Dash 8-200
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 200; Flight Crew Total 5000
Aircraft Equipment Problem Critical; Inflight Event / Encounter Weather / Turbulence
Flight Crew Landed As Precaution; Flight Crew Returned To Departure Airport
Aircraft
After deicing and departure during climb out; the right elevator horn heat caution light illuminated and the master caution light. Continued climb through acceleration height and conducted the climb check list. Then right elevator horn heat caution light checklist. Then the First Officer noticed that the right side deice press was at zero PSI. Given the combination of faults detected I decided to return to field. We asked ATC to return to field. We executed a cruise check and a before landing check list and noticed that the aux fuel pump lights were not illuminated however they checked when tested. I notified the Flight Attendant of the issue and that we will be returning and to prep the cabin for an immediate landing and instructed her to inform the passengers of the return to field. Also the Number 2 STBY HYD pump press was at 0psi but System Hydraulic Pressure was normal. We continued on to the approach and landed without incident. No emergency was declared.
DHC8-200 Captain reports a right elevator horn heat caution light illuminated as well as the master caution light just after takeoff.  It was then noticed that the right side deice press was indicating 0 psi along with the Number 2 STBY HYD pump. The Captain elects to return to the departure airport.