I have had the air conditioning system on non stop lately. Recently, I started hearing a sound coming from the passenger footwell and then the A/C would stop blowing. I would turn the A/C off for 10 minutes and then back on. The fan would blow for a while but then would start to stutter and eventually die. I can repeat this indefinitely. Seems to be heat related to me (something getting hot then cooling off, only to overheat again). Could this be a relay? Or maybe the blower?