Hero image 0 of Supco Thermostat,160 to 180,2-51/64in.D,SPST SHL525, 0 of 2

Supco Thermostat,160 to 180,2-51/64in.D,SPST SHL525

(No ratings yet)

Key item features

Gas Limit Furnace Thermostat | SHL525 | Replaces Lennox 47-21711-11 | OEM-Compatible Ensure safe and efficient furnace operation with this brand-new SHL525 gas limit thermostat. Designed to replace Lennox® part number 47-21711-11, this high-limit switch helps protect your heating system by interrupting burner operation when internal temperatures exceed safe thresholds. Built to OEM specifications, it offers reliable thermal protection and long-lasting performance in residential and light commercial gas furnaces. ⚙️ Features & Benefits:
✅ OEM-compatible replacement for Lennox high-limit thermostat
Opens at designated temperature to prevent overheating
Durable construction with secure mounting tabs
Brand New – Unused and ready to install
Compact design for easy replacement and universal fit Replaces Part Numbers: 47-21711-11 ✅ Fits Models: Compatible with select Lennox gas furnace models. Please refer to your unit’s service manual or model tag to confirm compatibility. ️ Installation Tips:
Disconnect power and shut off gas supply before servicing
Locate the existing limit thermostat on the furnace heat exchanger or plenum
Remove mounting screws and disconnect wire terminals
Install new thermostat in the same orientation and reconnect wires securely
✅ Restore power and gas, then test furnace operation and safety cutoff

Specs

Thermostat type
Manual Thermostat
Control type
Automatic
Display
No Display
Brand
Supco
Color
Multi
Has nrtl listing certification
N

Current price is $26.39

Price when purchased online

Free shipping
Free 30-day returns

Walmart Protection Plan by Allstate

(Only one option can be selected at a time)

2-Year Plan - $2.00

3-Year Plan - $4.00

Smart Device Setup

Smart Thermostat Installation - $88.00

How do you want your item?

Ships to

Arrives by Thu, May 14

Sold and shipped by Seneca River Trading, Inc.Pro Seller

4.530075187969925 stars out of 5, based on 2926 seller reviews(4.5)

Report an issue with this seller

Free 30-day returns

About this item

Product details

Plenum Thermostat, Product Type Plenum Thermostat, Application Limit Control, Contact Form SPST, Switch Action Open on Rise, Switch Opening Temperature 180 Degrees F, Switch Closing Temperature 160 Degrees F, Maximum Control Temperature 180 Degrees F, Minimum Control Temperature 160 Degrees F, Insertion Length 7 in, Input Voltage 120V AC, 240V AC, Overall Depth 2 3/4 in, Overall Height 2 3/4 in, Overall Width 1 7/8 in, Series SHL, Reset Type Automatic Reset, Resistive Amps @ 120V AC 15 A

Gas Limit Furnace Thermostat | SHL525 | Replaces Lennox 47-21711-11 | OEM-Compatible Ensure safe and efficient furnace operation with this brand-new SHL525 gas limit thermostat. Designed to replace Lennox® part number 47-21711-11, this high-limit switch helps protect your heating system by interrupting burner operation when internal temperatures exceed safe thresholds. Built to OEM specifications, it offers reliable thermal protection and long-lasting performance in residential and light commercial gas furnaces. ⚙️ Features & Benefits:
✅ OEM-compatible replacement for Lennox high-limit thermostat
Opens at designated temperature to prevent overheating
Durable construction with secure mounting tabs
Brand New – Unused and ready to install
Compact design for easy replacement and universal fit Replaces Part Numbers: 47-21711-11 ✅ Fits Models: Compatible with select Lennox gas furnace models. Please refer to your unit’s service manual or model tag to confirm compatibility. ️ Installation Tips:
Disconnect power and shut off gas supply before servicing
Locate the existing limit thermostat on the furnace heat exchanger or plenum
Remove mounting screws and disconnect wire terminals
Install new thermostat in the same orientation and reconnect wires securely
✅ Restore power and gas, then test furnace operation and safety cutoff

info:

We aim to show you accurate product information. Manufacturers, suppliers and others provide what you see here, and we have not verified it.

Specifications

Thermostat type

Manual Thermostat

Control type

Automatic

Display

No Display

Brand

Supco

Warranty

Warranty information

Please be aware that the warranty terms on items offered for sale by third party Marketplace sellers may differ from those displayed in this section (if any). To confirm warranty terms on an item offered for sale by a third party Marketplace seller, please use the 'Contact seller' feature on the third party Marketplace seller's information page and request the item's warranty terms prior to purchase.