1991 405 MI 16 ac push button not working, help

[Betis]

I had the ac on today, when I tried to push the button off it would not shut down. The light was on. After a few tries, and shutting down the engine, It finally shut off. But now when I push the button it just does not turn on. No yellow light. Any help would be appreciated.
Thanks in advance

[xantia_v6]

It could just be that the internal mechanism in the switch has jammed.

[wurlycorner]

Not familar with 405 heater control panels. Does it look like this?



Does the switch push and click in, or is it just a push and bounce back button? If the latter, it's probably a microswitch or possible a PCB contact pad type switch.
PCB contact pad type switches suffer from wear, or just general dirt build up over the years. Taking them apart and cleaning with acetone/IPA should sort.
For a microswitch, would probably be best to replace it.

Either way, looks like you need to get the heater panel out and take it apart to see what's going on inside.

[Betis]

No, but now fan does not turn off

[wurlycorner]

No it doesn't look like that?

I think you need to answer the second question (what type of switch operation it is) and post a pic of the panel, so we can narrow down possible cause further... Failing which, follow my suggestion and just take it apart yourself anyway, to see what you can find.