I have a central Air and heat system. The I turned the heat on and the blower came on for a few seconds then shut off. It came on again for a few seconds and shut off and is not turning on at all. I am guessing it is the fan limit switch. It's a Honeywell switch. How can I troubleshoot this problem?
Thanks
Brian

Place each probe of a multimeter on each limit terminal, and set for voltage. Should read
Zero volts while motor running. If limit switch opens up, you will see voltage.