sometimes my heater blower loses all power if i let it set for a while it starts

What is your question?

it started when my automatic lights started to goof up i heard a click under the dash and my lights went off and so did the blower motor i can turn on the lights manualy but i cannot do anything with the blower now i turn on the lights manually at night but the heater will work sometimes for a hour sometimes longer then it loses power any advice