Thermos 21003 Grill Parts

Highest quality replacement parts for your Thermos 21003 - Free USA shipping $49 or more* - No Sales Tax*

Thermos 21003 owners manual and diagrams

Diagrams & owners manual not available for grill model# 21003. If you have a manual you're willing to share, please click here to send us an email with the attached manual. Thank You!

Replacement grill parts for the Thermos model: 21003

On this page you'll find all of the parts that fit model Thermos 21003. If the part you need is not shown below, try clicking the appropriate category button on the right side of the page. For example, if your looking for a warming rack and there are none here, click the warming rack button to see all of the racks we have for Thermos grills. You will need to know the dimensions of your existing grids to help you find the right part.

To get the correct Thermos 21003 BBQ parts

You should measure your existing parts and compare them to what we show here. This is best done with them removed from the grill.
Verify your Thermos model number by checking the CSA appliance tag on your grill to make sure you have the correct model number. Do not rely solely on the owners manual as these are frequently mixed up at retail stores when the grills are assembled. You'd be surprised at how many folks have the wrong owners manual.

21003 Venturis

Click for photos

Single Gasket Kit Economy Burners

Part Number: SHK4
Weight: 0.01

Click for photos

Straight adjustable single venturi from 5 1/8” to 7”. Includes all necessary gaskets and screws/nuts.

Part Number: 70301
Material: zinc plated steel
Weight: 0.5

==> All Thermos Venturis.

21003 Cooking Grids

Porcelain steel cooking grid for Thermos model 21003. Porcelain enameled, glossy finish. Sold individually.

Part Number: 50101
Dimension Front-to-Back: 12”
Dimension Side-to-Side: 18 1/2”
Material: porcelain steel wire
Weight: 3.9

==> All Thermos Cooking Grids.

21003 Rock/Briquette Grates

Click for photos

Rock grate for holding lava rock or ceramic briquettes.

Part Number: BG-1
Dimension Front-to-Back: 11 1/4”
Dimension Side-to-Side: 18 1/4”
Material: carbon steel
Weight: 3.3

==> All Thermos Rock/Briquette Grates.

21003 Heat Plates

Heat Plate/ Flame Tamer not known for Thermos model 21003. Our parts information for this grill model is incomplete, and we really don't know with certainty which heat plate fits this model. It may be that we have the part but don't show it here due to data or other error.

If you know the original OEM part number, try searching for it in the search box at the top of this page.

You can also browse through all of the heat plates we carry for your brand grill. If we don't have the exact fit for your grill, we may have a suitable replacement part. Measure your existing part so you'll know exactly what size is needed.

If you have this grill model and know the number and dimensions of your original heat plates, click here to send an email to our GrillDr that includes this information. We greatly appreciate your help.

Part Number: HP-DUMMY
Weight: 1.0

==> All Thermos Heat Plates.

21003 Warming Racks

Click for photos

Universal warming rack. For use on grills with at least 22” inside dimension.

Part Number: AP-6A
Dimensions: 6” x 21 1/2”
Material: Chrome steel
Weight: 1.3

==> All Thermos Warming Racks.

21003 Accessories

Click for photos

Durable 2 5/16” round briquettes

Self-cleaning
Control flare-ups while holding an even heat pattern.
About 53 pieces, covers approximately 275 sq. inches.
Fits all gas grills

Part Number: BQ-5
Weight: 7.2

Click for photos

Natural lava rock processed and screened for uniformity. 7 lb. bag is enough for all full sized grills. Click the photo to find easy steps for installing lava rocks.

Part Number: 45887
Material: pummise
Weight: 7.0

Click for photos

Stainless steel flipper. The ultimate spatula tool, specially curved for perfect flips every time. 18” overall.

Part Number: SF-1
Dimensions: 18
Material: stainless steel
Weight: 0.4

Scrub brushes. Plastic grill scrubber. Cleans all types of cooking grids. Plastic grip handle.

Part Number: WB-7
Dimensions: 6” x 3 1/2”
Weight: 0.2

==> All 21003 Accessories.

BBQ Part Categories

Thermos grill model 21003 - Sunday, Jan 26 2025

Return to Thermos grills main page

More Thermos grill models we have parts for
7907 \| 7910 \| 79109B \| 79109T \| 7911 \| 79119T \| 7914 \| 79142T \| 7940 \| 7945 \| 7950 \| 7955 \| 7971 \| 7976 \| 7980 \| 7990 \| 7995 \| 85-1623-0 \| 87411 \| 87417 \| 87422 \| 87606 \| 87607 \| 87610 \| 87612P \| 87638 \| 87641 \| 87648 \| 87802 \| 87803 \| 87804 \| 87805 \| 87806 \| 87807 \| 87808 \| 87809 \| 87811 \| 87814 \| 87815 \| 87816C \| 87821 \| 88131S \| 88136S \| 88207S \| 88227S \| 88229S \| 88238 \| 88245S \| 88302A \| 88302S \| Complete list of Thermos grill models...

More Thermos grill models we have parts for

7907 | 7910 | 79109B | 79109T | 7911 | 79119T | 7914 | 79142T | 7940 | 7945 | 7950 | 7955 | 7971 | 7976 | 7980 | 7990 | 7995 | 85-1623-0 | 87411 | 87417 | 87422 | 87606 | 87607 | 87610 | 87612P | 87638 | 87641 | 87648 | 87802 | 87803 | 87804 | 87805 | 87806 | 87807 | 87808 | 87809 | 87811 | 87814 | 87815 | 87816C | 87821 | 88131S | 88136S | 88207S | 88227S | 88229S | 88238 | 88245S | 88302A | 88302S | Complete list of Thermos grill models...