Heater not moving heat

You'll need a multi tester , you can't see electricity , if you're going to do your own repairs there are tools you will need .

if you're sitting in a parking lot somewhere and trying to use the heater, you wont get much action because when you step on the accelerator and the vehicle is moving, the coolant starts moving again and the coolant is coming from block and is good and warm ( also based on where the temperature setting is). But no, when you sit and idle, you wont get much pressure on you at all, in fact the heat will fade after a few minutes because the comfort of that heat has been used.