Finding the right baseboard heater knob ensures reliable temperature control and easy operation for electric and wall heaters. Below is a concise comparison of five replacement knobs chosen for fit, material, and compatibility. Each listing links to the Amazon product page for quick access.
| Product | Brand | Key Feature |
|---|---|---|
| 2PCS Baseboard Heater Thermostat Temperature Control Dial Knob | Generic | Pack of 2, D-shaped opening ~1/4″ x 5/32″ |
| Marley Engineered Products Baseboard Heater Thermostat Knob | Marley Engineered Products | OEM-style ribbed grip, single replacement |
| ZNTVW 63818002 Temp Control Knob | ZNTVW | Durable, heat resistant, precise D-hole sizing |
| GYOFFULL S99360135 Heater Knob | GYOFFULL | Replaces multiple OEM part numbers, ABS build |
| Broan S99360135 SRV Knob For Wall Heater | Broan-NuTone | O.E.M. authorized part, fits Broan models |
2PCS Baseboard Heater Thermostat Temperature Control Dial Knob Replacement
This set includes two white replacement knobs sized to match many common baseboard heater controls. The knob outer diameter is 2 inches and the D-shaped opening measures approximately 1/4″ long x 5/32″ wide, which is important for matching to the thermostat shaft. The package dimensions and light weight reflect a compact, accessory-style product suitable for left-front or right-front mounted controls.
Feature Highlights: pack includes two knobs; ribbed grip on the knob sides for easier turning; intended for front-mounted heater controls only. Fit depends on the shaft profile and D-hole orientation; verify dimensions before ordering.
Marley Engineered Products Baseboard Heater Thermostat Temperature Control Knob
This single replacement knob is offered by Marley Engineered Products and is designed to work with many baseboard heater models where the knob mounts on the front rather than the ends. The knob includes ribbed sides for improved grip, making it practical for frequent adjustments.
Feature Highlights: includes 1 knob; replacement part intended for front-mounted controls only; ribbed outer surface. The listing notes incompatibility with units featuring end-mounted knobs, so confirm mounting location before purchase.
ZNTVW 63818002 Temp Control Knob For Wall Heater
ZNTVW markets this knob as a direct repair for worn or damaged controls. The product emphasizes durability—constructed from heat-resistant, wear-resistant materials—and includes size guidance to match the D-shaped shaft opening. The vendor recommends verifying the D-hole direction and dimensions shown in images.
Feature Highlights: designed to address loose, cracked, or nonfunctional knobs; material upgrade to meet OEM standards; compact and sturdy build; clear sizing information for fit confirmation. Useful when the shaft profile matches the provided D-shaped opening.
GYOFFULL S99360135 Heater Knob Compatible With Broan
GYOFFULL lists this model as an aftermarket replacement that specifically replaces several OEM part numbers, including S99360135 and related variants. The knob is made from ABS plastic with a glossy surface finish and is marketed as meeting OEM-quality standards.
Feature Highlights: replaces multiple part numbers (AP5614013, 1172976, 99360135, 99360137, S99360137); fits specific wall space heater models like 165FT, 167FT, 170 series, and certain B-series units; durable ABS construction; glossy exterior. Check compatibility lists or the original part number to confirm fit.
Broan S99360135 SRV Knob For Wall Heater
This listing is an O.E.M. authorized part from Broan-NuTone, identified by the OEM part number S99360135. The product is promoted as a direct fit for various Broan wall heater models, which can simplify ordering when the original part number is known.
Feature Highlights: OEM-authorized replacement; designed to fit specified Broan models; OEM part number S99360135 provided for cross-reference. For installations on compatible Broan units, this part is positioned as a direct factory replacement.
Buying Guide: How To Choose The Right Baseboard Heater Knob
Selecting a replacement baseboard heater knob requires matching mechanical fit, material durability, and compatibility with your heater model. Below are practical considerations to evaluate before purchasing a knob.
1. Identify The Shaft Type And Dimensions
The most common reason a knob won’t fit is an incompatible shaft profile. Measure the shaft cross-section and compare it to the knob’s internal bore. Common profiles include:
- D-Shaped Shaft — Flat on one side and round on the other; many replacement knobs reference D-hole dimensions in fractions of an inch.
- Splined Or Serrated Shafts — Require matching splines in the knob bore; less common for basic baseboard thermostats.
- Round With Set Screw — Knobs secure with a small screw rather than a shaped bore.
Confirm the length and width of the D-hole
2. Check Mounting Location: Front vs. End
Many replacement knobs are made for front-mounted controls and will not fit units with knobs on the ends of the heater. Verify whether your heater’s knob mounts on the front face or the end panel before ordering.
3. OEM Part Number Cross-Reference
When available, use the original equipment manufacturer (OEM) part number. Products like the Broan S99360135 or GYOFFULL listings that note replacement part numbers simplify compatibility checks. If you have the original part number from the heater manual or the removed knob, match it directly.
4. Material And Durability
Common materials include ABS plastic and other heat-resistant polymers. Consider these attributes:
- Heat Resistance — Important because knobs are near warm surfaces.
- Wear Resistance — Frequent use requires a surface that resists cracking or stripping.
- Grip Design — Ribbed or textured edges aid turning, especially with gloved hands or limited dexterity.
5. Pack Size And Spare Parts
Replacement listings vary between single knobs and multi-packs. If your heater has multiple knobs or you want a backup, consider multi-piece packages like the 2PCS set. For commercial or multi-unit homes, multi-packs can reduce repeat ordering.
6. Compatibility With Specific Heater Models
Some aftermarket knobs list compatible heater model numbers or series (for example, GYOFFULL lists specific wall space heater models). Use those compatibilities to quickly determine fit, especially for older or less-common heater brands.
7. OEM Versus Aftermarket Considerations
OEM-authorized parts provide the highest assurance of fit for a given model. Aftermarket knobs may offer improved materials or cost advantages but require careful measurement and part-number checking. Decide based on:
- Confidence In Measurements — If you can precisely match shaft and bore specs, aftermarket options often work well.
- Availability Of OEM Parts — Some OEM parts are readily available and cross-referenced in listings.
8. Installation And Securing Methods
Confirm how the knob secures to the shaft. Common methods include:
- Press-Fit D-Hole — Knob slid onto shaped shaft and held by friction.
- Set Screw — Small screw tightens to secure the knob to a round shaft.
- Retaining Clip Or Pin — Less common, used in specific assemblies.
Choose a knob with the same securing method as your original to avoid additional hardware or modification.
9. Visual And Ergonomic Considerations
Color, size, and tactile design matter for user experience. White knobs match many common heater trim colors, while textured surfaces help with grip. For households with children or shared spaces, consider knobs that clearly show temperature positions for intuitive use.
10. Quality Indicators In Product Listings
Look for product details that indicate reliability, including material specifications, OEM cross-reference, and clear dimensional data. Photos that show internal bore orientation and size markers are helpful for accurate selection.
Comparison Perspectives To Weigh
When comparing options, evaluate across multiple axes:
- Fit Accuracy — OEM part numbers and exact D-hole dimensions provide the best chances of correct fit.
- Material Longevity — Heat- and wear-resistant plastics reduce the need for frequent replacements.
- Installation Simplicity — Direct press-fit or set-screw replacements minimize tools and time.
- Value — Multi-packs or aftermarket alternatives may offer cost benefits if compatibility is confirmed.
Before finalizing a purchase, double-check shaft profile, mounting location, and any listed compatible model numbers. Accurate measurements and cross-references will help ensure the replacement knob functions properly and lasts as expected.