Heater not putting out any heat, using lots of coolant. No sign of coolant on floorboard?Just replaced radiator and thermostat due to overheating
Wednesday, December 26th, 2012 AT 3:43 PM
The first thing you need to do is pressure test the system to find the leak and repair it. It's entirely possible that you overheated it too much before and it now has a blow head gasket.
Wednesday, December 26th, 2012 AT 3:55 PM
It may sound silly, but I did the same thing. After flushing out the system and replacing the radiator, I had no heat. I reversed the hoses on the heater core. They are the same size, but one lets hot water in, and the other. You get the picture. After switching the hoses, I regained heat.
Sunday, February 3rd, 2013 AT 3:19 AM
Reversed heater hoses will not cause coolant loss nor overheating. Heater hoses wouldn't need to be removed to change a radiator anyway.