Why is my electric going on only in half my house?
Your question lacks details we need to accurately answer your question (see my comments above).  However, it sounds like you are losing one leg of your service.  In the US (are you in the US or Canada?) electricity is delivered in 110 volt increments (commonly referred to as &quot;legs&quot;).  Each house has two of these &quot;legs&quot; delivered to it.  Again, each &quot;leg&quot; carries 110 volts.  When you need more power (e.g. for clothes dryers, water heaters, AC, etc.) these two legs are combined to provide 220 volts.  Everything else in your home will get electricity from one leg or the other.  If one of these legs fails (e.g. by a connection being broken due to a bad transformer or a damaged pole) then you will lose electricity in &quot;half&quot; of your home.
The heat pump probably runs on 220 volts and requires both legs to run properly.  You are probably hearing it strain to start on just one leg.  This is dangerous to both you and the heat pump.  You will either burn out the motor or start a fire (maybe both).