I have an 2003 Odyssey and when you turn on the rear heat it wont come through the vents. The blower motor is blowing and operable and the motor will vary speed when you adjust it. If you switch it to cold it will start blowing cold air through the vents. It is only on hot that it wont blow air. Is there a diaphram back there that isn't swithing to allow hot air to blow by?

Does anyone have a schematic of that whole HVAC system back there so that I can know where to look. I know where is unit is but before I tear the whole back of the van apart I want to know what to look for so that I can fix it and put it right back together in preferably an afternoon. My wife uses this van everyday to run the kids around and with winter setting in we need heat in the back.

Thank you,

Colby

 

Rear heat comes out of vents at floor level at the front of the passenger side wheel well and in the cargo area on the passenger side only. Only A/C comes out of the vents in the ceiling.

 

the odyssey has rear heater blower, maybe this link can help http://www.mechanixtrix.com/Article/...?ArticleId=205

 

 

I have a 2002 Honda Odyssey in the backseat over your head there is two switches what is on and off and the other one is too hot to cold the problem I'm having when you turn it on it won't come on from overhead but it will come on and blow out cold air when you turn on from the frontthe hot and cold control switch move freely like its not connected the on and off will not work. From overhead when you turn it on from the front only the cold air come out you can put the real on heat and they remain the same the switching the rear does not work only in the front with cold air only would you have any knowledge of what could be the problem and why.when you turn it on from the front don't nothing come out from overhead but when you turn it on from the front and turn it off to your left it blows out cold air when you try to turn the hot to cold switch if you will freely and stage coming out cold no heat can you help me please