Bryant Limit Control Switch

[AQTGirly4U]

We have a Bryant furnace that says model number is 5190XX042000MACA. We bought our house a few months ago and, of course, have no manual for the furnace.

The problem is that our blower will not shut off. The heat works great but the blower won't shut off, even though the t-stat is set to "Auto." I've read a few of the posts and it looks like we need to take a look the "limit control switch." However, we have NO idea where to look for this. Can anyone tell us where we can locate this on the unit?

Also, if we are able to locate this on the unit and feel this is the problem, any ideas as to where we could purchase a new part?

Much thanks.
Ona and Pete

[HayZee518]

the fan limit is physically located on the hot air plenum at the top of the furnace, right where the galvanized plenum begins. - looks like a little silver box cover. remove the cover and you'll see a dial with two arrows and a slot. You move the pointers around this slot to give you a minimum heat level to start and a maximum to stop. Inside all it is is a bi-metal coil that rotates when heated and contracts when cool and opens and closes a set of contacts at full voltage of the blower motor. For parts any burner supply company should be able to help you.