SerialAtlas
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HVAC date-code guide

Heil serial number lookup

Heil is an ICP contractor brand. Its modern serials generally use the shared ICP plant, year, and production-week arrangement found across related residential equipment.

Parent
International Comfort Products / Carrier Global
Common code
A plant letter is followed by a two-digit year and two-digit production week (LYYWW).
Reviewed
August 8, 2026

Instant equipment lookup

Decode the manufacturing date

Runs on this device
Equipment type

Using A plant letter is followed by a two-digit year and two-digit production week (LYYWW).

Type exactly what is printed. Spaces and dashes are ignored.

Optional: add model number for capacity cluesAdd model

Model decoding is labeled as a clue unless the exact format is documented.

No signupNo uploadNo serial-number tracking

EQUIPMENT DATA
MODEL24ABC636A003
SERIAL5019X30312
WeekYear

See exactly how the code was read

SerialAtlas highlights the date characters, names the matching rule, and shows alternative interpretations when the code is ambiguous.

  • Current age calculated automatically
  • Confidence and rule source shown
  • Optional model-capacity clue

Evidence-led route update

Heil date-code evidence

If you need to estimate a Heil unit’s manufacture age, use the ICP plant, year, and production-week positions in the serial.

Read Heil through the ICP family without losing the label context

A plant letter is followed by a two-digit year and two-digit production week (LYYWW). Heil is represented by the verified ICP LYYWW family. The shared manufacturing context helps, but a Heil plate from another era or market can still require official confirmation. Heil is represented by the verified ICP LYYWW family, with plant, year, and production week near the front. The Heil brand and equipment type still matter because a family relationship is not a universal historical rule.

Worked example: E142320733

E142320733 — The verified decoder reads this fixture as Week 23 of 2014. The date is a manufacture estimate, not an installation date.

When an older Heil plate departs from the common ICP read

A legacy or non-residential Heil unit may not fit the common plant-year-week positions. Keep the label readable, avoid sealed compartments, and use official support for the unresolved format.

Model number vs. serial number

Use the Heil model for equipment-family context and the serial for the ICP date evidence; official support needs both. Check the outdoor cabinet, furnace, air handler, or packaged-unit label and distinguish the serial from the model number.

Limits and official support

ICP labels can vary by era, market, and product line. If the result affects warranty, registration, parts, safety, or replacement decisions, use the complete model and serial with the manufacturer or a qualified professional. SerialAtlas is an independent reference, not an official warranty lookup or warranty coverage decision.

Open Heil support route

How to read a Heil serial number

A plant letter is followed by a two-digit year and two-digit production week (LYYWW). SerialAtlas removes spacing and punctuation, then applies only the documented rule families mapped to Heil. The lookup remains in the browser.

Try this documented-style exampleE142320733Load example

Equipment covered

  • air conditioners
  • heat pumps
  • furnaces
  • air handlers
  • packaged systems

Commercial, imported, very old, specialty, and private-label equipment can use a different code. Confirm the full rating plate before accepting a result.

Where to find the rating plate

  • Outdoor condenser or heat-pump cabinet, usually near the service valves
  • Inside the furnace or air-handler access panel
  • On the packaged-unit rating plate
  • Near the electrical disconnect or wiring diagram

Why more than one date can appear

Two-digit years and repeating letter cycles can point to more than one era. SerialAtlas ranks the plausible dates but keeps materially different alternatives visible. Label design, refrigerant, installation records, and product literature can resolve the era.

Source and verification

Inspector Handbook open reference data (CC BY 4.0). Independently implemented and reviewed August 8, 2026.

Open reference source

What this result does not prove

A manufacture date is not an installation date, warranty decision, recall match, condition assessment, or replacement recommendation. Confirm high-stakes decisions with the manufacturer or a qualified professional.