POS operations guide
HVAC service contractor diagnostic, estimate, recurring-maintenance, refrigerant-cost and client-balance POS workflow
HVAC work joins service intake, equipment-specific diagnostics, estimate approval, qualified technicians, parts and refrigerant custody, recurring maintenance, callbacks and account billing. Keep diagnosis, accepted scope, work evidence, stock movement, actual cost, invoice and client balance separate.
Evidence and jurisdiction boundary
Evidence reviewed 2026-09-09. Reviewed the current Posnic release boundary and archived customer, sale and item models alongside current US EPA Section 608 certification and stationary-refrigeration recordkeeping guidance and the ENERGY STAR maintenance checklist. These primary US sources do not replace manufacturer instructions or the licensing, electrical, mechanical, refrigerant, safety and consumer rules where a contractor operates.
Stable release: v1.6.1. This page does not establish a live HVAC deployment, correct diagnosis, valid technician credential, accepted work, compliant refrigerant handling, safe equipment, completed commissioning, client sign-off or payment settlement. Product evidence remains pinned to an archived source snapshot.
What the current product evidence establishes
Client and balance fields exist
Customer identity, balance and payment-term fields can be inspected for a client or payer. They do not prove site access, equipment ownership, work authority or privacy compliance.
Quote and sale records exist
Quotation and sale lines can model diagnostics, labour, recurring maintenance, parts, refrigerant charges, credits and refunds. They do not prove work or safety.
Item history can be evaluated
Item and stock-history paths can be tested for parts, filters, consumables and refrigerant. They do not replace cylinder, recovery, transfer, leak-test or disposal records.
Technical work remains outside POS
Diagnosis, credential scope, electrical isolation, refrigerant handling, repair verification, commissioning and local reporting require qualified review.
HVAC service contractor POS controls before rollout
A booked visit is not a diagnosis, an invoice is not a refrigerant record, and payment is not proof that equipment is safe or repaired.
| Area | Record to keep | Why it matters | Acceptance check |
|---|---|---|---|
| Client, site, payer and equipment | Contracting party, service site, billing entity, equipment identifier, model, serial, location, access and privacy boundary. | Owner, occupant, manager and payer may differ; one site may contain many appliances. | Every job and charge resolve to the right client and equipment. |
| Intake and diagnostic | Reported symptom, operating state, prior work, observations, measurements, method, instrument, technician, time, uncertainty and assessment. | A customer description or fault code alone is not a diagnosis. | Original readings and revisions remain attributable. |
| Estimate and authority | Labour, parts, refrigerant, subcontract, disposal, exclusions, tax, price, validity, approval, limit and version. | Scope can change after diagnosis or strip-down. | Accepted version and approving party remain identifiable. |
| Credential and work gate | Technician credential, equipment category, jurisdiction, evidence, service type and required supervision. | A staff assignment does not establish authority for refrigerant or regulated work. | Missing or out-of-scope evidence blocks ready status. |
| Recurring maintenance | Agreement period, planned date, equipment tasks, visit reference, technician, access window and billing rule. | Planned, assigned, attended, maintained, evidenced and billed are distinct. | No charge is raised from schedule alone. |
| Work evidence | Arrival, equipment, diagnostic reference, work performed, part fitted, settings, measurements, test result, technician, time and completion. | A generic sale line cannot prove correct repair or commissioning. | Operational evidence is linked without being invented by POS. |
| Refrigerant record | Refrigerant type, cylinder reference, quantity recovered, added, removed or transferred, leak inspection, repair and verification references. | Purchased, issued, charged, recovered and returned quantities differ. | Custody and required service records reconcile separately from billing. |
| Safety and client hand-off | Isolation, PPE, hazard, equipment status, operating instruction, unresolved defect, emergency information and acknowledgement. | Safety duties depend on equipment, work, people and jurisdiction. | Invoice status cannot override an unsafe or incomplete state. |
| Part and refrigerant movement | Stock issue, item or cylinder, batch or serial, quantity out, actual use, recovery, return, transfer, reclamation, disposal and owner. | Stock movement is not installation or environmental-compliance evidence. | Every quantity adjustment has a reason and owner. |
| Cost and client charge | Estimated and actual labour, part, refrigerant, freight, equipment and subcontract cost plus accepted client price. | Cost, landed cost and sale price affect margin differently. | Cost changes do not overwrite client approval. |
| Callback or repeat fault | Complaint, new diagnostic evidence, cause review, warranty boundary, revisit, extra work, credit and resolution. | A repeat fault is not silently a completed new sale. | Original service and every decision stay visible. |
| Invoice and collection | Invoice period, evidenced visits, approved work, parts, refrigerant charge, tax, credit, due date, payment and reversal. | Revenue and remaining service obligations diverge. | Client balance reconciles to accepted and evidenced work. |
| Owner close | Open diagnostics, estimates, visits, parts and refrigerant movement, callbacks, sales, receivables, credits, incidents and margin. | Cash close alone hides operational risk. | Finance, stock and service obligations close together. |
Practical workflow
Identify equipment before diagnosis
Record the site, appliance, symptom, operating state, measurements and uncertainty before selecting work or price.
