Thermostat Dial Knob for 300/300L Steam Iron

The Thermostat Dial Knob for 300/300L Steam Iron helps you adjust temperature settings on compatible gravity feed bottle steam irons used in tailoring shops, garment factories, and professional pressing units. Replace a worn, loose, or damaged knob to make temperature selection easier and maintain convenient control during daily garment finishing.

This replacement thermostat control knob is designed for Model 300 and Model 300L gravity feed bottle steam irons. It provides a practical replacement for operators who need a usable temperature adjustment control without replacing the entire thermostat assembly.

Key Features of the Thermostat Dial Knob

• Temperature adjustment: Turn the knob to select the required thermostat setting on a compatible steam iron.
• Clear dial markings: The printed temperature scale and fabric indicators help you identify the intended heat setting.
• Comfortable grip: The grooved outer edge supports easy turning during regular pressing work.
• Replacement fitment: The push-on design is intended for a compatible thermostat control shaft.
• Single-piece supply: Each pack contains one thermostat dial knob for replacement or maintenance.

The knob is a control component, not a complete thermostat. It does not independently regulate temperature; the connected thermostat performs that function.

Iron Compatibility

This thermostat dial knob is intended for the following equipment:

Brand names alone do not guarantee compatibility. Check your existing knob, thermostat shaft shape, and mounting arrangement before purchasing.

Please verify the shape and measurements of your existing part before purchasing.

Which Fabrics Can You Press With This Knob?

The knob helps you select a suitable heat setting for different fabrics when used with a compatible steam iron. Fabric suitability depends on the iron’s actual temperature range and the care instructions for the garment.

• Cotton: Select an appropriate setting for shirts, uniforms, and everyday garments.
• Denim: Choose a suitable heat level for jeans and other denim garments.
• Polyester: Use a lower setting where the garment’s care label recommends it.
• Silk: Select a low-temperature setting suitable for delicate silk fabrics.
• Wool: Follow the garment’s care instructions and use an appropriate temperature.
• Linen: Select a suitable setting for linen garments and heavier fabrics.

Always check the garment care label and test an inconspicuous area when necessary. The dial knob itself does not make a fabric heat-resistant or prevent scorching.

How to Replace and Use the Thermostat Dial Knob

1. Switch off the steam iron, disconnect its power supply, and allow it to cool completely.
2. Remove the old knob carefully, following the machine manufacturer’s instructions.
3. Inspect the thermostat shaft and compare its shape with the replacement knob.
4. Align the replacement knob with the compatible shaft and fit it without forcing the connection.
5. Once installed, use the dial markings to select an appropriate temperature setting according to the garment care instructions.

If the knob does not fit securely, the shaft differs, or the thermostat control behaves incorrectly, stop and consult a qualified technician. Do not operate the iron with a loose control knob or a faulty thermostat.

Who Should Buy This Replacement Knob?

This spare part is useful for tailoring shops, garment manufacturing units, laundry businesses, alteration services, and professional ironing stations that use compatible Model 300 or Model 300L gravity feed bottle steam irons.

Replacing a damaged dial knob can restore convenient access to the existing temperature control without automatically requiring a complete thermostat replacement.

Frequently Asked Questions

1. What is a thermostat dial knob used for?

A thermostat dial knob lets you select temperature settings on a compatible steam iron. It connects to the thermostat control shaft, allowing you to turn the control and choose the required heat level.

2. Does this knob fit Model 300 and Model 300L steam irons?

It is intended for Model 300 and Model 300L gravity feed bottle steam irons. However, shaft designs can vary, so compare your existing knob and mounting arrangement before ordering.

3. Is this a complete thermostat assembly?

No. This product includes one replacement thermostat dial knob, not the thermostat switch or complete temperature control assembly.

4. Can I use this knob with Silver Star or Jack steam irons?

It may fit compatible 300/300L series models from these brands. Confirm the exact model and thermostat shaft before purchasing because brand compatibility alone does not guarantee a match.

5. Does the knob control the iron’s temperature by itself?

No. The knob allows you to adjust the connected thermostat. The thermostat controls the heating cycle and regulates the iron’s temperature.

6. How many knobs are included in the pack?

The pack contains one thermostat dial knob.

7. Can I replace the knob while the iron is hot?

No. Switch off and unplug the iron, then let it cool completely before attempting replacement. Consult a qualified technician if you cannot remove or fit the knob safely.

8. What should I check before buying a replacement?

Check the iron model, the existing knob’s shape, the thermostat shaft profile, and the mounting fit. If these details are uncertain, compare photographs or consult your equipment technician before ordering.