If you have a very serious problem with your work superiors, would it affect your mood with the customer?

Of course it will but i should know that i'm working for the good service and i should handle the customer well at that time.
in the leisure or free time i should talk with the superior and should get the solution, otherwise it may hamper in next work.

Never let the customers see your bad mood.
You should try to deal any problem you have with your superiors in private.
Your mood can affect others, your coworkers and as well customers.
I agree that the satisfied employee leads to a satisfied customer and overall growth of the company, but still any issues should be deal without affecting anyone else.
:)

maybe yes ! but i try to keep customer away from my personal problems !

If we talk individuals feeling it surely affects, BUT for a Professional person like me, when it comes to work, when i do my works/task and duties i make sure i would deliver a very good outcome...simple- personal matters separates from jobs cause if not, it would ruin your day and clients/customers will get affected.

it will surely affect my mood as a whole ..
but I will try not to let it affect how I deal with the customers ..

The ideal is to separate your personal emotions from your job.
Ethically it is the best practice for every professionals to be descent, caring to every, client or customer to deal with.

never show to the customer your annoyance or bad mood.
never reveal any internal problems to the customers, and never let your customer hear a bad word about your company or management.

Certainly affect but must think that the customer is not a sin to deliver a service you less satisfied because of the head of your business

I say should not because your supervisor behavior towards you not hurt bad as bad as any loss of sale.
If you didn't attend the customer in proper mood its translate as bad service and in turn make a bad rapo with customer which result into loss of sale and that surely hurt ask any front line sales person.

sure it does..! Satisfied Employees equal to satisfied Customers when measuring customer satisfaction.
Hence, its very important for any business to measure the employee satisfaction and correct any gap before measuring customer satisfaction...