TSB 2025–2026 Super Duty HVAC — 26-2439

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Technical Service Bulletin · TSB 26-2439

This is a Technical Service Bulletin, not a recall. A TSB tells dealers how to diagnose and repair a specific symptom when a truck comes in with it. It doesn't mean every truck listed has the problem, and it doesn't by itself make the repair free -- coverage depends on your warranty and the dealer's diagnosis.

Published: Oct 21, 2026
Applies to: F-250, F-350, F-450, F-550 (2025–2026 model years)

Summary (official text)​

Some of the vehicles listed in the Model statement above may exhibit the HVAC (heating, ventilation, and air conditioning) and radio system turning off or radio may have no audio during snowplow operation. This may be due to the software in the powertrain control module (PCM).

Sources​

• TSB 26-2439 (PDF, NHTSA document 11038616) — Oct 21, 2026

Details from NHTSA as of Oct 22, 2026. If NHTSA or Ford revises this notice, this post is updated and significant changes are noted in a reply. The linked documents are the authority, and a dealer can confirm whether it applies to your VIN.

Have you experienced this issue with your truck? Let us know your model year and engine, plus any diagnosis or repair details.