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888.687.0539

Our office will be closed 9/7/2026 in observance of Labor Day. Orders placed during this time will be processed when our office opens 9/8/2026.

Our office will be closed 9/7/2026 in observance of Labor Day. Orders placed during this time will be processed when our office opens 9/8/2026.

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Popular Northern Lights Thermostats

Northern Lights Thermostat

As an Authorized Northern Lights Dealer, Diesel Parts Direct only sells genuine Northern Lights parts covered by a 6-month factory warranty.

If you do not see the Northern Lights thermostat you need in the quick links below, call us at 888.687.0539888.687.0539 or use our quote request form. Our knowledgeable staff will happily assist you.

NL-145206182

THERMOSTAT - M844L3 (180F/82C)

$61.14

NL-145206320
Hassle-Free Return Item

THERMOSTAT - M643 / M643K / M643M / NL643 (167DEGF/75DEGC)

$59.31

NL-35-10006

THERMOSTAT 160F/71C

$138.59

NL-35-11000
Hassle-Free Return Item

THERMOSTAT - L944D / M944T / M944W / NL944D2 (180DEGF/82DEGC)

$15.17

NL-600-421-6310

THERMOSTAT (169F/76C)

$154.38

NL-600-421-6650

THERMOSTAT (149F/65C, PURPLE)

$253.14

NL-DZ120917

THERMOSTAT 180F/82C

$64.28

888.687.0539 (U.S.)|225.706.4858 (Int.)

Monday-Friday 7am-5pm CST
8784 S. Choctaw Dr. Baton Rouge, LA 70815
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Caterpillar® and all of the Caterpillar® engine models listed on this website are registered trademarks of Caterpillar, Inc. Cummins® and all of the Cummins® engine models listed on this website are registered trademarks of Cummins. Detroit Diesel® and all of the Detroit Diesel® engine models listed on this website are registered trademarks of Daimler AG. John Deere® and all of the John Deere® engine models listed on this website are registered trademarks of John Deere. Allison Transmission® and all of their transmission models listed on this website are registered trademarks of Allison Transmission®. Diesel Parts Direct is not an authorized dealer for Caterpillar, Cummins, Detroit Diesel, John Deere, or Allison Transmission. None of the parts beginning with "DS" or "R" are genuine Caterpillar, Cummins, Detroit Diesel, John Deere, or Allison Transmission items.

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