We have had -30 temps in the Midwest the last few days. My 2019 expedition hasn't started since Sunday as a result. I replaced the battery because it tested out as dead. I installed and all the electrical comes up, but I do the push button start the engine doesn't turn over, just makes a clicking sound. I can't even push the brake pedal down. On the dash the engine light and battery lights are lit and I get an error saying 'check brake system.' I'm waiting for roadside to tow it to a dealership but any ideas?
That really sucks, of course, but I would just wait until everything thaws out, recharge the battery and try it again. That's all the dealer is going to do, and charge you for the towing and labor.
Actually, your money would be better spent on a jump start pack like this,
https://no.co/gb40 You'd be able to crank your motor in a matter of seconds without needing help from another vehicle for a jump.
A clicking sound on try to start is the symptom of a low 12V battery. Don't worry about the brake pedal being hard, you only have to barely move it to actuate the switch allowing start. When you press the brake pedal, look for the green LED in the start button. That tells you the brake pedal is depressed enough.