Lost Heat and everything,?

Need some help and advice.

07 T600 Cat C-15,
1,313,134

2 nights ago my heater and blower stopped working. When I say stopped I mean everything, no blower air in front or back, nothing. Turned truck off, did post trip and then cranked truck back up and everything worked fine.

Last 2 nights left truck running because of the cold. Yesterday morning it was running fine. This morning not working.

Came to Shop and cut truck off, went and signed in after 10 minutes came out and tried it started working for 10 minutes and then stopped again.

Went and got another control module and plugged it in and still nothing?

I have noticed when it is doing this the AC button you press to activate the bunk is flashing on and off?

 

Thank you. Come to find out the fuse in the fuse box had worked its way loose.

Wow never thought about a fuse causing the ac light to flicker on and off.