Beech 1900 Captain reported the smell of electrical smoke during the flight. After landing the smell returned and the Captain turned the aircraft over to maintenance.

Narrative

While on cruise flight it got cold; I decided to turn on the vent blower and up the heat of the aircraft. I started smelling what at first seemed like it was just the smell of the aircraft's insides and didn't think much of it. I then noticed the smell starting to get stronger and turned off the vent blower. No smoke was seen in the cockpit. Once vent blower was turned off the smell subsided and I continued with the flight normally. Upon landing at ZZZ and waiting to be marshaled into parking the smell returned; this time stronger and with a distinct smell of burned rubber/wires. Immediately upon noticing the smell was not normal I turned off all of the electrical equipment (master switch off); parked the aircraft and advised the mechanic who was waiting for me at the parking area of the incident. He walked into the aircraft and also noticed the smell.In cruise upon turning vent blower on and smell getting stronger; at the time I did not notice the distinct rubber smell and thought it was just the aircraft dirty smell.Electrical problemUpon realizing the smell was coming from wires I turned off the master switch.