HVAC Service Call Diagnostic Sheet

A one-page record of the complaint, readings, diagnosis and repair for any no-heat or no-cool call.

Saves on this device as you type. Nothing is sent to us.

Job

CompanyTechnicianDateCustomerAddress

Equipment

Indoor model / serialOutdoor model / serialRefrigerant / gas type

Complaint

Customer complaint	text
When it started / what changed	text
Thermostat setting and mode	text
Error codes displayed or stored	code

Readings

Supply voltage	V
Control voltage (R–C)	V AC
Amps (compressor / fan / blower)	A
Suction / liquid pressure	psig
Superheat / subcooling	°F
Return / supply temperature	°F
Static pressure	in. w.c.

Diagnosis and repair

Root cause	text
Parts replaced	text
System operation verified after repair
Recommendations given to customer

Notes and recommendations

Technician signatureCustomer signature

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General good practice for field reference. The equipment manufacturer's instructions and local code always come first. Suggest an improvement: hello@hvaccheatsheet.com.

HVAC Cheat Sheet · Free PT charts, code lookups and calculators for techs at hvaccheatsheet.com