Just bought a 05 base rsx and the heater is blowing cold! When I checked it had low coolant. Topped it off. Car is reading a temp of after setting 204 degrees and average 188-190 degrees while driving. Upper radiator hose feels nice and warm but hoses leading to the heater core dont! I know its reaching operating temp and no signs of leaks inside nor smell of antifreeze! What else should I look for? Car is like driving a refrigerator!

 

bump!

 

have you found the issue yet?

Is the coolant still low whenever you check with the engine cold?

Have you tried to bleed the air in the coolant system? Set temp to hot, don't need air on, run engine idle with radiator cap off. Let radiator fan come on 3 times or so and top off coolant whenever that happens. This will ensure coolant has circulated everywhere, including your heater core and associated hoses. Fill coolant reservoir as well.