AskMarcel: AI HVAC Diagnostic

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About this app

Stop wasting time on the job site. Fix it in seconds.

The average HVAC technician loses 45 minutes every day — hunting through PDFs, waiting on hold with manufacturer hotlines, or texting the senior guy for a fault code they've answered twenty times before.

There's a better way.

AskMarcel is the AI-powered field copilot built exclusively for HVAC & refrigeration professionals.
Whether you need a reliable AC repair app, a refrigeration troubleshooting guide, or a universal HVAC fault code reader, AskMarcel is the ultimate HVAC app you want beside you on every job — fast, accurate, and built for how you actually work.
🛠 EVERY BRAND. EVERY SYSTEM.
Stop switching between ten different apps and manufacturer portals. AskMarcel covers the full HVAC spectrum: heat pumps, boilers, VRF/VRV systems, AHUs, chillers, split systems, and ventilation — regardless of brand.
🧠 SMART CONTEXTUAL DIAGNOSIS
Type in an error code, describe a symptom, or photograph a nameplate. AskMarcel doesn't just retrieve a document — it understands the context of the fault and generates a clear, step-by-step resolution procedure tailored to that specific unit.
🧰 YOUR COMPLETE FIELD TOOLKIT
Instant fault code lookup across all major brands
Built-in trade calculations: heating curves, flow rates, refrigerant charge, duct sizing, pipe sizing
Quick access to wiring diagrams and technical documentation
🚀 WHY TECHS TRUST ASKMARCEL
Faster every call: Cut diagnostic search time from 45 minutes to seconds
No more callbacks: Validate your diagnosis before you act — avoid ordering the wrong part
Junior-proof your team: Give new techs the confidence to work independently on Level 1 & 2 faults — without blowing up your senior tech's phone
💼 BUILT FOR HVAC BUSINESSES
Deploy in 60 seconds — no server, no IT, no training course needed.
Flexible plans designed around seasonal workflows and variable team sizes.
🎁 7-DAY FREE TRIAL — NO CREDIT CARD REQUIRED
Try the full AskMarcel experience, risk-free.
Flexible weekly and monthly subscriptions available after your free trial ends.
Download AskMarcel. Never get stuck on a fault again.