actuator could be defaulted, causing the blend doors not open from heat to cold.
just checking why heat in front don't work and heat in back dose 2003 Mazda mpv
heat works in back not in front front blows hot for a few mins then cold
You rear heat will only work if your front heat is on heat and feet. If it is on vent at the front of the van it will not heat the rear of the van. Not sure why but that is how ford designed it.
usally there is a valve. Should be in the collant line that goes to the back heater. So when you turn on the heat it opens the valve to let the collant into the back heater and then closes when you shut off the rear heat. follow the heater lines from the back and see if there is a valve hope this helps !!!!!!!!!!!!!!
The control for the heat on the dash has a control for the back seat and also has a setting that says something like "Rear Control". This allows the passengers in the back seat to control their heat independently via a temperature control in the back seat (on the back of the center console). So you could have the heat on in the front and the rear on "rear control" and if the passenger in the back has set their control to cold, it wold blow cold air in the back even though you have the heat on in the front.
does the front work? if the front DOES work, it may just be the hose to the back has a leak/hole.
The heat is transfered from the front vents and does not work when the defrost mode is on. www.trailvoy.com
if you heat in back but not front is usually caused by front heatercore stopped up. you can try to back flush heatercore. also make sure to get air out of system using bleeder screws.
There is a heater blend door actuator on the drivers side foot well, near the gas pedal. They tend to go bad and it doesn't open the door to let the heat go to the front. Looks like this. Costs about $40-$50.
Because the rear heat and front hear are 2 different systems. If for example the front heater coil has broken the rear one may still be functioning. Front heater core could be plugged up. Try flushing it out.
To reflect heat back into the room.
It is warmer because the fire gives off heat. Your body is not a good conductor so the heat can't travel though your body.