Possible causes include an overloaded circuit, a short in the wiring, or a failing compressor. Reset the breaker, but if the problem continues, consult an electrician or HVAC professional.

Install a new breaker, run correct-gauge wire, and connect to an approved junction box. Consult an electrician if unsure.

Not recommended—skim coat or sand walls smooth first, or use thick paneling to mask imperfections.