What does it mean when lights are flashing on my heater and air conditioner

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Started van it started up,i started to drive & it stalled & wouldnt start back up then my battery needed charged so i had it charged full charge on battery,i tried to start it & it wouldent start, it turns over it just wont start,i noticed my cam censor needed replaced,i am about to go put it in now,when i turned the key i seen that the lights were blinking on dash where my heater& air conditioner temperature control is,