sounds like you forgot or missed the double pole section of the breaker box,these are the breakers that have 2 breaker handles that are together,they will have a number on them like 30,40,50,60, amp breaker thats what powers they stove and the a/c so look again,and flip them off and back on to make sure they are engaged,after you do that turn the thermostat to the on position from auto just to see if your getting power to the air handler,then you’ll know your on the right track,good luck

Sometimes, its difficult to see if curcuit brekers are fully on. there is a “tripped” position that is actually not on, but doesnt look like its off if you just take a quick look. I suggest that you turn off all the brekers and then turn them back on again just to make sure.

there is a possibility that one of the legs are out and you are only getting 110 volts.

Flipping the breaker shouldn’t hurt anything, I’d try doing it again perhaps you didn’t get it reset all the way back over, sometimes they can be tough to reset.