounts of coolant on the garage floor (some of the spots look orange? and put in green coolant) but reservoir is empty again and heat inside car not working again. So, I've got a coolant leak but not sure where it is and how to fix it. Oil changes at Jiffy Lube have been fine, no coolant in oil noticed by mechanics. No coolant smell coming out of exhaust pipe. Car runs well, no overheating, even when the coolant reservoir has been empty. Thanks for any advice!