Blower not shutting off

[larryf333]

I have a Coleman Gas Furnace 7900 series. I have started having problems with the blower motor not shutting off. The thermostat can be set to 70 and the house will be at 74, yet it will not shut off, even when I turn the thermostat to off. I have to remove the doors and tap on the Lower limit switch and Fan Control Switch, then the unit will shut off. I'm guessing the problem is with one of these two switches, but I'm not sure which one. Is there a way to test them with a multimeter to find out? The thermostat is almost new and all the wires are nice and tight with no shorts. Could one of these switches be causing it, or is there something else that is more likely the problem?

I am very strapped for cash right now due to medical bills and slow work, so I need to try and fix this myself if possible.

Any help would be appreciated,
Thanks,
Larry

[coolwhip]

Looky here.

http://www.youtube.com/watch?v=-oFOX3syIqU

[beenthere]

All of us understand the tighting of money in these times.

Unfortunately, site rules prohibit DIY instructions.

Please read them, Thank you.

http://hvac-talk.com/vbb/showthread.php?threadid=1241

For everyones protection, this thread is closed.