hybrid90

My dad is complaining that the inside of his Accord gets warm for no apparent reason even with the heat turned off. The heat seems to be coming from the dash driver side.

AC works normally and car doesn't overheat or anything. What's the cause of this?

I don't drive his car so have no idea.. I'm just going by what he's telling me.

Lost Again

It would help if we knew what year the car was?

Each gen covered in this section (90-93, 94-97, 98-02) have their own issues/possible answers.

Fliptard

even with the controls off, and the setting on hot. Air is flowing thru the outside vent, thru the heater core and then out to the cabin. Either turn the switch to use the cabin air or turn the controls to cold

hybrid90

Sorry, Accord is a 97. The switch is turned to cold and he still feels unusually warm inside the cabin... it's out of the norm he said.

Maybe a stuck switch.. I'll try to check it out this weekend.

Could a busted O2 sensor cause the car to be hotter than usual? His car is throwing an O2 code also.

Lost Again

Even though the 97 had the updated heater control cable - try removing the cable from the valve and closing the valve all the way. See if that helps with the "warm air", of course there is still the blend door cable.

So if step one does not work - be sure to feel the temp of the hoses on both sides of the heater valve.

You can then pop the blend door cable off the blend door - under dash, pass side - and close it all the way and see if that helps.

Last, seems strange, be sure the temp **** isn't broken - the shaft will split and not allow it to turn the shaft all the way.

hybrid90

Thanks! I'll try to look into all your suggestions this weekend when the damn weather cools down. It's too freakin hot to be in the car right now.

MAD_MIKE

Is there a difference between the '97 and 94-96 cars?
I know the heater water valve on my '95 will not fully close with the cable, have done the adjustment and it still does not close. Only manually closing the valve will close the valve. I just figured the valve was worn/gunked up. I can feel a 'step' when closing the valve fully.

Lost Again

In 96 Honda upgraded the heater control cable - they added a "stop" to the outside and retro'd the part number.

Meaning if you get a new cable from the dealer and compare it the original cable from a 94-95 it will have this added stop. Same length and all of that - just added the stop so that it doesn't slide around in those "clamp over" things that hold the cable.

Might not make sense unless you have played/done the blend door adjustment on a 94-95 before. Messing with both of those cables - the one from the **** to the "door" and then the one from the "door" to the heater control valve.