97 nissan maxima switch doesnt work on 1,2,3 but work on number 4 only. what is wrong and how can i fix the problem. how can i r&r the climate control panel. thank your

Problem is usually the resistor, but switch may be going bad too. The resistor is next to the blower motor, above the passenger's feet. You may have to take the glove box out to get to it. See picture below. Also, please see my tip at http://www.fixya.com/cars/r6234839-doesn_t_heater_or_air_conditioner_blow for additional diagnostic info. Please get back to me if you have any questions.

REMOVAL & INSTALLATION, Climate Control Panel

1. Remove the center console trim fascia.
2. Remove the radio to allow access to reach behind the control panel.
3. Remove the control panel attaching screws.
4. Remove the center console bracket, if necessary, to allow for easier removal.
5. Separate the control panel from the trim panel.
6. Unplug the harness connectors and vacuum lines from the control panel.

To install:

1. Plug in the harness connectors and vacuum lines from the control panel.
2. Install the control panel into the trim panel.
3. Install the center console bracket, if removed.
4. Install the control panel attaching screws. Do not overtighten them, as they are screwed into plastic.
5. Install the radio.
6. Install the center console trim fascia.
7. Operate the climate controls and check for proper operation.