If you’re not a car person, it might be difficult to know exactly when something is wrong with your vehicle. Your mechanic says you should take it in when it starts making noises, but which of the many noises your car makes are the bad ones? Furthermore, not all the problems with your car will necessarily be big. When it comes to your car’s HVAC system, signs of trouble can be subtle. RPM Automotive in Kelowna can help clarify things a little with this list of five signs that your car’s AC and heating system needs repair: