climate control on causes climate control led to flash on and off ?

This sounds like you have a communication network issue.

You have what is called a CAN bus network that will act like a highway where all the modules use to talk to the other modules.

Here is a guide that will help with this:

https://www.2carpros.com/articles/can-scan-controller-area-network-easy

So, at this point what we need to do is start with a scan tool that can communicate with each module and find out if they are able to operate properly on this network.

Here is a guide that will help with this:

https://www.youtube.com/watch?v=InIlnsjOVFA

below you will find the wiring diagram of this network that will help but we need to perform this function and find out what happens so that we can take next steps.

Thanks

Turned out to be a loose (and by loose, I mean less than one-half turn) ground on the upper left side of the dashboard which can be accessed by taking off a side panel. Lots of grounding wires here and must have been just loose enough for oxidation to take over. Not a problem at all since tightening the screw.

The dreaded loose ground strikes again.

Thanks so much for updating us on this. Please come back to 2CarPros in the future.