no heat on 2005 Chevrolet Monte Carlo

eveything works as far as blower and switching from heat to defrost but just has no heat.Just flushed radiator,and there is no engine light on...any ideas??

Asked by for the 2005 Chevrolet Monte Carlo
I would check the thermostat, the blender door, heater core and the coolant level one of these things could be causing no heat.
thank you for the response,I went out and started playing with switches and seems that the sliders for hot to cold were sticking..long story short i now have hot and cold when switched...thank you again for the very quick response....
I have done all these things, installed new thermostat.
i'm having the same problem. Do you remember what you did to get the sliders to stop sticking ?
4 answers 3 comments
check for a heat control valve that opens up the flow on the heater hose to the heater core.this is located on the in side to the heater core feel both hoses to see if 1 side is hotter then the other with heat on high
CAN YOU FLUSH AND REFILL A 2000 BUICK LESABRE WITHOUT FLUSHING THE HEATER CORE
bad hot water valve