Robertshaw 4290-008 Gas Thermostat

The Robertshaw 4290-008 Gas Thermostat is a high-performance snap-acting hydraulic thermostat designed for heavy-duty commercial kitchen equipment. Engineered for rapid response, this Robertshaw GS series control features a 60-inch capillary tube and a 3/8" diameter nickel-plated sensing bulb, ensuring accurate temperature regulation between 60°F and 250°F. This specific model is a standard for professional contractors servicing commercial griddles, warming cabinets, ovens, and brooders. With a 30,000 BTU capacity and 3/8" pipe inlet/outlet, it integrates seamlessly with 700 and 800 series gas valves. The snap-acting mechanism provides a definitive "off" position to full gas flow, preventing the slow-modulated "creep" found in lesser controls. Built for tight mounting spaces, it includes a heat-resistant plastic dial and handles ambient temperatures up to 300°F. When reliability in commercial gas appliance repair is non-negotiable, the 4290-008 provides the precision and durability field technicians demand.

• Snap-Action Precision: Delivers immediate gas flow interruption for tighter temperature differentials in cooking equipment.
• Universal Compatibility: Fits a wide range of manufacturers and is compatible with industry-standard 700/800 series diaphragm valves.
• Extended Reach: The 60" capillary allows for flexible mounting in complex appliance configurations.
• Rugged Construction: Nickel-plated bulb and capillary resist corrosion in high-heat, high-moisture commercial environments.
• Field-Proven Reliability: High-volume 30,000 BTU rating handles the rigorous demands of commercial food service.

Is the Robertshaw 4290-008 adjustable for natural gas or LP?
This thermostat acts as a temperature-controlled switch for the gas line; however, ensure your burner orifices and regulators are correctly sized for your specific fuel type (Natural Gas or Propane) as this part is commonly used in Natural Gas configurations.

What should I do if the burner won't cycle off at the set temperature?
Check for a kinked capillary tube or a compromised sensing bulb. If the hydraulic fluid has leaked, the bellows cannot expand to snap the valve shut, leading to a runaway heat condition.

Can I use this thermostat on a heavy-duty deep fryer?
Yes, provided the temperature range (60°F–250°F) matches the application. Note that many fryers require higher ranges, so always verify the required operating temperature against the 250°F limit of this 4290 series model.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.