Mechanic Q: my heater has started blowing hot, then cold air. doesn't?

my heater has started blowing hot, then cold air. doesn't stay hot, now I'm overheating. what is causing this?

Mechanic Q: how do you test the ignition coils to see which one is bad??

how do you test the ignition coils to see which one is bad?

Mechanic Q: bought new battery 1 week ago, car is dead in mornings,?

bought new battery 1 week ago, car is dead in mornings, absolutley no power, also fuel pump went out & cant get it to a garage. Are there places who will come get car and not charge a ton to do it if they fix it?