fan limit switch

[sesmith]

. But my snap disc fan limit switch has failed

Any ideas where I can find a sensor online?
Any suggestions guys? I"m thinking about overnighting one of these things if I can't find it locally

Here's a good selection. Take your pick:

HVACR - Grainger Industrial Supply

 

[mtfallsmikey]

Used to be able to get adjustable ones too...

 

[Phil_Marino]

Gah. I'm gonna need a host for the image. The raw pic I took apparently is too large to add as attachment for this..

I'll go ahead and post all the numbers on the switch starting from top to bottom as they are line by line

610046
T-O-D60T12
0805
F120-10F

Here ya go, hopefully this works

What you have is a fan switch - NOT a limit switch. A fan switch turns on ( the switch closes) as the temperature rises. In a limit switch, the switch turns off ( opens) when the temperature rises. Limit switches are designed to power down a furnace is something has gone wrong. A limit switch would run your fan only when the furnace was cold.

The label on yours " F120 - 10 " means that it's a fan switch (that's what the "F" is) that closes when the temperature rises to 120 (F) and opens when the temperature drops 10 degrees from that ( or, 110 F).

You can get a replacement at Grainger's for about $8.

Phil