SerialAtlas
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HVAC date-code guide

Intertherm serial number lookup

Intertherm is a manufactured-home brand within the Nortek family and commonly shares the Nordyne year/month positions used on residential furnaces, air handlers, and cooling equipment.

Parent
Nortek Global HVAC
Common code
A widely used style places a two-digit year in positions 4–5 and a two-digit month in positions 6–7.
Reviewed
August 8, 2026

Instant equipment lookup

Decode the manufacturing date

Runs on this device
Equipment type

Using A widely used style places a two-digit year in positions 4–5 and a two-digit month in positions 6–7.

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.

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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

Intertherm date-code evidence

If you need to estimate an Intertherm unit’s manufacture age, use the manufactured-home rating plate and preserve its full serial context.

Use manufactured-home context with the Nortek positions

A widely used style places a two-digit year in positions 4–5 and a two-digit month in positions 6–7. Intertherm is represented by the Nortek family’s year/month block in characters 4–7. Its manufactured-home context helps distinguish it from an unrelated serial format. Intertherm shares the verified Nortek year/month block in characters 4–7, and its manufactured-home context is part of the route-specific evidence. Record the exact equipment type before applying the position read.

Worked example: GBB030708229

GBB030708229 — The verified decoder reads this fixture as July 2003. The date is a manufacture estimate, not an installation date.

When an Intertherm plate belongs to another era

Intertherm equipment can vary across eras and Nortek product families. If the plate is faded, hidden, or inconsistent with the common positions, stop safely and use official support or a qualified technician.

Model number vs. serial number

Use the Intertherm model for manufactured-home equipment context and the serial for age; support needs the complete pair. Check the furnace, air handler, outdoor unit, or packaged equipment plate without opening sealed electrical or combustion compartments.

Limits and official support

Intertherm manufactured-home equipment can vary by era and Nortek product family. 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 Intertherm support route

How to read a Intertherm serial number

A widely used style places a two-digit year in positions 4–5 and a two-digit month in positions 6–7. SerialAtlas removes spacing and punctuation, then applies only the documented rule families mapped to Intertherm. The lookup remains in the browser.

Try this documented-style exampleGBB030708229Load example

Equipment covered

  • air conditioners
  • heat pumps
  • furnaces
  • air handlers
  • manufactured-home 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.