Guardian / Garage door opener / Model guide

Guardian 728B parts and component reference

Match Guardian 728B to its listed STDBAT battery, GUDT-319 holster, GUDT-349 motor and GUDT-353 opener cover using the official parts book.

US documentationSources checked 2026-09-12Independent Anderson reference

Match the model before choosing a document

Identifier: 728B. Keep every letter and suffix on your product label when checking applicability.

For 728B, the book lists STDBAT as the portable battery and GUDT-319 as a battery holster. These rows retain separate identifiers and do not establish that STDBBUKIT or a generic battery is interchangeable.

The assembly references include GUDT-349 for the DC motor, GUDT-322 for the logic board and GUDT-353 for the opener cover. The book places a qualified-technician replacement requirement after this model’s assembly table.

The accessory section names R2BCC and 3-FDCC. Read the exact 728B heading in the DOCX parts book before applying any listed component to a unit.

Documented specifications

Values apply to the configuration named in each row. Follow the source for its exact scope.
Portable Battery	STDBATListed for the exact 728B section in this book revision; no current-stock or later-revision interchangeability claim.Source: Guardian replacement parts book (official DOCX; cover dated October 1, 2024) · 728B section; native table 45, row 6, column group 2
Battery Holster	GUDT-319Listed for the exact 728B section in this book revision; no current-stock or later-revision interchangeability claim.Source: Guardian replacement parts book (official DOCX; cover dated October 1, 2024) · 728B section; native table 45, row 5, column group 2
DC Motor	GUDT-349Listed for the exact 728B section in this book revision; no current-stock or later-revision interchangeability claim.Source: Guardian replacement parts book (official DOCX; cover dated October 1, 2024) · 728B section; native table 45, row 5, column group 1
Logic Board	GUDT-322Listed for the exact 728B section in this book revision; no current-stock or later-revision interchangeability claim.Source: Guardian replacement parts book (official DOCX; cover dated October 1, 2024) · 728B section; native table 45, row 4, column group 1
Opener Cover	GUDT-353Listed for the exact 728B section in this book revision; no current-stock or later-revision interchangeability claim.Source: Guardian replacement parts book (official DOCX; cover dated October 1, 2024) · 728B section; native table 45, row 7, column group 1
Encoder Module	GUDT-314Listed for the exact 728B section in this book revision; no current-stock or later-revision interchangeability claim.Source: Guardian replacement parts book (official DOCX; cover dated October 1, 2024) · 728B section; native table 45, row 6, column group 1
Remote Control	R2BCCListed for the exact 728B section in this book revision; no current-stock or later-revision interchangeability claim.Source: Guardian replacement parts book (official DOCX; cover dated October 1, 2024) · 728B section; native table 44, row 3, column group 1
Deluxe Door Control Console	3-FDCCListed for the exact 728B section in this book revision; no current-stock or later-revision interchangeability claim.Source: Guardian replacement parts book (official DOCX; cover dated October 1, 2024) · 728B section; native table 44, row 5, column group 1

Official documents & support

These links open the manufacturer’s document or support page. Manuals are hosted by their issuer.

Filter the documents listed below by model or document type. A match is not confirmation of your unit’s revision or installed accessories; read the scope note before using a document.

1 of 1 listed documents shown.

parts list
Guardian 728B parts-list section — official DOCX parts book
Use the exact 728B heading in this manufacturer-hosted DOCX parts book. This link supplies a parts list, not a checked owner manual, installation procedure or PDF. The cover is dated October 1, 2024; the filename/path does not establish a newer revision.
Models: 728BenDocument: Cover dated October 1, 2024US

Parts & related references

Match the exact model and source conditions before choosing a part. Conditional statements and explicit exclusions do not confirm a fit. Open a row for its exact pairing and source.

Shared scope and cautions for the following 8 references

Applies only within this source scope

Market: US
Model scope: 728B
Exact model 728B listing in the replacement-parts book: Cover dated October 1, 2024. Confirm the exact part and installed configuration; a listing does not establish interchangeability with another revision, model or similarly named item.

