Built by an HVAC pro. For HVAC pros.

Stop guessing.
Diagnose smarter.

FieldMind is the AI assistant built for HVAC technicians and homeowners — with real field knowledge baked in, not generic answers.

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// Features

Five tools.
One subscription.

Everything you need on the job — from diagnosis to estimating — powered by AI that actually understands HVAC.

🔍

Diagnostics

Describe the symptoms, get a step-by-step diagnostic path. Works through fault codes, refrigerant issues, airflow problems, and more — like having a senior tech in your pocket.

📐

System Sizing

Get load calc guidance and equipment recommendations based on square footage, climate zone, insulation, and more. Stop oversizing and undersizing.

🔧

Installation

Step-by-step installation guidance for any system type. Line set sizing, electrical requirements, startup procedures — all in plain English.

💰

Job Estimating

Get ballpark labor and material estimates fast. Know your numbers before you quote a job so you're never leaving money on the table.

😤

Tech Frustrations

Dial up the attitude when you need real talk. Vent about a problem and get straight answers without the corporate filter. You're in the field — you need real.

// Who It's For

Built for the field.
Useful at home.

🔧 HVAC Technicians

You're on the job, under pressure, and you need answers now — not a manual. FieldMind is your always-on senior tech.

  • Diagnose unusual faults faster
  • Get installation steps on-demand
  • Estimate jobs with confidence
  • Works on mobile from the field

🏠 Homeowners

Your AC is acting up and you don't know if it's a $50 fix or a $5,000 replacement. FieldMind helps you understand what's going on before you call anyone.

  • Understand what's wrong with your system
  • Know if a repair quote is fair
  • Get plain-English explanations
  • Make informed decisions, not expensive guesses
"Most HVAC AI tools give you textbook answers. FieldMind gives you field answers — the kind you'd get from someone who's actually been on rooftops in July."
— Joe Weikel, Former HVAC Co-Owner & Creator of FieldMind
// How It Works

Answers in seconds.
Not phone calls.

Snap a photo or say it out loud — FieldMind responds like a senior tech who's seen it all.

📷

Take a photo

Snap the unit, the fault code, the wiring — straight from your phone without leaving the app.

🎤

Or just say it

Hit the mic and describe what you're seeing. No typing while your hands are dirty.

Get a real answer

Not a generic FAQ. A step-by-step diagnostic path based on your exact situation.

FieldMind — Diagnostics
🎤 Voice
Unit's running but not cooling. Outdoor fan is spinning, compressor sounds like it's humming but the suction line is barely cold. Refrigerant is 410A.
FM

That symptom set — compressor running, suction line barely cold — points to one of three things. Here's how to narrow it down fast:


1. Check your pressures first.
On 410A you'd expect suction around 115–125 PSI and discharge around 375–400 PSI at typical load. If suction is low (under 90) and discharge is also low, you're looking at a low charge or a restriction. If suction is low but discharge is normal or high, suspect a bad compressor valve.


2. Feel the liquid line temperature.
Should be warm — close to outdoor ambient. If it's cold or room temp, you've got a restriction upstream (TXV, filter drier, or king valve partially closed).


3. Check superheat at the suction.
If superheat is high (over 20°F), you're either low on charge or starving the metering device. If superheat is near zero and the line is still barely cold, bad compressor is likely.


What are your pressures reading?

📷 Photo
Suction 78 PSI, discharge 180 PSI. [gauge photo attached]
FM

That's a classic low charge profile. Both suction and discharge are depressed together — compressor is working but there's not enough refrigerant mass to build head pressure.


Before you add refrigerant: check for an obvious leak first. With 410A systems this low, something let go. Common spots on this kind of reading:


• Schrader valve cores (check both)
• Flare connections at the linesets
• Evaporator coil (especially if it's older)
• Service valve packing


Leak check, repair, then recover/recharge to manufacturer spec. Don't just top it off.

Describe the symptom, system, or job situation... 🖼️   📷   🎤   ➤
// Pricing

Simple, honest pricing.

Start free, upgrade when you're ready. No hidden fees.

Homeowner

$12/mo
or $99/year — save 31%

For homeowners who want to understand their HVAC system and stop getting taken advantage of.

  • Diagnostics mode
  • System Sizing guidance
  • Plain-English explanations
  • Photo uploads for diagnosis
  • Mobile friendly
Get Started

Team

$399/yr
Up to 10 technicians

For HVAC companies who want their whole team on the same page with the same tools.

  • Everything in Pro
  • Up to 10 team members
  • Centralized billing
  • Team management dashboard
  • Invite by email
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