Thermo King Red Alarm? We Read the Code and Fix It Fast
If your Thermo King display is showing a red alarm light, you're in the right place. This page is for drivers and fleets running Thermo King units anywhere in Dallas-Fort Worth who need that alarm cleared today, not next week.
Tell us your location, unit brand, set point and current reading — we load the truck before the tech leaves.
A red alarm on a Thermo King unit means the system has shut down or is about to shut down to protect itself from damage. It's not something to clear and ignore. The code behind that light points to a real problem, whether that's a high pressure cutout, a low oil level, an engine fault, or a sensor failure.
Common Thermo King Red Alarm Codes We See
- High discharge pressure
- Low refrigerant pressure
- Engine oil pressure fault
- Coolant temperature fault
- Battery voltage fault
Clearing the alarm without fixing the cause just means it comes back, usually at the worst possible time. Our tech reads the fault code directly off the controller, confirms the real cause with gauges and testing, and repairs the actual problem instead of just resetting the display.
Why Local Service Matters Here
Thermo King units built for over the road trucking see hard use across Dallas-Fort Worth, especially in summer heat that pushes high side pressures up fast. Our techs know the codes these units throw in this climate and what usually causes them here.
A cleared alarm and a running unit means your load stays at temperature and you stay on schedule instead of sitting at a truck stop waiting on a callback from a shop.
Call 972-703-4445 now and read us the alarm code from your display. We'll send a tech to wherever you're parked in Dallas-Fort Worth.
Related reefer repairs
Not sure this is the problem you have? These failures often show up together.
Where we handle this repair
We run mobile trucks across Dallas–Fort Worth. Pick the area closest to where your trailer sits.