ShieldTune is your AI mentor — ask about equipment in plain English or Spanish, get an answer straight from the service manual in seconds. Fault codes, specs, step-by-step procedures. No PDF hunting. No waiting on a senior tech.
"Finally stopped texting my supervisor every time I see a weird fault code."
Marcus T. · HVAC Student, Wake Tech"Pulled up a torque spec mid-job from my phone. Didn't have to run back to the truck."
Darnell P. · Apprentice Tech"It's like having a senior tech in your pocket who actually answers you."
Sofia R. · Electrical Student"My whole class uses it now. Way better than hunting through a 400-page PDF."
Jaylen K. · HVAC Student"Pregunté en español y me dio la respuesta exacta con la sección del manual."
Carlos M. · Field Technician"Finally stopped texting my supervisor every time I see a weird fault code."
Marcus T. · HVAC Student, Wake Tech"Pulled up a torque spec mid-job from my phone. Didn't have to run back to the truck."
Darnell P. · Apprentice Tech"It's like having a senior tech in your pocket who actually answers you."
Sofia R. · Electrical Student"My whole class uses it now. Way better than hunting through a 400-page PDF."
Jaylen K. · HVAC Student"Pregunté en español y me dio la respuesta exacta con la sección del manual."
Carlos M. · Field Technician100 spots. When they're gone, they're gone.
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Go to the App →No setup, no navigation. Open the app and start asking — in English or Spanish.
Go to app.shieldtune.com on any device. No downloads, no setup — manuals are already loaded and ready.
Type in plain English or Spanish — fault codes, pressure specs, wiring, repair steps. Just ask.
Instant answer with the manual section cited, so you can verify it yourself on the job.
Every feature exists because a tech needed it on a real job.
Type a code, get the full breakdown — what it means, why it happened, and how to fix it.
Describe what the unit is doing — get a ranked list of possible causes and what to check first.
Repair and maintenance steps broken into a clear list with safety warnings included.
Designed for a greasy thumb on a phone screen. Fast, readable, and usable one-handed in the field.
Ask in either language and get your answer in the same language. No switching needed.
New manufacturers and equipment libraries are added continuously throughout the beta. As a beta user, you get new brands the moment they drop.
We train our AI Mentor on manufacturers' full service documentation — fault codes, specifications, installation guides, and repair procedures. New brands are added continuously throughout the beta.
This isn't just early access. You're shaping what the app becomes.