1988 XJ40 with some A/C problems...

I've had the classic A/C panel failure now three times in six months. Each time, I've found a used A/C panel and replaced the one in the car. Each time, it would work for a few weeks, then not work for a couple of days, then work again for a couple of days and then die altogether.

My question is simple: What besides a failure of the fan rheostat could cause the A/C panel to black out? Is there a relay somewhere that could cause the panel to lose power, or am I just eating A/C panels right and left?

Jess

 

I don't know if the dealers can still get these repair parts but I just buy micro switches and some #2-56 screws/nuts and fix my own. You have plenty of units to repair and sell some on the internet!!!!!

Here is the old TSB for reference

bob gauff

 

Thanks!

Now the car has a problem it hasn't had before. Previously, I had just swapped out a new panel and it fixed the problem. This time, no dice -- and I had a Jag shop do the work. But apparently, they failed to plug something in as they were putting the car back together. I no longer have a radio, dome lights, dash illumination when the headlights are on, tail lights, tag lights, running lights, etc. Either I've lost a significant power buss somewhere or they forgot to plug something in.

Jess