Pick Save as PDF as the destination, and turn on Background graphics if the colours look washed out. Six pages, one per sheet.

HVAC Assist Pro

The complete app guide

Everything HVAC Assist Pro does \u2014 for the technician on the call, and for the business that runs the crew.

What's inside

  • 02
    AI diagnostics
    The assistant, guided sessions, and the fault code decoder.
  • 03
    Resources & field tools
    Manuals, wiring diagrams, and every calculator in one place.
  • 04
    Community & learning
    The repair forum, reputation, and the Tech Tips library.
  • 05
    For businesses
    Team seats, the admin console, and account security.
  • 06
    Plans & getting started
    What it costs, how to start, and answers to common questions.

Every other tool gives you a number, a measurement, or a business process.

This one gives you a diagnosis \u2014 and checks its own work before it hands it over.

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HVAC Assist Pro
AI Diagnostics

An expert second opinion on every call

The core of the app. Describe the symptoms, answer a few questions, and get a diagnosis you can act on \u2014 with the reasoning shown, not hidden.

AI Pro Assistant

Describe what the unit is doing in plain English — “heat pump runs but never satisfies, outdoor unit ices up” — and get a working diagnosis back, not a wall of text.

  • Ranked likely causes, most probable first
  • Step-by-step tests to narrow it down
  • The exact readings needed to confirm each cause

Guided AI Diagnose sessions

A structured diagnostic conversation that asks one question at a time until the fault is pinned down.

  • Searches manuals for your exact brand and model
  • Asks for readings and interprets them for you
  • Every resolved session saved to your dashboard

Error & fault code decoder

Enter any manufacturer fault code and get the plain-English meaning, what usually triggers it, and how to clear it.

  • Carrier, Trane, Lennox, Goodman, Daikin and more
  • Common causes ranked by how often they turn out right
  • Step-by-step checks and reset procedures

Verified answers — it refuses to guess

Answers are grounded in manufacturer documentation rather than invented. Where the evidence is thin, the app says so and asks for the reading that settles it.

  • Flags open questions instead of filling gaps
  • Won't state a fault code it can't verify
  • You confirm the outcome, and that feedback improves it

How a session runs

1
Describe the problem
Type the symptoms in your own words — no forms, no codes required.
2
Answer the questions
The assistant asks for the readings that matter, one at a time.
3
Get the diagnosis
Ranked causes, the tests to confirm them, and the likely part or fix.
4
Confirm and save
Mark what actually fixed it. The session stays in your dashboard for next time.
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HVAC Assist Pro
Resources & Tools

The reference shelf and the toolbox

Everything you'd otherwise keep in a phone full of PDFs and a pocket of laminated cards \u2014 searchable, on the same screen as the diagnosis.

Resource library

Saved service manuals, wiring diagrams, quick references and service guides, organised by equipment type so you're not digging through a phone full of PDFs.

Manual search on the job

Search the web for the service manual or wiring diagram for any brand and model — while you're standing in front of the unit, not back at the van.

Field tools included

Refrigerant PT charts
R-410A, R-32, R-454B, R-22, R-134a and more
Superheat & subcooling
Including target superheat for the conditions
Static pressure
Total external static vs. nameplate
Airflow & CFM
Gas furnace and air handler CFM
Duct sizing
Round and rectangular, with velocity check
Electrical calculators
Ohm's law, single & three-phase, voltage drop
Wire sizing charts
Copper ampacity at 60°C and 75°C
Heat pump balance point
Capacity vs. heat loss, and the aux heat gap
Voltage unbalance
NEMA motor voltage unbalance check
HVAC formulas
The everyday equations, in one place
Reference charts
Boiler outdoor reset curves, thermistor resistance
Refrigerant reference
Properties and comparisons at a glance

A set of these calculators is open to anyone at hvacassistpro.com/calculators \u2014 no account needed.

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HVAC Assist Pro
Community & Learning

Learn from the whole trade

When the assistant can't settle it, the people who have seen it before can. The forum, the reputation system and the article library all feed each other.

Community repair forum

Post the problems that have you stuck and get answers from working technicians, sorted by equipment category.

  • Post by category — furnaces, AC, heat pumps, mini-splits, refrigeration, boilers, chillers and more
  • Mark the reply that fixed it as the accepted solution
  • Star-rate the solution so the best answers rise to the top

Reputation & leaderboard

Technicians earn reputation every time their answer is accepted. The leaderboard recognises the people who solve the most.

  • Reputation from accepted solutions
  • Star ratings on the fix that worked
  • A leaderboard that highlights top contributors

Tech Tips library

Short, practical articles written for the trade, organised by the same equipment categories as the forum — free to read.

Equipment categories covered

FurnacesAir ConditioningHeat PumpsMini-Splits & VRFRefrigerationBoilersChillersControlsElectrical & WiringRefrigerants & ChargingGeneral

The same categories run through the forum, the resource library and the Tech Tips articles, so a job stays in one place from the first symptom to the final fix.

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HVAC Assist Pro
For Business

Put the whole crew on it

A team plan covers your technicians seat by seat, with one console for the owner \u2014 and the account protection to make sure a seat stays with the tech it was bought for.

Team plan with volume pricing

Per-seat pricing that drops as you add technicians, with one console for the whole crew.

  • Seats from 1 up to 100
  • One admin console for invites, seats and billing
  • Add or remove technicians at any time

Invite your technicians

Enter an email address and the seat is reserved instantly. Existing accounts get access right away; everyone else gets an invitation to register.

  • Seat counter shows exactly what's in use
  • Remove a technician to free the seat for someone else
  • Revoked access takes effect immediately

Activate with a company code

Your business receives a single access code. The admin who redeems it links the company to their account and unlocks every seat.

Admin console

Everything the owner needs in one place.

  • Users and subscription status
  • Devices and sign-in activity
  • Finance reporting and lead inbox

Account security

Sign-ins are tracked per device, with a device limit that protects a paid seat from being passed around the crew.

  • Per-device registration
  • Alerts when a device limit is reached
  • Sign-in activity visible to admins

Session history & email summaries

Every diagnostic session is saved, and a summary can be emailed to you so the reasoning stays with the job.

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HVAC Assist Pro
Plans & Getting Started

What it costs, and how to start

One subscription unlocks the entire platform \u2014 diagnostics, tools, manuals and community. No hidden tiers.

Individual
$29/ month
  • 7-day free trial
  • Full platform access
  • Cancel anytime
Team
$26–$20per seat / month
  • Volume pricing by seat count
  • Admin console included
  • Billed every 30 days

Getting started in four steps

1
Create your account and start the 7-day free trial.
2
Use it in the browser, or download the iOS and Android apps — same account, same data.
3
Open the AI Assistant or start a Guided Diagnose session on your next call.
4
Running a crew? Activate your company access code and invite your technicians from the Team page.

Common questions

  • Does it work with the gauges I already own?
    Yes. HVAC Assist Pro is software — it works alongside the tools and instruments you already carry.
  • Is it brand-specific?
    No. It's brand-neutral and covers all major equipment types, from residential splits to commercial chillers.
  • Does it replace my dispatch or invoicing software?
    No — and it isn't meant to. It replaces the guesswork between the call and the fix.
  • Can my whole crew share one login?
    No. Seats are per technician, and the device limit is what keeps it that way. Team plans make adding each tech inexpensive.
  • What happens if I cancel?
    Access continues to the end of the period you've already paid for, then stops. A period already underway isn't refunded.

Ready to diagnose faster?

Start your free trial at hvacassistpro.com \u00B7 questions to Admin@hvacassistpro.com

iOS \u00B7 Android \u00B7 Web
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