Hearth Record

Electrical system: wiring: relays/solenoids (Mack)

Vehicle recall 23V-402. NHTSA received Mack Trucks, Inc.’s report on Jun 4, 2023.

NHTSA’s own record, on nhtsa.gov

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The short answer

NHTSA received Mack Trucks, Inc.’s report on Jun 4, 2023. Copied from NHTSA on Oct 27, 2026.

Every line below is in NHTSA’s own words, with its source beside it.

What’s wrong with it?

A relay that fails in the closed position will continue to power the cabin heater, overheating the relay and increasing the risk of a fire.

Mack Trucks, Inc.

(Mack) is recalling certain 2019-2023 LR battery electric trucks.

The power cables that connect to the windscreen heater relay may have a loose connection and cause the relay to fail.

Source:

NHTSA, Recalls flat file. Released Oct 27, 2026. Updated daily.

  • NHTSA’s part: Electrical system: wiring: relays/solenoids.

What should you do?

Dealers will tighten the power cable to relay connection, free of charge. Owner notification letters are expected to be mailed August 4, 2023. Owners may contact Mack’s customer service at 1-800-866-1177. Mack’s number for this recall is SCC0444.

Source:

NHTSA, Recalls flat file. Released Oct 27, 2026. Updated daily.

  • How to reach the firm: Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.nhtsa.gov.
  • Check a vehicle by its VIN at NHTSA: the recalls still open on it are listed there.

Which ones are recalled?

NHTSA counts 47 vehicles potentially involved, across everything this recall names.

Each model year opens its own page: every recall naming it, its owner complaints and its crash ratings.

Source:

NHTSA, Recalls flat file. Released Oct 27, 2026. Updated daily.

Who is recalling it?

  • Made by Mack Trucks, Inc..
Source:

NHTSA, Recalls flat file. Released Oct 27, 2026. Updated daily.

What the record doesn’t say

  • NHTSA’s recall file doesn’t say whether anyone was hurt. Owners’ complaints are counted on each vehicle’s page.
  • Whether one vehicle or seat has been fixed: only its maker, or NHTSA’s lookup with a VIN, can say.
  • How many have been returned or fixed isn’t in the notice.
Source:

Hearth Record wrote these lines.

Sources

  • National Highway Traffic Safety Administration, Recalls flat file (FLAT_RCL_POST_2010).

    Released Oct 27, 2026 and checked Oct 27, 2026. Updated daily. Public domain (U.S. Government work).

Source:

Vehicle, car seat, tire and vehicle equipment recalls, owner complaints and crash ratings are from the National Highway Traffic Safety Administration (NHTSA). Copied on Oct 27, 2026.

How to read a record

Four things every record does, shown on an example record made up for this guide.

An example record, made up for this guide

An example nursing home

Made up for this guide: no real place is shown

Not fully inspected in over two years (CMS flag)

11 health citations at the latest inspection cycle

The state average is 14.3.

Source:

CMS, State and US Averages and Health Deficiencies. Released Oct 8, 2026. Updated monthly.

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Every fact names its source.

Who published it, when, and how often it changes sit beside each fact, with a link to the agency’s own file.

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