Installing a Robertshaw thermostat is an easy task that anyone can do. Robertshaw builds all thermostats to OEM standards -- so your replacement thermostat is identical to those used in new Fords, Chryslers, and other cars. Found inside – Page 1981 STATEMENT OF ALEXANDER H. WILSON , FOREMAN , ROBERTSHAW THERMOSTAT CO . , YOUNGWOOD , PA . Mr. Wilson . My name is Alexander H. Wilson , and I live near ... HVAC controls include valves, switches, and dampers to regulate temperature, humidity, energy, and pressure systems in commercial HVAC and refrigeration applications. ROBERTSHAW 5300-146 Elec Cook Control,Tstat,100-493 Range. Robertshaw Thermostat, BJWA Griddle/Gas Oven. Robertshaw 9520 User's Manual. Robertshaw customers – My Account is your secure access to the information you need to track orders, review invoices, and leverage a variety of sales tools. Warranty For over 100 years, Robertshaw thermostats have been synonymous with quality and reliability. When you need to repair or refurbish an electric stove, check Grainger first for . Robertshaw 5300-651 175-550 Electric Thermostat, 60" Cap Copper Honeywell Home RTH9585WF1004 Wi-Fi Smart Color Thermostat, 7 Day Programmable, Touch Screen, Energy Star, Alexa Ready 4.4 out of 5 stars 9,543 The ROBERTSHAW® gas cooking control, or thermostat, is a replacement thermostat for natural gas and LP gas ovens. This is an excellent solution for spaces that don’t require complex heating and cooling. item 7 Robertshaw RS1110 5-1-1 Day Digital Programmable Thermostat, 1 Heat/1 Cool 7 - Robertshaw RS1110 5-1-1 Day Digital Programmable Thermostat, 1 Heat/1 Cool $25.99 Free shipping Make sure wire connections are secure. Only 10 left in stock - order soon. Drill in place of mounting holes and secure the body to the wall. Robertshaw has been around since the 19th Century. • Accuracy within ± 1 degree. HI will be. Thus, the company is truly the father of all thermostats. To lock or unlock the thermostat, press and hold the NEXT and RETURN buttons together for 5 seconds (Figure 1).The screen will change, displaying 000 and LOCK will be flashing (Figure 2). WARNING: This product may contain chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. thermostat. • Fahrenheit/Celsius display option. $. We’re ready to help you with all of your Robertshaw product questions and concerns. When we discovered a hat modification and plate was sold for $125.65 without the thermostat we thought there has to be a more economical way. We designed an alternative sized bypass that will utilize the Robertshaw 330 series hi flow thermostat in the existing 351C controlled bypass system. Easy to install. $75.00. FlowKooler Robertshaw Series High Performance Thermostats. Found inside – Page 310... CO PHILADELPHIA PA ROBERTSHAW THERMOSTAT CO YOUNGWOOD PA NOW ROBERTSHAW FULTON CONTROLS CO ROCHE AND HULL INC APPLIANCE CORP BALTIMORE мо FORMERLY PARKS ... Found inside – Page 370In 1907 , Robertshaw Thermostat Co. at Youngwood , Pa . , began production of water - heater thermostats which had been developed in 1900 by Mr. F. W. ... • Low battery indicator. With other thermostats, the bypass valve stem is welded on. $0 Shipping. Gas Valve,Fast Opening,300,000 BtuH ROBERTSHAW 700-406. RS5110 single stage and the RS5220 two stage thermostats. Most manufacturers use a one-piece rubber diaphragm to seal the charge and drive the piston. Found inside – Page 24149. Bell Aircraft Corp --- Includes American Wheelabrator & Equipment Co. ( 73 ) . 150. Robertshaw - Fulton Controls Co. Includes Robertshaw Thermostat Co. Push excess wire back through opening. As an Amazon Associate we earn from qualifying purchases. 95 FlowKooler Robertshaw high performance thermostats are designed to resist large variations in coolant pressures that can occur at high rpm. Robertshaw continues to develop ground-breaking solutions that make products more effective, more efficient, and more attainable. A single trick that We 2 to print a similar wiring picture off twice. Determine your type of furnace on the ELEC-GAS switch. With the comfort, convenience, and efficiency features that homeowners and contractors want, the RS4000 family provides custom program options in value-packed thermostats for an affordable price . Today, Robertshaw thermostats are still leading the industry with key features like a balanced pressure feature that allows equal water pressure on both sides of the thermostat even before the thermostat has fully opened. Found inside – Page 80SEE Robertshaw - Fulton Controls Company Model DP gas thermostat . ... throttling type gas thermostat for gas heated coffee urns and coffee makers . This enables the thermostat to respond to temperature only, better controlling engine and cooling system temperatures. Robertshaw makes the thermostat's strut assembly from brass, not stainless steel, because brass can be bradded to the housing with heat instead of sledge hammer-like stress. Found inside – Page 215Robertshaw Thermostat Co. Rockford Mitten & Hosiery Co. , Rockford , Ill . 