Version estimate and authorization
Keep diagnosis, alternatives, parts, refrigerant, labour, exclusions, approval limit and accepted version visible.
Link evidence before invoicing
Keep technical, refrigerant and safety evidence in the operational record, then invoice only accepted, evidenced work.
Close callbacks with the balance
Review repeat faults, revisits, stock adjustments, warranty decisions, credits and unpaid invoices beside the original job.
Diagnostic-to-payment flow
Identify and diagnose
Capture client, equipment, symptom, measurements, method and uncertainty.
Estimate and authorize
Version work, parts, refrigerant, price, exclusions and approval.
Service and verify
Keep work, parts, refrigerant, safety, testing and completion evidence outside the invoice.
Invoice evidenced work
Reconcile visits, labour, parts, refrigerant charges, credits, tax and approval.
Collect and review
Close payment, client balance, callbacks, stock, cost and open service obligations.
Hardware, software and data setup
Hardware
- Office computer or tablet and quote or receipt printer.
- Field device only after offline, access-control and privacy testing.
- Separate appropriate diagnostic, electrical and refrigerant-service equipment; POS is not a technical instrument.
- Barcode scanner where part, cylinder or batch workflows support it.
- Payment terminal without storing card data in POS.
- Off-device backup for client, equipment, service-reference, stock and payment records.
Software and data
- Client, payer, site and equipment accounts using minimum necessary data.
- Separate diagnostic, recurring-maintenance, labour, part, refrigerant, callback, credit and refund items.
- Distinct requested, assigned, attended, diagnosed, authorized, serviced, evidenced, invoiced and paid states.
- Restricted access to credentials, measurements, refrigerant, incident and service references.
- Reports for balances, open work, stock movement, callbacks, credits and margin.
Setup sequence
- Write intake, equipment, diagnostic, estimate, authorization, credential, safety, service, refrigerant, callback, invoicing and credit rules.
- Create synthetic clients, sites, payers, appliances, services, technicians, parts, cylinders, refrigerants, consumables and payment labels.
- Version one diagnostic and accepted estimate.
- Assign a recurring visit without treating assignment as attendance or maintenance.
- Test technician-scope and work gates before dispatch.
- Test part issue, fit, removal, return and warranty references.
- Test refrigerant issue, actual use, recovery, return, transfer, reclamation or disposal references.
- Test failed access, unsafe condition, unavailable part, repeat fault, failed payment and credit.
- Reconcile invoices, receipts, stock movement, actual costs, callbacks and open visits.
- Back up and restore records, then obtain operations, licensing, refrigerant, safety, payment, privacy and local approval.
Product evidence to inspect
Mistakes to avoid
- Treating booking, dispatch, invoice or payment as proof of diagnosis or service.
- Using one client-level note for multiple appliances without equipment identity.
- Storing refrigerant as a generic item without operational type, cylinder, quantity and custody records.
- Using POS permissions as evidence of technician certification or work scope.
- Overwriting diagnostic, estimate, work, refrigerant or callback history.
- Putting access codes or sensitive site details on receipts.
- Promising energy savings, safety or compliance from a completed sale status.
- Importing real client data before backup and restore pass.
Use the blank HVAC service contractor POS acceptance record
The CSV keeps 24 controls blank until the exact workflow is tested, including equipment identity, diagnostics, estimate authority, technician gates, recurring maintenance, work and refrigerant evidence, costs, callbacks, invoices, credits and restore.
Primary sources used
Current stable release
Pinned source tree
EPA Section 608 certification
EPA refrigerant records
ENERGY STAR maintenance
Local authority
Confirm licensing, electrical and mechanical codes, refrigerant rules, records, warranties, disposal and consumer duties where work occurs.
Where Posnic fits
Posnic Community Edition can be evaluated for office estimates, client accounts, labour and material items, payment labels, controlled stock, credits and reports. Keep dispatch, equipment diagnostics, technician credentials, technical work records, refrigerant custody, safety, commissioning, incidents and legal reporting outside scope until the workflow passes the blank record.