That doesn't sound right to me, but I'm no expert.  If your house is divided 
into zones, maybe the inside unit senses too much difference in temperature 
between zones, and just runs for a bit to equalize the zones?
Max Dillon
Charleston SC
'87 300TD
'95 E300

On July 13, 2015 12:23:14 PM EDT, "Kaleb C. Striplin via Mercedes" 
<> wrote:
>Did some googling but have not found anything on my exact issue. On my
>heat pump / ac system last night I notice it would run, shut off and
>sometimes kick back on less than a minute later. And sometimes would
>kick on and blow for about 30 seconds then kick off again. I am not
>sure what the outside unit was doing. So today I am working in my
>office and the programmable thermostat is set to raise the temp to
>something like 78 during the day. The inside temp is currently about 74
>but about 3 times at seemingly random the inside unit will kick on and
>blow for about 30 seconds the turn off. The outside unit does not turn
>on when this happens. It should not be turning in since the set temp is
>higher than the actual temp. Is this some sort of issue with the
>thermostat, or the system? Or is this some sort of normal deal? Maybe
>it turns on to clear out moisture on the inside unit or something? Heck
>I don't know never seen such a thing before.


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