The heat and seat warmers stoped working in my car... also the car wont start unles i use the remote start...can someone tell me what causes this it all happend at the same time?

first check fuses inside car,look for location in owners manual....if all fuses are good, then you need to find fuse/relay location under hood....next most likely item that affects different systems is a bad electrical ground.....if the fuses dont fix it, go to a mechanic.