Robertshaw Knob: Mfr Part # 4590-188
SKU 3G-OTH-74706
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Frequently Asked Questions
What is the Robertshaw 4590-188 knob used for?
The Robertshaw 4590-188 is a dial knob designed for HVACR equipment. It is commonly used as a replacement or original component on temperature controls, thermostats, and gas valves to provide precise manual adjustment of settings in commercial and industrial heating and refrigeration systems.
What are the specifications of the Robertshaw 4590-188 knob?
The Robertshaw 4590-188 is a dial-type knob with manufacturer part number 4590-188. It is classified under knobs, handles, and wheels for HVACR equipment. The product type is Dial, and it is designed for use with Robertshaw controls and compatible HVACR systems.
Where to buy the Robertshaw 4590-188 knob worldwide?
You can source the Robertshaw 4590-188 knob from 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time; we supply genuine Robertshaw components for HVACR applications.
How to install the Robertshaw 4590-188 dial knob?
To install the Robertshaw 4590-188 dial knob, align the knob's D-shaped or splined shaft opening with the control stem and press firmly until seated. Ensure the set screw (if present) is tightened against the stem's flat surface. Always verify free rotation and proper indexing before energizing the system.
Used in
Common applications for RobertshawRobertshaw Products
3G Electric supplies Robertshaw knobs, handles & wheels for hvacr equipment. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.








