The truck heats up fine, Then stays about an 1/8th the way up on the guage. The only time it will move up from there is if i'm in a drive through for a long long time. it will creep up a tiny bit then go back when i leave.

ok i will check the hoses today. and see if i can feel a temp difference. also i will check the vents for them just not working or w/e.

the heater water valve is that what turns the heat on or off (open or shuts the valve)?

thanks for the replies

cars:
88' montero SWB (turbo 2.6l project)
03' S2000w/hardtop (daily ride)
91' crx dx (my never ending project)