Working on a Honda Civic 2009 LX, Good ac and blower works well but there is no heat, the temperature know seems to be not working at all. I haven't purchased a repair manual yet and wasn't sure if it has a cable. Any suggestions.

 

This is a bump. I have checked water in the radiator, a little dirty needs changing but it doesn't look like mud.

 

Could be a few things...

Check the thermostat.
Could be air in the cooling system.

just a few things to check but also if the coolant is a little dirt that isn't a good thing either...

 

turn the ignition to 0

hold the recirc and rear defrogger button and turn the ignition to 1

the recirc light turns on for 2 seconds then the self diagnose begins