01 Highlander

What is your question?

My 2001 Highlander has 2 issues. If I start the engine with the heater on it squeals like a belt issue. Soon as I turn heater off it quits. Sound like a belt? I have an sound similar to an exhaust leak, more like a loud hum. Irritating if sitting in the back seat. A quick check does not appear to be exhaust. Noticed it quiets when turning wheel to the right. Could this be CV? Anyone with a similar problem that's been corrected that could shed some light. $ are tight, trying to avoid unnecessary service call.