Semi-Truck Mirror Adjustment and Heater Control Module Failure | UpFix

Why Don’t My Mirrors Adjust or Heat Up?

When mirrors stop adjusting or heating, the cause is often an electronic failure in the mirror control module. This board manages current for the adjustment motors and heating elements.

Exposure to moisture and constant vibration causes corrosion on the connectors or burnout of the relay transistors.

Common Symptoms

• Mirrors won’t move or only move one direction

• Mirror heaters not warming up

• Fuses keep blowing

• No voltage at mirror connector

Repair Process

UpFix repairs and tests mirror modules by cleaning contacts, replacing failed transistors, and verifying power output to both adjustment motors and heating elements.

Why Repair Makes Sense

Replacing the entire assembly can cost hundreds and still require wiring modifications. Repairing through UpFix ensures compatibility and keeps your original part functioning like new.

Supported Brands

Freightliner, Kenworth, Peterbilt, Volvo, International, Mack and others.

Get your truck back on the road and keep your costs low.
Send your part to UpFix for professional testing and repair.
We’ll restore it to like-new condition, save you up to 80% compared to buying new, and make it plug-and-play ready when returned.