Do I have a fuse for heat my heat want get even warm air conditioning works fine
No fuse just for heat, probably the thermostat..
Or valve in hose for heater core supply. I don't know how it's set up on this car, just tossing a guess, but do agree with Rowefast, not a fuse issue. It's either vacuum operated or mechanical cable
Looking for a Used Passat in your area?
CarGurus has 25,669 nationwide Passat listings starting at $1,000.
Search Volkswagen Passat Questions
Volkswagen Passat Experts
Related Models For Sale
Used Cars For Sale