Guardian 3-FDCC
3-FDCC is identified in the book as deluxe door control console. Its direct model listings belong to the cover dated October 1, 2024 source and require exact configuration confirmation.
Read the shared scope and cautions above
Exact pairing & sources for 3-FDCC · Conditional
3-FDCC is listed directly under model 728B in the cover dated October 1, 2024 parts book; confirm source revision and exact configuration.
From 3-FDCC to 728B
- Source 1: GuardianGuardian replacement-parts book, cover dated October 1, 2024 · DOCX native table 44, row 5, column group 1; exact model heading 728B; accessories item 4 · checked 2026-09-12 · Cover dated October 1, 2024
Guardian GUAT-022
GUAT-022 is identified in the book as door bracket. Its direct model listings belong to the cover dated October 1, 2024 source and require exact configuration confirmation.
Read the shared scope and cautions above
Exact pairing & sources for GUAT-022 · Conditional
GUAT-022 is listed directly under model 728B in the cover dated October 1, 2024 parts book; confirm source revision and exact configuration.
From GUAT-022 to 728B
- Source 1: GuardianGuardian replacement-parts book, cover dated October 1, 2024 · DOCX native table 42, row 3, column group 1; exact model heading 728B; installation item 2 · checked 2026-09-12 · Cover dated October 1, 2024
Guardian GUAT-023
GUAT-023 is the installation hardware bag listed under the model headings below. Its 628 manual entry identifies contents, quantities and nominal sizes; the older 315 manual cross-reference does not verify that same inventory.
Read the shared scope and cautions above
Exact pairing & sources for GUAT-023 · Conditional
GUAT-023 is listed directly under model 728B in the cover dated October 1, 2024 parts book; confirm source revision and exact configuration.
From GUAT-023 to 728B
- Source 1: GuardianGuardian replacement-parts book, cover dated October 1, 2024 · DOCX native table 42, row 4, column group 1; exact model heading 728B; installation item 3 · checked 2026-09-12 · Cover dated October 1, 2024
Guardian GUAT-024
GUAT-024 is identified in the book as curved door arm. Its direct model listings belong to the cover dated October 1, 2024 source and require exact configuration confirmation.
Read the shared scope and cautions above
Exact pairing & sources for GUAT-024 · Conditional
GUAT-024 is listed directly under model 728B in the cover dated October 1, 2024 parts book; confirm source revision and exact configuration.
From GUAT-024 to 728B
- Source 1: GuardianGuardian replacement-parts book, cover dated October 1, 2024 · DOCX native table 42, row 5, column group 1; exact model heading 728B; installation item 4 · checked 2026-09-12 · Cover dated October 1, 2024
Guardian GUAT-025
GUAT-025 is identified in the book as straight door arm. Its direct model listings belong to the cover dated October 1, 2024 source and require exact configuration confirmation.
Read the shared scope and cautions above
Exact pairing & sources for GUAT-025 · Conditional
GUAT-025 is listed directly under model 728B in the cover dated October 1, 2024 parts book; confirm source revision and exact configuration.
From GUAT-025 to 728B
- Source 1: GuardianGuardian replacement-parts book, cover dated October 1, 2024 · DOCX native table 42, row 6, column group 1; exact model heading 728B; installation item 5 · checked 2026-09-12 · Cover dated October 1, 2024
Guardian GUAT-026
GUAT-026 is identified in the book as emergency release handle and rope. Its direct model listings belong to the cover dated October 1, 2024 source and require exact configuration confirmation.
Read the shared scope and cautions above
Exact pairing & sources for GUAT-026 · Conditional
GUAT-026 is listed directly under model 728B in the cover dated October 1, 2024 parts book; confirm source revision and exact configuration.
From GUAT-026 to 728B
- Source 1: GuardianGuardian replacement-parts book, cover dated October 1, 2024 · DOCX native table 42, row 7, column group 1; exact model heading 728B; installation item 6 · checked 2026-09-12 · Cover dated October 1, 2024
Guardian GUAT-027
GUAT-027 is identified in the book as header bracket. Its direct model listings belong to the cover dated October 1, 2024 source and require exact configuration confirmation.
Read the shared scope and cautions above
Exact pairing & sources for GUAT-027 · Conditional
GUAT-027 is listed directly under model 728B in the cover dated October 1, 2024 parts book; confirm source revision and exact configuration.
From GUAT-027 to 728B
- Source 1: GuardianGuardian replacement-parts book, cover dated October 1, 2024 · DOCX native table 42, row 2, column group 1; exact model heading 728B; installation item 1 · checked 2026-09-12 · Cover dated October 1, 2024
Guardian GUAT-201
GUAT-201 is identified in the book as photo eye safety system (emitter + sensor with brackets). Its direct model listings belong to the cover dated October 1, 2024 source and require exact configuration confirmation.
Read the shared scope and cautions above
Exact pairing & sources for GUAT-201 · Conditional
GUAT-201 is listed directly under model 728B in the cover dated October 1, 2024 parts book; confirm source revision and exact configuration.
From GUAT-201 to 728B
- Source 1: GuardianGuardian replacement-parts book, cover dated October 1, 2024 · DOCX native table 44, row 2, column group 1; exact model heading 728B; accessories item 1 · checked 2026-09-12 · Cover dated October 1, 2024

