Dometic Heat Pump will not stay in cool mode

In further discussion, the solenoid would let the reversing valve revert to heat after 3-4 minutes, but there was still 110 volts at the board where the solenoid connects. So we will try a reversing valve solenoid, have it coming. Thought seriously about pulling one out of one of the others, but temps in the mid 90's today and no shade, so did not seem like a good thing to do. Did the diagnosis and testing before 10:30 so it was not to bad. The gent that Ivylog steered me to was very knowledgeable and was thinking that the board would still be good, we also did a a reset of the wall thermostat. Thanks for the help and suggestions and will let you know how it comes out when the part arrives. Thanks again for the responses, Happy Trails Bert