Question Clicking noise

[Vision923]

Newbie to the site. I thank you all in advance for your help and consideration. We are currently experiencing a problem with our 98 fleetwood vision. The black box (HVAC, under the refrigerator next to the breaker panel and fuses) clicks every 5 seconds and a small red light blinks with every click. The lights throughout dim when it clicks also. Our front slider will not go out all of a sudden either. Help!

 

[Kevin D Pem]

Don't know what the box is. But I wonder if what you hear is a thermal switch.
A few things would make a thermal switch cycle, all lead to the same issue, overload!

It's summer, the heat will compound an overloaded disconnect.

A failing battery will cause the converter to work overtime.

A large load item/circuit that normally would not cause an overload may bring it over the top.
Any combination of the above can trigger such events! I would start by verifying the battery is not the problem, then I would remove the fuses and replace in different order till the event reoccur.