Shared scope and cautions for the following 10 references

Applies only within this source scope

Market: US
Model scope: 728B
Exact model 728B listing in the replacement-parts book: Cover dated October 1, 2024. Confirm the exact part and installed configuration; a listing does not establish interchangeability with another revision, model or similarly named item.
The source footnote for this assembly table requires replacement by a qualified technician.

Guardian GUDT-301
GUDT-301 is identified in the book as chassis. Its direct model listings belong to the cover dated October 1, 2024 source and require exact configuration confirmation.
Read the shared scope and cautions above
Exact pairing & sources for GUDT-301 · Conditional
GUDT-301 is listed directly under model 728B in the cover dated October 1, 2024 parts book; confirm source revision and exact configuration.
From GUDT-301 to 728B
- Source 1: GuardianGuardian replacement-parts book, cover dated October 1, 2024 · DOCX native table 45, row 2, column group 1; exact model heading 728B; assembly item 1 · checked 2026-09-12 · Cover dated October 1, 2024
- Source 2: GuardianGuardian replacement-parts book, cover dated October 1, 2024 · DOCX native table 45, row 2, column group 1; exact model heading 728B; assembly item 1; qualified-technician footnote immediately following native assembly table 45 · checked 2026-09-12 · Cover dated October 1, 2024
Guardian GUDT-309
GUDT-309 is identified in the book as lamp plate. Its direct model listings belong to the cover dated October 1, 2024 source and require exact configuration confirmation.
Read the shared scope and cautions above
Exact pairing & sources for GUDT-309 · Conditional
GUDT-309 is listed directly under model 728B in the cover dated October 1, 2024 parts book; confirm source revision and exact configuration.
From GUDT-309 to 728B
- Source 1: GuardianGuardian replacement-parts book, cover dated October 1, 2024 · DOCX native table 45, row 2, column group 2; exact model heading 728B; assembly item 7 · checked 2026-09-12 · Cover dated October 1, 2024
- Source 2: GuardianGuardian replacement-parts book, cover dated October 1, 2024 · DOCX native table 45, row 2, column group 2; exact model heading 728B; assembly item 7; qualified-technician footnote immediately following native assembly table 45 · checked 2026-09-12 · Cover dated October 1, 2024
Guardian GUDT-310
GUDT-310 is identified in the book as light lens. Its direct model listings belong to the cover dated October 1, 2024 source and require exact configuration confirmation.
Read the shared scope and cautions above
Exact pairing & sources for GUDT-310 · Conditional
GUDT-310 is listed directly under model 728B in the cover dated October 1, 2024 parts book; confirm source revision and exact configuration.
From GUDT-310 to 728B
- Source 1: GuardianGuardian replacement-parts book, cover dated October 1, 2024 · DOCX native table 45, row 3, column group 2; exact model heading 728B; assembly item 8 · checked 2026-09-12 · Cover dated October 1, 2024
- Source 2: GuardianGuardian replacement-parts book, cover dated October 1, 2024 · DOCX native table 45, row 3, column group 2; exact model heading 728B; assembly item 8; qualified-technician footnote immediately following native assembly table 45 · checked 2026-09-12 · Cover dated October 1, 2024
Guardian GUDT-311
GUDT-311 is identified in the book as lamp lens clip. Its direct model listings belong to the cover dated October 1, 2024 source and require exact configuration confirmation.
Read the shared scope and cautions above
Exact pairing & sources for GUDT-311 · Conditional
GUDT-311 is listed directly under model 728B in the cover dated October 1, 2024 parts book; confirm source revision and exact configuration.
From GUDT-311 to 728B
- Source 1: GuardianGuardian replacement-parts book, cover dated October 1, 2024 · DOCX native table 45, row 4, column group 2; exact model heading 728B; assembly item 9 · checked 2026-09-12 · Cover dated October 1, 2024
- Source 2: GuardianGuardian replacement-parts book, cover dated October 1, 2024 · DOCX native table 45, row 4, column group 2; exact model heading 728B; assembly item 9; qualified-technician footnote immediately following native assembly table 45 · checked 2026-09-12 · Cover dated October 1, 2024
Guardian GUDT-314
GUDT-314 is identified in the book as encoder module. Its direct model listings belong to the cover dated October 1, 2024 source and require exact configuration confirmation.
Read the shared scope and cautions above
Exact pairing & sources for GUDT-314 · Conditional
GUDT-314 is listed directly under model 728B in the cover dated October 1, 2024 parts book; confirm source revision and exact configuration.
From GUDT-314 to 728B
- Source 1: GuardianGuardian replacement-parts book, cover dated October 1, 2024 · DOCX native table 45, row 6, column group 1; exact model heading 728B; assembly item 5 · checked 2026-09-12 · Cover dated October 1, 2024
