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94 Maxima with Auto Climate Control - Blower worked on high only, then quit working - Printable Version

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94 Maxima with Auto Climate Control - Blower worked on high only, then quit working - mentalsteve - 10-31-2011 05:46 PM

My blower on my 1994 Nissan Maxima with automatic climate control quit working. It has only worked on high for a long time but now it doesn't work at all. Any suggestions? What parts do I need to check out? Thank you for your time!


RE: 94 Maxima with Auto Climate Control - Blower worked on high only, then quit working - Rupe - 10-31-2011 10:28 PM

I was once the "go to guy" at the local Nissan dealer but that was over 20 years ago and my memory is failing. That said, what I would do is find the blower itself (behind the glove box) and see if it's getting power at all. My best guess is it's not that the "climate control" itself has gone out but wither the blower motor (rare) or the powering circuit.

If there's no power at all I would look at the blower switch and the blower resistor. Most likely the resistor was the first part of the problem (hi blow only) and eventually the dash switch failed too.

Let us know what you find and we can chat more.


RE: 94 Maxima with Auto Climate Control - Blower worked on high only, then quit working - mentalsteve - 10-31-2011 10:34 PM

Well the problem here is that the Automatic Climate Control doesn't have the standard type resistor, it uses a different speed control. I'll check for power at the blower. I'm wondering what all is in the circuit between the Control Unit and the blower.


RE: 94 Maxima with Auto Climate Control - Blower worked on high only, then quit working - Rupe - 10-31-2011 10:41 PM

It's called a power amplifier. It's usually located right near the blower and has a bunch of cooling fins on it.
(at least that's where it was in the late 80's)

It's job is to control the blower speeds back when they had a completely variable system, not the "four clicks for four speeds" system.