# What Should an HVAC Work Order Include?
A work order has one job: to be the thing that survives the visit.
The technician leaves. The customer forgets. Three months later somebody has a question, and the work order is the only witness. If it cannot answer, it did not do its job — and the two fields most often missing are the two that matter most.
The complete list
| Section | Fields | Why |
|---|---|---|
| Identity | Work order number, date, technician | Without a number nobody can reference it |
| Customer | Name, phone, service address, billing address | The service address is not always the billing address |
| Equipment | Type, make, model, serial, install date, capacity, refrigerant, fuel, location | This is what makes the record joinable |
| Complaint | What the customer reported, in their words | Frames everything that follows |
| Readings | What was measured, with units | Turns an assertion into a finding |
| Diagnosis | What was found, and what proves it | The heart of the document |
| Work performed | What was done, what was verified | What the customer is paying for |
| Parts | Description, part number, quantity | Warranty, restocking, history |
| Labour | Hours on site, arrival and departure | Billing, and disputes about either |
| Recommendations | What should happen next, and how urgent | Where the next job comes from |
| Approval | What was quoted, what was agreed, what was declined | Prevents the argument |
| Signature | Name, signature, date | Prevents the other argument |
The two most often missing
The serial number. Without it, a work order attaches to a person rather than a machine. On a property with a furnace and an AC, "serviced the HVAC" cannot be resolved into which. Every equipment history worth having is built on serial numbers, and every one that never got built was missing this field.
The readings. "Capacitor bad" is an assertion. "Capacitor reading 6.1 µF against a 45/5 rating" is a finding. The second one survives a customer asking why they were charged, a manufacturer asking why a part was replaced under warranty, and a technician a year later trying to work out whether anything has changed.
A filled-in example
═══════════════════════════════════════════════════════════════
SUMMIT COMFORT HEATING & AIR WORK ORDER WO-7201
(555) 0134-8800 · License MC-448120 Date: 12 Sep 2026
Technician: Mike Johnson
───────────────────────────────────────────────────────────────
CUSTOMER SERVICE ADDRESS
Robert Mbeki 932 Kingsley Bend
(555) 0197-4312 Fairmont Valley, CO
r.mbeki@example.com Access: call before arriving
───────────────────────────────────────────────────────────────
EQUIPMENT
Central AC · Amana ASX16 · 3 ton
Serial: AM-1008993
Installed: 2007-11 (19 years)
Refrigerant: R-22
Location: Side of house
Warranty: Out of warranty
───────────────────────────────────────────────────────────────
REPORTED
"AC running constantly but the house will not come down."
READINGS
Supply air 55 °F
Return air 77 °F
Temperature split 22 °F (calculated)
Suction pressure 82 psig
Head pressure 240 psig
Supply voltage 241 V
Capacitor 6.1 µF (rated 45/5)
Compressor amps 0 A
DIAGNOSIS
Dual run capacitor reading 6.1 µF on the herm side against a
45/5 rating. Compressor would not start on a hard-start
attempt; windings test within spec, so the compressor itself
is serviceable.
WORK PERFORMED
Replaced the dual run capacitor with a matched 45/5. Verified
compressor and condenser fan amp draw within nameplate.
Temperature split 22°F at the return on departure. System
operating normally.
───────────────────────────────────────────────────────────────
PARTS QTY PART NO.
Run capacitor 45/5 µF 1 CAP-45-5
LABOUR
On site 10:30 – 12:00 1.5 hrs
───────────────────────────────────────────────────────────────
RECOMMENDATION
System is 19 years old with $1,175 of repairs in the last
three years and is on R-22, which is no longer produced.
Discussed replacement options with the customer; they asked
for a written quote. Not urgent — the system is running.
───────────────────────────────────────────────────────────────
Parts $118.00
Labour 1.5 hrs @ $145.00 $217.50
────────
TOTAL $335.50
Customer approval: [signature]
Signed: Robert Mbeki
Date: 12 Sep 2026
═══════════════════════════════════════════════════════════════
Read the recommendation again. It is specific, it is evidenced, and it records what the customer actually said. That paragraph is worth more than the rest of the document combined, because it is the only part that produces another job.
The blank template
═══════════════════════════════════════════════════════════════
[COMPANY] WORK ORDER [______]
[Phone] · License [____] Date: [__________]
Technician: [_____]
───────────────────────────────────────────────────────────────
CUSTOMER SERVICE ADDRESS
[Name] [Street]
[Phone] [City, State ZIP]
[Email] Access: [____________]
───────────────────────────────────────────────────────────────
EQUIPMENT
[Type] · [Make] [Model] · [Capacity]
Serial: [_______________]
Installed: [_______] ([__] years)
Refrigerant: [_______] Fuel: [_______]
Location: [_______________]
Warranty: [_______________]
───────────────────────────────────────────────────────────────
REPORTED
[In the customer's words]
READINGS
[Measurement] [value] [unit]
[Measurement] [value] [unit]
DIAGNOSIS
[What was found, and the reading that proves it]
WORK PERFORMED
[What was done, and what was verified before leaving]
───────────────────────────────────────────────────────────────
PARTS QTY PART NO.
[__________________] [__] [________]
LABOUR
On site [____] – [____] [___] hrs
───────────────────────────────────────────────────────────────
RECOMMENDATION
[What should happen next, how urgent, and what the customer said]
───────────────────────────────────────────────────────────────
Parts $[_______]
Labour [__] hrs @ $[____] $[_______]
──────────
TOTAL $[_______]
Customer approval: ________________________
Signed: ________________________
Date: ________________________
═══════════════════════════════════════════════════════════════
Where paper stops working
A paper work order does everything above perfectly well. What it cannot do:
- Join up. Three visits to the same serial number stay three sheets of paper in three folders.
- Arrive pre-filled. The technician writes the customer, address and equipment details out by hand, every time.
- Reach the office before the technician does. The invoice waits for the van.
- Be searched. "What did we do to this unit in 2024?" means opening a filing cabinet.
- Enforce itself. A field left blank on paper is blank forever. A required field is not.
That last one is the quiet difference. The serial number gets skipped on paper because skipping it costs nothing at the time.
The test
Hand the work order to someone who was not there, and who cannot ask you anything.
Can they tell what was wrong, what was done, what proves it, what it cost, and what should happen next?
If not, the missing answer is the one your customer — or your next technician — was going to need.
See a work order built on site → — the demo builds this document from what the technician records as they go, then closes it into an invoice.
Further reading: HVAC field service software · how to create an HVAC service report
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