Cessna Aircraft Undifferentiated or Other Model
Flight Crew Multiengine
Situational Awareness
Conflict NMAC; Deviation / Discrepancy - Procedural Clearance
Air Traffic Control Issued New Clearance; Flight Crew Took Evasive Action
Human Factors
We had just fully configured for landing; crossed the FAF and began our final descent on the RNAV RWY 17R approach into DWH. I was the pilot flying and had a customer pilot in the right seat for a demo flight. Tower called out traffic at our 1 o'clock and 2 miles unknown altitude that was apparently on final then began to turn north 'possibly NORDO'. We called visual and were instructed to continue the approach. Both of us in the cockpit saw Aircraft Y turning what looked to be base to final converging on our path. I broke off the final approach course to the left keeping Aircraft Y in sight and let tower know. Aircraft Y appeared to notice us as it made an abrupt climbing right turn away from us. Once I felt we had enough separation I elected to resume the approach; notified tower; received landing clearance and landed uneventfully. If I had to guess; we came within about 200-300 ft. of Aircraft Y. There is a lot of student traffic and flight schools at DWH. Aircraft Y was most likely a student training flight. Tower was transmitting in the blind to Aircraft Y repeatedly and told them not to circle on final and to look for light gun signals.Exercise heightened awareness when flying to/from airports where there is a lot of student training.
Pilot reported NMAC with another aircraft on approach.