my 1985 jeep cherokee heater wont work,only blows cold air. how to fix?

[Colton23899]

my heater only blows cold air...my temp guage on my dash only goes to about 1/4 the way up and imthinking it ahould go to half way. maybe my thermostat? help please!!!?

 

[letsget_dangerous]

yep replace the thermostat