- Source 2: GuardianGuardian replacement-parts book, cover dated October 1, 2024 · DOCX native table 45, row 6, column group 1; exact model heading 728B; assembly item 5; qualified-technician footnote immediately following native assembly table 45 · checked 2026-09-12 · Cover dated October 1, 2024
Guardian GUDT-319
GUDT-319 is identified in the book as battery holster. Its direct model listings belong to the cover dated October 1, 2024 source and require exact configuration confirmation.
Read the shared scope and cautions above
Exact pairing & sources for GUDT-319 · Conditional
GUDT-319 is listed directly under model 728B in the cover dated October 1, 2024 parts book; confirm source revision and exact configuration.
From GUDT-319 to 728B
- Source 1: GuardianGuardian replacement-parts book, cover dated October 1, 2024 · DOCX native table 45, row 5, column group 2; exact model heading 728B; assembly item 10 · checked 2026-09-12 · Cover dated October 1, 2024
- Source 2: GuardianGuardian replacement-parts book, cover dated October 1, 2024 · DOCX native table 45, row 5, column group 2; exact model heading 728B; assembly item 10; qualified-technician footnote immediately following native assembly table 45 · checked 2026-09-12 · Cover dated October 1, 2024
Guardian GUDT-321
GUDT-321 is identified in the book as transformer. Its direct model listings belong to the cover dated October 1, 2024 source and require exact configuration confirmation.
Read the shared scope and cautions above
Exact pairing & sources for GUDT-321 · Conditional
GUDT-321 is listed directly under model 728B in the cover dated October 1, 2024 parts book; confirm source revision and exact configuration.
From GUDT-321 to 728B
- Source 1: GuardianGuardian replacement-parts book, cover dated October 1, 2024 · DOCX native table 45, row 3, column group 1; exact model heading 728B; assembly item 2 · checked 2026-09-12 · Cover dated October 1, 2024
- Source 2: GuardianGuardian replacement-parts book, cover dated October 1, 2024 · DOCX native table 45, row 3, column group 1; exact model heading 728B; assembly item 2; qualified-technician footnote immediately following native assembly table 45 · checked 2026-09-12 · Cover dated October 1, 2024
Guardian GUDT-322
GUDT-322 is identified in the book as logic board. Its direct model listings belong to the cover dated October 1, 2024 source and require exact configuration confirmation.
Read the shared scope and cautions above
Exact pairing & sources for GUDT-322 · Conditional
GUDT-322 is listed directly under model 728B in the cover dated October 1, 2024 parts book; confirm source revision and exact configuration.
From GUDT-322 to 728B
- Source 1: GuardianGuardian replacement-parts book, cover dated October 1, 2024 · DOCX native table 45, row 4, column group 1; exact model heading 728B; assembly item 3 · checked 2026-09-12 · Cover dated October 1, 2024
- Source 2: GuardianGuardian replacement-parts book, cover dated October 1, 2024 · DOCX native table 45, row 4, column group 1; exact model heading 728B; assembly item 3; qualified-technician footnote immediately following native assembly table 45 · checked 2026-09-12 · Cover dated October 1, 2024
Guardian GUDT-349
GUDT-349 is identified in the book as dc motor. Its direct model listings belong to the cover dated October 1, 2024 source and require exact configuration confirmation.
Read the shared scope and cautions above
Exact pairing & sources for GUDT-349 · Conditional
GUDT-349 is listed directly under model 728B in the cover dated October 1, 2024 parts book; confirm source revision and exact configuration.
From GUDT-349 to 728B
- Source 1: GuardianGuardian replacement-parts book, cover dated October 1, 2024 · DOCX native table 45, row 5, column group 1; exact model heading 728B; assembly item 4 · checked 2026-09-12 · Cover dated October 1, 2024
- Source 2: GuardianGuardian replacement-parts book, cover dated October 1, 2024 · DOCX native table 45, row 5, column group 1; exact model heading 728B; assembly item 4; qualified-technician footnote immediately following native assembly table 45 · checked 2026-09-12 · Cover dated October 1, 2024
Guardian GUDT-353
GUDT-353 is identified in the book as opener cover. Its direct model listings belong to the cover dated October 1, 2024 source and require exact configuration confirmation.
Read the shared scope and cautions above
Exact pairing & sources for GUDT-353 · Conditional
GUDT-353 is listed directly under model 728B in the cover dated October 1, 2024 parts book; confirm source revision and exact configuration.
From GUDT-353 to 728B
- Source 1: GuardianGuardian replacement-parts book, cover dated October 1, 2024 · DOCX native table 45, row 7, column group 1; exact model heading 728B; assembly item 6 · checked 2026-09-12 · Cover dated October 1, 2024
- Source 2: GuardianGuardian replacement-parts book, cover dated October 1, 2024 · DOCX native table 45, row 7, column group 1; exact model heading 728B; assembly item 6; qualified-technician footnote immediately following native assembly table 45 · checked 2026-09-12 · Cover dated October 1, 2024

