The coolant leak is pretty cut and dry - you have a leak somewhere. The lukewarm heat (assuming you're referring to the car's heater) could be for a number of reasons. Insufficient coolant could be one of those. Your coolant could be burnt out. It could be a problem with one of your heater hoses. You could have a worn out heater core.
You don't buy lukewarm water, you heat water until its lukewarm.
Overheating is a very concerning issue. Many have overheated during normal, every day, outside, activities. These people who have overheated can suffer a heat stroke. The heat stroke can and most likely will cause a person to die.
Yes, low coolant can cause a loss of heat in the cabin.
No, you don't know where the coolant went to. Have it pressure tested.
Yes. The coolant carries the engine heat to the heater core. Without coolant the heater core does not get warm.
a bad water pump could cause low heat. The heater uses the coolant from the pump to generate heat.
The most common cause is low coolant.
your heat comes from your heater core which draws heat from your engine coolant so if you have no heat and the blower is still running then there is a coolant level problem as in none which then would cause the mottor to over heat and quick
If the coolant reservoir can not maintain the proper level of coolant, it is possible the engine could over heat when the level drops.
it will allow coolant to leak ut. once the coolant gets low then the vehicle can over heat
Yes, If to much leaks out this will cause the engine to over heat, smoke and or stall hence the name engine COOLant :)
Perhaps about 75 or 80 degrees Lukewarm is generally around body heat. ≈ 36 oC or 98 oF