If it's below freezing where you are (based on your signature?) it may be water intrusion/freezing around the motor/mechanism. If you don't really need it, I'd wait until it warms up above freeze, and then continue your troubleshooting.
Mike. Comments are anecdotal or personal opinions, and worth what you paid for them.
2018 (2017 Sprinter Cab Chassis) Navion24V + 2016 Wrangler JKU (sold @ ????)
2016 Sunstar 26HE, V10, 3V, 6 Speed (sold @ 4600 miles)
2002 Roadtrek C190P (sold @ 315,000kms)