Guardian R2BCC
R2BCC is identified in the book as remote control. Its direct model listings belong to the cover dated October 1, 2024 source and require exact configuration confirmation.
Exact pairing & sources for R2BCC · Conditional
R2BCC is listed directly under model 728B in the cover dated October 1, 2024 parts book; confirm source revision and exact configuration.
From R2BCC to 728B
Applies only within this source scope
- Market: US
- Model scope: 728B
- Exact model 728B listing in the replacement-parts book: Cover dated October 1, 2024. Confirm the exact part and installed configuration; a listing does not establish interchangeability with another revision, model or similarly named item.
- Source 1: GuardianGuardian replacement-parts book, cover dated October 1, 2024 · DOCX native table 44, row 3, column group 1; exact model heading 728B; accessories item 2 · checked 2026-09-12 · Cover dated October 1, 2024

Guardian STDBAT
STDBAT is identified in the book as portable battery. Its direct model listings belong to the cover dated October 1, 2024 source and require exact configuration confirmation.
Exact pairing & sources for STDBAT · Conditional
STDBAT is listed directly under model 728B in the cover dated October 1, 2024 parts book; confirm source revision and exact configuration.
From STDBAT to 728B
Applies only within this source scope
- Market: US
- Model scope: 728B
- Exact model 728B listing in the replacement-parts book: Cover dated October 1, 2024. Confirm the exact part and installed configuration; a listing does not establish interchangeability with another revision, model or similarly named item.
- The source footnote for this assembly table requires replacement by a qualified technician.
- Source 1: GuardianGuardian replacement-parts book, cover dated October 1, 2024 · DOCX native table 45, row 6, column group 2; exact model heading 728B; assembly item 11 · checked 2026-09-12 · Cover dated October 1, 2024
- Source 2: GuardianGuardian replacement-parts book, cover dated October 1, 2024 · DOCX native table 45, row 6, column group 2; exact model heading 728B; assembly item 11; qualified-technician footnote immediately following native assembly table 45 · checked 2026-09-12 · Cover dated October 1, 2024

Before applying these details

The qualified-technician note applies to the 728B assembly table; it is not presented as a quotation from the installation or accessory tables.
GUAT-203 remains an alkaline-battery identity without a device pairing; GUDT-220 remains a manual item reference without a new manual URL.
A listed component does not establish that it is installed, available, interchangeable with another revision or approved as a replacement for a different part number.
The source provides part references for this exact model. Opener power rating, door capacity, dimensions and a current installation manual are not established by this parts-list review.

Sources & scope

Guardian replacement parts book (official DOCX; cover dated October 1, 2024)ADH Guardian USA LLC · checked 2026-09-12 · Cover dated October 1, 2024

Anderson prepared this independent reference from the listed sources. It is not the manufacturer’s official support site, an installation inspection or a product test. Current stock, parts availability and warranty entitlement are not established by a listing.

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Troubleshooting guides explain observations; they do not identify a failed part from a model number.

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Need service in Connecticut? Check Anderson’s listed service areas or describe your equipment and symptom. This national reference library does not imply nationwide repair coverage.