[MBZ] OT heat pump aux heat

[Kaleb Striplin via Mercedes]

It is in the 20's today and will be into the single digits this week.  
One thing I have noticed for quite a while is every now and then the 
breaker for the aux heat will be tripped.  I usually just reset it and 
its fine but the aux heat does not have to run much as it has not been 
that cold.  When we got back I had it set for 65 and the breaker was 
tripped again.  I set the temp back to 68 and checked later and the 
breaker was tripped again.  I reset it and just now checked it and temp 
is now up to 68 and the breaker tripped a 3rd time.  In other words, I 
need to get this addressed.  What could be the cause?  Thought about 
swapping out the breaker in case it was getting weak but what else could 
be the cause?  Is it likely something is shorting in the heat strips 
itself?  Not sure if I should investigate and resolve or just turn in a 
service request to the home warranty company.

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