Hot air blowing on my feet

My 2000 slt Jimmy my problem is when the A/C is off and the control is in the off position with the fan setting at 1 the lowest setting and the windows open, very hot air blows in on my feet. After driving for a while wearing sandles sometimes i have to use the cruise control because the heat is so hot it just about burns you. I can't firgure it out, I might just Duct tape the vent closed its dringin me nuts. My car temp runs around 205 to 210. Any suggestions. I am sweeting to death up hear in NYC.

Thanks
-Mike

I have the exact same problem with my 2000 Sonoma----it's annoying as hell.
Someone said that it is likely a water coolant flow valve of some type that allows hot water to flow through the heater core. It must be stuck open.
I just would like to find out where that valve exisits so I can check it out.
My heat in the winter is not that hot and my A/C in the summer works OK until the car heats up---so it sounds like a likely solution--I just need to find out where that valve is.....

My 2000 slt Jimmy my problem is when the A/C is off and the control is in the off position with the fan setting at 1 the lowest setting and the windows open, very hot air blows in on my feet. After driving for a while wearing sandles sometimes i have to use the cruise control because the heat is so hot it just about burns you. I can't firgure it out, I might just Duct tape the vent closed its dringin me nuts. My car temp runs around 205 to 210. Any suggestions. I am sweeting to death up hear in NYC.

Thanks
-Mike


I was experiencing the exact same problem
I found that a connector had come off my blend vent directly behind the glove box--the connector is black with a blue, black and brown wire--this regulates your hot and cold setting---once I reconnected ,hot air was gone and air and heat worked again....
Hope this helps
Chief40

I have the same problem. I have a rag jammed in the vent.
Hey surfbp, did Chief40's fix work for you? how do you find this connector?

I have the same problem. I have a rag jammed in the vent.
Hey surfbp, did Chief40's fix work for you? how do you find this connector?

jsayre---My friend told me to look for a vacuum hose that was either disconnected or with a hole between the temp controls and the vac controlled dampers behind the glove box. Once I realized the control that wasn't working was electrical and not pneumatic I just started checking connecters and wires.
Access to behind glove box is easy--upper left corner of open glove box is a spring loaded release--depressing that latch lowers the glove box to access the area where the dampers are. If you need any more info--email me and I'll see if I can take a picture of where the connector is located.

I'm having that same problem, I checked the hoses both behind the glove box as well as on the back side of the controls, and still have hot air coming out. Any other suggestions?

Check the "vacum ball" hanging on the underside of the hood. There should be a vacum line running into it, if not connect it. My nipple was broken off so I just jammed a golf tee into the hose and now my vent controls work.

I had the same issue when the AC coolant drops to low that is the default mode, added more refrigerant problem corrected