If as you stated the drain is working properly, then the pressure which may have to be relocated, or the rubber hose to an alternate location/port, most newer systems can be installed in may different positions and the plumbing/drain kit has to be configured properly for the type of installation, sometimes in colder climates moving the pressure switch and hose above the hose port prevents condensation from building up in the switch.
Answers & Comments
If as you stated the drain is working properly, then the pressure which may have to be relocated, or the rubber hose to an alternate location/port, most newer systems can be installed in may different positions and the plumbing/drain kit has to be configured properly for the type of installation, sometimes in colder climates moving the pressure switch and hose above the hose port prevents condensation from building up in the switch.