Lot 51 Releases PlumbBros 2.4, Fixes Notebook Exception for HVAC Technicians

Lot 51 released PlumbBros 2.4 on March 1, 2026, and the changelog bluntly lists the fix: "Fixed exceptions when opening the Notebook for a Sim in the HVAC Technician career." PlumbBros is presented by Lot 51 as "a popular realistic heating & cooling mod for The Sims 4 that adds central HVAC mechanics, with thermostats, outdoor condenser units, vents and togglable lot-level HVAC behavior," and the March 1 entry on Lot 51's timeline carries the site prompt "Download Release."

The PlumbBros 2.4 patch arrives amid a compressed run of Lot 51 core-library and companion releases. Two weeks earlier Lot 51 published Core Library 1.39 on February 16, 2026, with a fix described as "Fixes an exception when opening a Sim Picker and a sim has a custom CC career with a 64 bit ID." That Core Library entry explicitly noted scope: "+ This affects Suite Life, PlumbBros and Simzlink" and "+ This only affects players with Royalty & Legacy installed/enabled." The developer added technical color in the release text: "The Royalty & Legacy patch introduced a new Noble Career Sim Filter to every Sim Picker in the game. This causes the sim's career IDs to be sent to the UI and was made to only support 32 bit IDs. This patch just yeets 64 bit careers before sending to the UI."

Lot 51 continued follow-up work after PlumbBros 2.4. On March 2, 2026 the team put out Core Library 1.40.1 with two changelog lines that impact other mods: "1.40.1: Reroll to include PlumBuddy manifest" and "Improved FlagStatInteraction; This update is required to use the new Plum Telephone Company." That Plum Telephone Company mod then appeared as Plum Telephone Company 1.0.1 on March 6, 2026, with its own compatibility fix, "1.0.1: Fix exception when Parenthood is not installed," and the release note "Now available for everyone!"

Other mod activity in the same span included Smarter Phone Use 2.2.1 on February 27, 2026, which "Adds integration with upcoming Lot 51 Plum Telephone Company mod" and "Added Play Games interaction to block list," and Simzlink 1.10.4 on February 21, 2026, which "Fixed TV static being picked autonomously by sims channel surfing. Static should only be triggered if a lightning strike causes a Natural Outage." The Lot 51 timeline also lists The Sims 4 game update 1.121.372 dated February 19, 2026 with the entry "TDESC Release" and the site call to action "View Mod Status →."

Taken together the entries on Lot 51's release timeline show active maintenance across February 16 through March 6, 2026, with PlumbBros 2.4 addressing a career-specific Notebook crash while core-library updates and companion mods adjusted manifests and compatibility: "This release timeline includes mod releases and game updates starting from newest to oldest. Each game update now has its own page to track mod update status for breaking changes.