ARCTIC P14 PWM PST Value Pack 140 mm - F-Series ACFAN00081A

Q: What are the dimensions, mounting hole to mounting hole? Also, how thick is it?

Five inches exactly. About 7/8 inch thick.

Q: How does the temperature sensor work on the f14tc? it seems the fan keeps spinning no matter what the temperature at the sensor is. help plz!!

Contact http://cs.arctic.ac/ for technical assistance.

Q: anyone having trouble with the 140mm TC fan not spinning at room temps?

It's a PWM fan, it's only going to kick on when the temperature of the board or the CPU (BIOS dependent) achieves a temperature to send power to the fan so it spins up. Depending on your fan profile curve, it won't kick. If you think the fan isn't working at all, go into the BIOS and put the fan at full speed. If this doesn't kick the fan on, then you need to send the fan back and get a new one.