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Your cart is empty.The Emerson 3f12-220 1/2-inch disc limit control is designed for safety in gas-fired furnaces, unit heaters, rooftop units and HVAC systems. This open-on-rise rollout safety switch features a manual reset (cut-in) and 220 degree cut-out temperature.
Coach Steve
2025-08-22 15:35:48
I was unable to find the correct part in the timeframe I needed, so this is a great, inexpensive, temporary replacement for Lennox 102907-01. It has a 10 degree F higher cutoff, so don't use it as a long-term replacement for the Lennox part. I'm happy to have a working furnace in the meantime.
The Vman
2025-07-19 11:07:49
Used this after a furnace repair, actually added it as a third safety on an older furnace after it got wet from AC coil overflow, the cooling coil drain was blocked up...Ruined everything...Wanted to be sure of protection and this does the job...Excellent product, excellent service.
Jonathan K
2025-06-24 15:05:04
Fixed an old Tempstar 80 gas furnace that was blowing cold. This was a direct replacement. Been working for a month now.
Scott Bodenberg
2025-05-18 10:48:25
Worked well. Saved my dad $400 by replacing this for him in his toe kick heater.
Chi
2025-05-09 13:01:10
Pretty much same as other thermal sensors. No issues.
TNT Martial Arts
2025-04-13 20:38:45
36TX16611865L220FA2229appears to be compatible with the 99K63
MASON
2025-03-16 17:50:02
The one that was attached to my water heater would not release the wire and broke so I ordered this part and now I have my water heater up and running.
Bessy74
2025-03-15 12:26:44
Works great. Goid quality product.
R Frank
2025-03-09 14:18:24
Replaced the sensor in the Maxx 50 garage heater. good price too so got an extra one .
patric
2025-03-05 10:38:39
perfect for high limit stove part
Keely
2025-03-01 12:16:46
I bought this to replace a 190F switch that constantly tripped (since new) in a sub-floor heater. Since the floor is concrete, the extra 30F is not a concern and finally we have a heater that works consistently.
Tak Naydamo
2025-02-19 13:47:35
Installed the switch and as soon as the furnace turned on, the limit switch tripped and won't reset. Tried a few times to reset and no go.Took a multimeter to it and now shows open loop.Don't buy. Cheap quality.
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