Heater and AC intermitent on 1998 BMW 323i

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My 323i convertable heater and AC intermitentily works. The panel lights on the controls go out then come on with no other symptoms relating to it. Please help.
(2) Answers
(3) Comments
Billbo, Do you figure the intermittent heater/ac out? We have the same problem with the same car.
Haven't figured it out yet. I hope some one has seen this and figured it out. Please help people.
this can be fixed by replacing a resistor on the circuit board in the a/c control panel box or by getting one that has been rebuilt by someone in this way, this is a problem on my 1998 M3 also. it is a simple panel to get in or out by first pushing out the trip computer from below/behind, then pushing this panel out from below/behind and unhooking the two wire bundle connectors. trade it in at a used BMW parts place or open it yourself and try to re solder a new resistor from radio shack in the circuit board per internet available instructions.
You say pushing out the trip computer from below and behind and pushing out thea/c control panel from below and behind.

My question is below and behind what on each of these and how do I identify these computer panels. Sorry about my ignorance but please help.

Thanks, BILL