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Description
87F16 Furnace Primary Limit Switch up to 140°F - For Lennox Furnaces - Replaces 87F16 87F1601 L140-30F 36T01B387F16 Furnace Primary Limit Switch up to 140F Key Features Primary high limit safety control for forced air furnaces Activates at a fixed temperature of 140F (60C) to prevent overheating Automatically resets at 110F (43C) Switch configuration: SPST (Single Pole, Single Throw), normally open contacts Probe insertion length: 3 inches Replaces Cross Reference Part Numbers 87F16 87F1601 L140 30F L140F 40 36T01B3 42155 A1247 Compatibility & Fitment
87F16 Furnace Primary Limit Switch up to 140°F
Key Features
- Primary high-limit safety control for forced-air furnaces
- Activates at a fixed temperature of 140°F (60°C) to prevent overheating
- Automatically resets at 110°F (43°C)
- Switch configuration: SPST (Single Pole, Single Throw), normally open contacts
- Probe insertion length: 3 inches
Replaces / Cross-Reference Part Numbers
- 87F16
- 87F1601
- L140-30F
- L140F-40
- 36T01B3
- 42155
- A1247
Compatibility & Fitment
- Designed as a direct replacement for specific Lennox brand furnaces.
- Verify fitment by confirming the part number on your original switch or in your equipment's service manual.
When to Replace
- Furnace blower runs continuously after the heating cycle has stopped.
- Heating system short-cycles or shuts down prematurely.
- Furnace fails to produce heat or ignite the burners.
- Control board displays a fault code indicating an open limit switch.
Installation Tips
- Disconnect all electrical power to the furnace before servicing.
- Locate the limit switch, typically mounted on the furnace plenum near the heat exchanger.
- Note wire connections before removing the old switch.
- Install the new switch, secure it with the mounting screws, and reconnect the wires to the terminals.
- Restore power and test the furnace through a complete heating cycle to ensure proper operation.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.4 ★★★★★
Based on 10 reviews
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Product Reviews
★★★★★ 5
Cute and soft dog toy!
Color: Gray, Size: 8 IN
This very cute armadillo dog toy is nice and soft for our Golden Retriever to carry around in his mouth. He eventually likes to pull off the legs, ears, or anything else extending from the body of the toy and so far he hasn’t been able to do so with this one. Not saying that it’s not possible, so as with any toy, you should monitor your dog playing with it as we definitely have to. He also likes to continually make his toys squeak and this toy’s squeaker works very well!
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Reviewed in the United States on June 4, 2026
★★★★★ 5
Great Toy for tiny to giant pups
Color: Gray, Size: 8 IN
Cute Amarillo. My teacup Yorkie uses it as a pillow or chases and attacks it. Well stretched does not easily fall apart. Good value for the money. Suitable for all sized dogs.
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Reviewed in the United States on June 3, 2026
★★★★★ 4
Fun dog toy, but not for heavy chewers
Color: Pink, Size: 14 IN
The armadillo is cute. My pittie, Sasha, was very excited to see it. She just had TPLO surgery on her left knee (she tore her ACL just before the 4th of July), and I wanted to get her something she could play with while she convalesces, that isn't a ball—she really likes to run and jump and chase the ball, but with her knee out of commission, I didn't want her to get depressed being trapped in her crate while she heals—with this toy, she was able to keep playing and not over excert herself and get more hurt. It quickly became her favorite toy; she chews it relentlessly and gets made when I take it from her (see below).
It makes a funky squeak that's not a high-pitched squeak, like I thought it would be; it's more a low-pitched, lowing sound like a baby calf. One thing I would like to point out to other purchasers about what the description says:
"Durable and Long Lasting - Made from premium soft materials, our cute plush dog toys can withstand rough play for indoor or outdoor and last for years to come. The textured surface also helps massage and soothe your dog's gums during playtime"
This is a little misleading. It's a good texture and Sasha loved to play with it, but it wasn't very durable. It might be when compared to other chew toys, but not for my baby. She tore the nose off within 20 minutes of getting it. The next morning, she ripped off an ear, and I had to pull the stuffing out of the face so she wouldn't eat it while chewing away. She doesn't seem to mind, but I sure wish it had held up a little more.
All-in-all, this was a good toy for a few days.
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Reviewed in the United States on July 29, 2025
★★★★★ 5
Cute durable dog toy that my puppy loves
Color: Blue, Size: 8 IN
This small light weight dog toy is very durable, super cute, and my dog loves it. My dog tears everything up but he hasn't made a dent in this; very durable and chew resistant. He seems to really like that it makes a lower squeak noise. I threw this in my cart at the last minute before checkout and I am pleasantly surprised with the quality. I would say this toy is worth the price; suitable for small to medium sized dog.
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Reviewed in the United States on June 2, 2026
★★★★★ 5
Nice toy for a bigger dog
Color: Gray, Size: 6 IN
My little rescue chihuahua has exactly one toy he can make squeak. This one is cute and he did try, but no luck. I have two large baskets of toys I've bought in the 3 years I've had him. He is only able to make one squeak. He loves it to death because he loves the squeak. It's a hedgehog that I will try to find on Amazon and replace. Poor little dog just has a very small mouth.
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Reviewed in the United States on June 3, 2026