Does this come with an enclosure to cover the connections?

no it does not I built a cover out of a old fan case

Would this work on a bathroom exhaust fan?

Yes, I am using this controller on a bathroom exhaust fan and it works very well. It does have a minimum fan speed though so you can only slow it down so much. But that is pretty slow.

My blower has a variable speed control knob. How do I attach the wires?

It will no effect anything you attach to it this nothing but an on off switch

I assume this mounts inside the stove, right? My old one is in a hole where the sensor was sticking out.

This is not a thermal coupling as would be found in a oven. This has a magnet on it, that the large circular area. I used it as a sensor on a pipe and used a metal tie rap. The part with the electrical connectors is the electrical thermo disc switch. Only its lower metal surface should be directly exposed to the heat. Such as the other body of a oven or hot water heater or in my case a small boiler pipe. The non-metallic body of the thermo disc is not intended or may not be designed to hold up to the direct heat.

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Magnetic Thermostat Switch

Product ID: 10181700

Details

Brand
Hongso
Circuit Type
1-way
Connector Type
Clamp
Contact Type
Normally Open
Item dimensions L x W x H
2.5 x 1 x 3.23
Material
Metal

📏Compact 2.5 x 1.75 inches size

🧲Powerful magnetic mount, no screws needed

🌡️Auto switch-on at 120°F, off at 90°F

$45

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Description

🔥 Stay cozy, stay smart — magnetic thermostat magic! 🧲

COMPACT DISCREET - Small footprint fits seamlessly on any stove or fireplace blower kit without clutter.
TRUSTED PERFORMANCE - Highly rated with 4.6 stars from 839 users—join the savvy homeowners upgrading their comfort.
EFFORTLESS INSTALLATION - Strong magnet design means zero tools or hardware—snap it on and go!
RELIABLE THERMAL SAFETY - Shuts off at 90°F to prevent overheating and ensure safe operation.
SMART TEMPERATURE CONTROL - Automatically activates your fireplace blower at 120°F for optimal heat circulation.

The Hongso Magnetic Thermostat Switch is a compact, metal thermostat designed for fireplace stove fans and blower kits. It features a strong magnet for tool-free installation and automatically activates the blower at around 120°F, shutting off at 90°F to optimize heat distribution and safety. With a 4.6-star rating from hundreds of users, it’s a reliable upgrade for efficient, hands-free fireplace airflow control.

Specifications

ASIN	B00Q9X1GGY
Actuator Type	Automatic
Best Sellers Rank	#860,150 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #861 in Fireplace Replacement Parts
Brand Name	Hongso
Circuit Type	1-way
Color	black
Compatible Devices	Fireplace Blower, Fireplace Fan
Connector Type	Clamp
Contact Material	Metal
Contact Type	Normally Open
Control Method	Voice
Control Type	Automatic
Controller Type	Automatic Shutoff
Customer Reviews	4.6 4.6 out of 5 stars (839)
Item Dimensions	2.5 x 1 x 3.23 inches
Item Weight	1.12 ounces
Lower Temperature Rating	90 °F
Manufacturer	Hongso
Material Type	Metal
Model	1
Mounting Type	Fireplace / Stove Mount
Number of Items	1
Operation Mode	automatic
Part Number	1
Switch Type	Thermostat Switch
Terminal	Screw
UPC	701142416574
Unit Count	1 Count
Upper Temperature Rating	100 °F

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$45