[Jupiter209]

My daughter's Camry just recently stopped blowing hot air when heat is on. The temp gauge is about halfway, which should, blow hot air. Any tests I could do to diagnose the problem? Thermostat, heat blend door, heat control valve?

 

[skykruserwingman]

You say her car is a v6. Is it a 3.5L? Are the heater controls manual or the electronic climate control type? Person I know has a 2007 Camry XLE with a 3.5 and climate control system. Practically no heat on passenger side and tolerable on driver side. All servos are functioning. Engine temperature good, heater core was flushed, and cabin air filter replaced.
Back to your daughter's car. the coolant is up? The rad cap holds the recommended pressure? All heater controls are functioning?

 

[XLE2011]

Are you leaking coolant? check your coolant level and top it off if it is low. One of my friends did not realize her coolant was low and topping it off fixed the issue with the heat.

 

[Donald E George]

If your 07 is like my 04, you can access the heater core inlet/outlet tubing adjacent and above the throttle pedal. If both tubes are warm/hot to touch, you have a problem with the heater controls.