I have 2007 Toyota Sienna .. Coolant getting exhausted and driver and passenger side not getting heat .. second and third row are getting proper heat?
Pressure test the cooling system and/or use a UV dye to detect leaks. Use a test kit like the one Scotty has demonstrated to check for head gasket leaks.
https://www.youtube.com/watch?v=rDuGeQnMOzk
https://www.youtube.com/watch?v=W8kra65m15c
https://www.youtube.com/watch?v=v0U8Iyf0kk4
Well if you are losing coolant the heating system will never work right cuz it will have air in it you have to find out why it's losing coolant if there's a leak somewhere if this blockage somewhere you have to fix that first cuz if they're if you are losing coolant air will get in the system and make it go wacky
Please comment on not heating at front and do I start ? Do you think it could be thermostat or Do I need to do these Radiator pressure testor
Thermostat gauge fluctuations
Heater control valve
Heater core clogged
Heater hose 2
Heater flush kit with garden hose
Start simple. You said you loose coolant. As Scotty said, you should find out where the coolant goes, does it drip on the ground or it burns?
It is not dripping .. probably it burns .. I do not see any smoke
It is not dripping .. probably it burns .. I do not see any smoke