Standards of Practice Independent technical review for residential mechanical systems. Comprehensive Hydronic Boilers, Ducted Central AC/HP & Furnaces.
Scope limitations & standards →
HVAC TRUECHECK ADVISORY INDEPENDENT MECHANICAL DIAGNOSTIC REVIEW
Trade Insider Verification • No Equipment Sales

Independent Technical Review of HVAC Diagnostics & Repair Invoices.

Before approving an unexpected $1,500+ mechanical repair or replacing a condemned unit, have an active trade service manager independently audit the contractor's diagnostic logs, manufacturer warranty records, and repair scope.

Electrical verification
OEM 10-Yr warranty database check
Secondary root-cause assessment
48-Hr Contractor Rebuttal Shield

Consumer Advisory Standard

Why third-party diagnostic verification is necessary

Contractor Commission Structures Residential service technicians frequently receive 8% to 12% commission incentives on equipment replacement sales, creating systemic pressure to condemn components without exhaustive testing.
Unclaimed Factory Warranties Equipment manufactured in the past 10 years typically retains active factory parts coverage. Retail labor bids often fail to credit homeowners for $0.00 OEM exchange components.
Never Left Hanging Every audit includes our 48-Hour Rebuttal Shield. If the contractor pushes back with technical jargon or excuses, forward their reply and we craft your written counter-response.

Technical Audit Methodology

Every submitted invoice and diagnostic ticket is examined against four trade benchmarks.

01

Physical Plausibility

Verification of recorded electrical measurements or visual evidence required to condemn high-value parts.

02

OEM Registry Search

Manufacturer database decoding (Carrier, Trane, Lennox, York, Weil-McLain) by serial number to confirm active warranty coverage before parts are purchased.

03

Secondary Culprits

Cross-examination of low-cost components ($20–$100 capacitors, pressure switches, expansion tanks) that commonly mimic catastrophic equipment failures.

04

Action & Rebuttal Shield

Turnkey labor benchmark and copy-paste pushback script, backed by 48 hours of written contractor rebuttal review to ensure you are never left without answers.

Pre-Audit Diagnostic Screener

Enter the diagnosis provided by your mechanical contractor to assess industry misdiagnosis frequency.

Advisory Fee Schedule

Clear, flat fees for documented technical evaluations. No retainers or hidden costs.

Most Common
Service Diagnostics Standard <12h

Diagnostic Sanity Check

For active service calls, claimed component failures, or unexpected repair invoices.

$49.00 flat fee
  • Electrical verification & plausibility check
  • OEM serial number warranty registration check
  • Fair market turnkey labor benchmark
  • Written technical pushback script
  • 48-Hour Rebuttal Shield Included (1 written counter-response)
  • Covers all Hydronic Boilers, AC, Heat Pumps & Furnaces
Never Left Hanging:

If the contractor pushes back with technical jargon or excuses, forward their reply via SMS/Email within 48 hours. We analyze their rebuttal and craft your written counter-response at no extra cost.

Technician currently on site? +$30.00

Select Priority 60-Minute Rush below for immediate queue prioritization.

Ductless Systems Advisory Q&A

Mini-Split Technical Q&A

Technical evaluation of ductless layout, turndown capacity, and brand selection.

$49.00 flat fee
  • Up to 3 specific engineering questions answered
  • Multi-zone turndown & short-cycling review
  • Cold-climate rating evaluation
  • Excludes installation quote audits due to architectural piping variables.
System Replacement Coming Soon

Replacement Bid Audit

Exhaustive line-item evaluation of full system replacement proposals.

$79.00 standard fee
  • AHRI matched directory verification
  • Federal 25C $2,000 tax credit eligibility
  • Equipment wholesale baseline benchmarking

Join Replacement Audit Waitlist:

Sample Technical Memorandum

Review the structure and documentation provided to clients upon audit completion.

Document: MEMO-TC-4821

Technical Diagnostic Evaluation

Subject: Trane XR14 Compressor Diagnostic Sanity Check

DIAGNOSTIC UNVERIFIED

Status: High Overpay Risk

Equipment: Trane 4TWR4036G
Quoted Repair: $3,450.00
OEM Parts Warranty: Active (Thru 2027)
Likely True Root: Dual-Run Capacitor

Technical Findings & Discrepancies

  1. Lack of Corroborating Electrical Evidence: The contractor's invoice does not record terminal resistance measurements (Common-to-Run, Common-to-Start, Run-to-Start). Condemning a compressor without documented electrical values violates recognized trade testing standards.
  2. Uncredited OEM Factory Coverage: Verification of serial number against the manufacturer registry confirms the compressor remains protected under a 10-year registered parts warranty until June 2027. The compressor carries an exchange cost of $0.00 from the local supply distributor.
  3. Secondary Component Probability: In 85% of documented service calls presenting these operational symptoms, failure is attributable to an out-of-tolerance dual-run capacitor ($20 wholesale cost, standard replacement $200–$280 turnkey).
Client Response Script

"I have submitted the diagnostic paperwork to an independent trade advisor for third-party review. Verification of our Trane serial number confirms the unit is under active factory parts warranty through June 2027, covering the compressor at zero equipment cost. Please provide the recorded C-R-S resistance Ohm readings and verify the run capacitor under load before we discuss authorizing compressor replacement."

48-Hour Contractor Rebuttal Shield Active Ticket #TC-4821

If the contractor pushes back, disputes the warranty, or responds with trade jargon, do not argue or authorize repairs. Forward their response via SMS/Email. We will evaluate their reply and provide your written counter-response at no additional charge within 48 hours.

Standards of Practice & Scope Limitations

Our ethical commitments regarding supported and unsupported mechanical systems.

Comprehensive Hydronic Heating & Boilers

We audit boiler and hydronic heating diagnostics across gas, oil, and electric systems—including safety relief valve discharge, expansion tanks, auto-fill valves, circulators, and zone valve controls.

Ductless Mini-Splits (Technical Q&A Only)

Because ductless multi-zone systems depend heavily on on-site architectural variables, we do not audit mini-split quote pricing. We offer our $49 Q&A consult to assess equipment capacity, turndown modulation, and brand selection.