As the title says, there is constant heat coming from the vents regardless of whether the recirc is pressed or not. Anyone have any idea what the problem could be?

 

slide the lever to the blue

 

wow are u serious lol? if its in the red heat will come out the driver and passanger side regardless. even if set to off.

 

Please be more specific. Is there always heat regardless of where the temperature control slider is set? Is there always air (hot or cold) coming through the vents even when the Recirculation button is pressed?

Always heat, regardless of temp control slider means one or both of the control cables has come loose. There is one from the temp control slider down to the bottom of the heater box, and another from the heater box to the valve on the firewall near the heater hoses. The first cable controls dampers in the heater box to either allow air to flow through the heater core (heating the air), or to block off the heater core and direct air around it. The other cable controls how much engine coolant is flowing through the heater core.

You will always feel air coming through the vents while driving if it is set to fresh air intake, even if the fan is off. You should NOT feel any air if you press the Recirc button. If you do still feel air, then the damper above the blower motor probably isn't moving to shut off the fresh air intake. To check, remove the plastic cowl trim at the base of the windshield. You will see a large hole and can look down inside the blower motor box. This is the fresh air intake hole. Have someone turn the car on and press the Recirc button, and check to see that the damper moves all the way up to shut off the fresh air intake.

 

ha ha, i agree with cable coming loose, but it would be funny if he has the heater on.

 

There is constant heat regardless of whether recirculate is pressed or not. Also, there is constant heat regardless of where the temp slider is. The heat gets more intense when the slider is on hot and less intense when on cold, but it is still pretty hot. I will check to see if all the control cables are connected. Thanks for your help.

 

My 2000 GSR does this as well. Its the cable that controls coolant flow through the heater, as mentioned by PatrickGSR94, for me at least. If you have the temp control set all the way to cold, the return line from the heater core should not warm up. If it does, then you're not blocking coolant flow correctly any more.

Eh, its December. Slight heat always on isn't much of a deal. I'll fix mine come spring when it matters.

 

As I discovered this past weekend when replacing my heater core, the position of the cable in the cable clamp can affect how far the cable can move the dampers and the coolant valve. It's possible that the valve isn't closing all the way because of where the cable is clamped to the bottom of the heater box.

 

are you always high revving ?