Trouble starting, mostly in cold weather

Now it cranks everytime I try to start it, but won't turn over.

Neither. It won't code, even before I changed the sensor.

Reset the comp by unhooking the battery for a bit. Then it started with no problems for about a day & 1/2. Once today it gave me trouble. Turn the key & it got power, but no crank & no turnover. Waited 10-15 min & tried again. Started right up. Kept staring every other time today no problem. Did have a service engine soon the one time it gave me trouble. When the code computer is plugged in it comes up no code avail & fuel pump seems to be working fine. No issues when actually running, just when starting intermittenly. Sometimes turns over & dies immediately, others a click, others nothing(still has power to everything). Always diff & random response.

Solid. Bout a new key cuz mine was worn. Has started every time since my last post. Don't know if it's fixed now or not, but it has moved on to my blower motor working at random.

No. The only time I hook up a computer is at advance auto. Will it get worse if I just wait til it gives me trouble again or should I replace the blower motor? Winter's here, can't afford to deal with it just failing. Can I get a code when blower is inoperable without a light or anything?