Official HTPG warranty & serial services
Read the plate. Check the evidence.
Read documented HTPG weekly and legacy serial formats for production year, week or month, facility, sales-order fields and unit sequence.
Browse HTPG manuals and guides →Check a documented system
HTPG ten-character weekly and 15-, 17- or 18-character legacy layouts. The reviewed legacy family window is March 2005–April 2019; the weekly chart describes the 2018/2019 transition.
Read the label on your product
Plate locations vary by product. Use the equipment nameplate and exact model manual; the guidance below does not assign one cabinet location to every HTPG, Kramer, Russell, Witt or ColdZone unit.
The manual does not establish one universal panel location for all Kramer or HTPG products.
Kramer Thermobank II manual: model and serial on Kramer nameplate ↗
A compressor, motor or replacement part number must not be treated as the refrigeration unit serial.
Use the applicable chart for the actual plate and preserve unrecognized numbers intact for manufacturer research.
Scope matters
Research reviewed October 16, 2026. This independent tool applies published rules and retains unresolved years and model candidates.
Facility + WW + YY + five-character weekly sequence, in the post-2018 / 2019-transition documentation.
The numeric week is returned as encoded. The current manufacturer legend labels codes 34–37 inconsistently, so those readings require confirmation. Only documented codes 01–52 are accepted; no exact calendar day is derived. The sequence resets weekly and indicates scheduling/production order, not a guaranteed total of completed units. The current chart says post-April 1, 2018; the parts book says January 2019 onward. Facility W uses Nuevo Laredo in this format.
Documented legacy 8-digit order / 3-digit item / three-digit unit layout.
Facility + two-digit year + month letter + order, line item and unit fields. 8 order digits, 3 item digits and three unit digits are retained with leading zeros. W means Yuma for this legacy system. The broad reviewed family window follows March 2005–April 2019 in the 2025 parts book; another chart labels a pre-April 2018 transition. No global order-threshold or zero-padding chronology is enforced because the illustrations and notes conflict. Unit number is an ordinal within the line item, not an allotted quantity.
Documented legacy 6-digit order / 2-digit item / three-digit unit layout.
Facility + two-digit year + month letter + order, line item and unit fields. 6 order digits, 2 item digits and three unit digits are retained with leading zeros. W means Yuma for this legacy system. The broad reviewed family window follows March 2005–April 2019 in the 2025 parts book; another chart labels a pre-April 2018 transition. No global order-threshold or zero-padding chronology is enforced because the illustrations and notes conflict. Unit number is an ordinal within the line item, not an allotted quantity. The example omits the grey leading order zeros from the parts-book illustration to demonstrate the documented earlier six-digit-order layout; it is a format illustration, not a registry record.
Documented legacy 8-digit order / 2-digit item / three-digit unit layout.
Facility + two-digit year + month letter + order, line item and unit fields. 8 order digits, 2 item digits and three unit digits are retained with leading zeros. W means Yuma for this legacy system. The broad reviewed family window follows March 2005–April 2019 in the 2025 parts book; another chart labels a pre-April 2018 transition. No global order-threshold or zero-padding chronology is enforced because the illustrations and notes conflict. Unit number is an ordinal within the line item, not an allotted quantity.
Reading your result
Some systems reuse letters or only encode the last one or two year digits. Every supported interpretation is retained. A decade supplied from reliable records can narrow the reading; the tool does not automatically pick the newest year.
Usually the model is a separate plate field. Where published serial ranges actually identify a model, the result shows model candidates and links to their manuals. Overlapping ranges remain ambiguous.
After a lookup, the address includes the serial in a fragment beginning with #serial=. Use “Copy share link” to share the serial and selected context. Opening the link runs the same lookup. The fragment is not a query-string result page.