Skip to Navigation Skip to Content

What You Can Expect:

The most in-stock parts on the planet — all OEM, all the time
Cool technology to make finding and buying parts a breeze, including Serial Number Lookup, PartSPIN® and Smart Manuals, found on partstown.com and our industry-leading mobile app
An exceptional customer experience from the team you know and trust with every email, live chat, text and phone call, provided by a friendly and knowledgeable team
Later hours than anyone else — offering support and shipping all in-stock orders until 9PM ET

ribbon image

Real OEM HVAC Parts Are In This Spring! SHOP NOW

find parts
find manuals

Find Foodservice Equipment Parts

Enter keyword or Part #

Lennox Sensor with Wire Lead, Return Air 31M70

Drag to spin

How to get it fast to ?

Ship It!

In Stock
Ships today from Parts Town Ships from Parts Town

Ships from

Promotional Price:

258.46 $ My Price: $ 258.46

Add to cart

0 more Purchase Options for Shipping
1-Hour Pickup!

Quantity Available:

Pickup hours: Mon - Fri
My Price:

Add to cart

more pickup options

See Local Inventory
Same Day Delivery!
Our same-day delivery window is now closed. Orders placed at this time will be delivered on the next business day. The Delivery Fee is not refundable if the order is canceled after the driver is in route to pick up the order.

Quantity Available:
My Price:

Add to cart

Card Label

Billing Address

First Name

Last Name

Address Line

Apt or Suite Number

City

Country/Region

State/Province

Zip/Postal Code

List Price:

$ 357.02

Quantity Available:

2

Quantity Available:

2

Manufacturer:

Lennox

Manufacturer #:

31M70

Parts Town #:

LEN31M70

Replaced by PT #:

LEN19L22

Units:

Each

Fits Models:

View Models List

Lennox Sensor with Wire Lead, Return Air 31M70

A Lennox 31M70 Sensor that monitors and reports air temperature to help regulate system performance in HVAC equipment.

Real OEM sensors are engineered to precise factory standards, ensuring your system responds accurately and maintains optimal indoor conditions season after season.
Product Type: Sensor
Lead Type: Wire Lead
Application: Return Air

Required fields.

Card Label

Expiration Date

Billing Address

First Name

Last Name

Address Line

Apt or Suite Number

City

Country/Region

State/Province

Zip/Postal Code

Fits Models
Specs

Length:

7.2 in / 18.29 cm
Width:

7.15 in / 18.16 cm
Height:

4.4 in / 11.18 cm
Weight:

0.36 lbs / 163 g