Probably a Progressive Dynamics PD4060K. Should be an equipment list that came with your unit that shows the equipment with model and S/N.
Don't have the book in front of me, so don't know off hand who makes the tank heating pads.
The Schwintek can be overridden either with 12V or by pulling the motors and pushing the slide in. The Schwintek brochure that came with your unit should help with that. The motors are behind the rubber seal at the top of the sides of the slide.
The living room slide can be overridden by crawling under the rig with a 3/4" socket. Release the motor brake and crank away.
2015 Greyhawk 29MV
Honda CRV toad with Blue Ox baseplate
Ready Brute Elite towbar with braking system
TST 507 Flowthru TPMS