Question about 1990 Nissan 300ZX

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1993 nissan 300zx

My 300z only blows air on the floor and the top of the das at the same time but it wount change the settings to the front bents it blow most of the cold air to the floor.

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  • syndel04 Apr 22, 2009

    Hello Have a problem with a 90 300 ZX not heating just cold air . onlyblows out the wents and no were else the fan blows but doesent changeto defrost or get any warm air at all anywere ,, and do yo u have anyidea wer e i could find a repair manual ?



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It's a problem with the switching of the vent doors in the climate ducting inside the dash. It may be the door actuators themselves, but it could also be your climate control panel. I've seen this happen before, and more often it was the venting doors, but it could be the panel still (I've seen failures of those as well). What you can do is, if you know someone else with a Z, borrow their climate panel (it's easy to remove - two screws on the bottom of the pod, a little finagling with the hazard switch, and then unplugging the harnesses in the back), install it in your car, and try it out - if you are able to control the heat ducts at will with their panel, then yours has failed. If their panel functions just like yours, then you have problems inside the dash with the vent door actuators.

One side note - if you do manage to borrow a climate pod, it must be from a 91-96 Z, as the 90 model had a panel that functioned differently and is not compatible with your 93.

Posted on Oct 03, 2008

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Hello Have a problem with a 90 300 ZX not heating just cold air . only blows out the wents and no were else the fan blows but doesent change to defrost or get any warm air at all anywere ,, and do yo u have any idea wer e i could find a repair manual ?

Posted on Nov 15, 2008


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