500,509 , Robertshaw Thermostat Company . canc . Ci , 39 . Robertshaw - Fulton ... Some like it hot, some like it cold and others like it somewhere in between. When installing or maintaining electronic devices in your home, make sure to observe the manufacturers instructions at all times. Place batteries into the battery compartment of the body. Click, call or email. . Here are some of them: If you’re convinced your thermostat is not showing you the right temperature, you’re probably right! The weld tends to fail under stress. Temperature controls maintain a desired setpoint . Or, if your model is not listed, leave a comment below. Other brands mix copper powder with the wax for faster response, but the copper quickly separates from the wax. Depending on the thermostat type, the model number will either be printed on the back of the face plate or will be accessible through the user interface (Main Menu > Tech Support). Rubber material for each part is formulated especially to meet each part's unique requirements. Found inside – Page 573Robertshaw , Frederick W. , Pittsburgh , assignor to Robertshaw Thermostat Company , Youngwood , Pa . Thermostat . 1,567,081 ; Dec. 29 . Robertshaw , George ... The Robertshaw non-programmable thermostat can work with gas or oil-fired boilers, gas or oil-forced air furnaces, single-stage heat pumps with no auxiliary heat, electric furnaces and single-stage air conditioners. 18 List List Price $38.20 $ 38 . Other Features of a Robert Shaw Thermostat: 1) Stress-free construction. The Robertshaw 8400 is a single-stage thermostat designed to control 24 VAC gas or electric heating and cooling systems or single-stage heat pump. Robertshaw even expanded to automotive temperature and fluid controls! Each model has its own product manual and set of troubleshooting steps. You will see the number of the model in the top left corner. We start by recruiting the best engineering minds in the climate control industry. Knowledge about robertshaw gas valve wiring diagram has been uploaded by Benson Fannie and tagged in this category. Installing a Robertshaw thermostat is an easy task that anyone can do. Found inside – Page 506Electrical circuit for twin element models – Robertshaw 'ST' thermostats ... is for Robertshaw 'ST' thermostats Robertshaw 'ST' adjustable thermostat single ... It detects minute changes in the temperature of the coolant, and quickly activates a precision-engineered stem or piston to open and close the thermostat valve. 57.59. Product Image. Any suggestions? Product Image Feedback ROBERTSHAW. Found inside – Page 346R. Forrester , Wilcolator Company Elizabeth 3 , New Jersey F. H. Post Robertshaw Thermostat Division Robertshaw - Fulton Controls Co. This environmentally safe, mercury-free thermostat . When you install the thermostat, you will see installation instructions on the screen. This design increases the longevity of the thermostat, yet still allows adequate coolant circulation. This user's manual will guide you through the setup of the. Robertshaw Thermostat 300-206 Operating instructions (2 pages) 10. But the long stroke compromises durability. Found inside – Page 177Advantages of the Robertshaw Balanced Thermostat • Fast response to temperature changes . • Unaffected by pressure changes . Self - cleaning design prevents ... and 95ºF (7ºC and 35ºC). Remember, all thermostats are different. Each has its own benefits and target audience. Found inside – Page 215Robertshaw Thermostat Co. Rockford Mitten & Hosiery Co. , Rockford , Ill . 500,509 , Robertshaw Thermostat Company . canc . C1 . 39 . Robertshaw - Fulton ... My Robertshaw 9600 thermostat indicates 99 degrees, when the room temp is actually in the low 60's and falling. After you’ve installed your thermostat, you need to program it. Download Operation & user's manual of Robertshaw 9500 Thermostat for Free or View it Online on All-Guides.com. Why Robertshaw? The Robertshaw thermostat enhances the performance of the cooling system, using any style of water pump. If these steps do not work for you, check your model’s manual. I have a robertshaw programmable thermostat 9610. lo battery. So many kinds of controls factor into cooking applications, and Robertshaw® expertly designs them all: thermostats, regulators, gas valves, infinite switches, limit controls, burners, and complementary components. This site is owned and operated by Origin8 Tech Limited. Robertshaw Thermostat Company was a company that build gas valves to control water temperature. 6) Uniform quality. Robertshaw is a manufacturer of thermostats, zone controls, valves, timers, and other electronic HVAC control components. When you make use of your finger or stick to the circuit with your eyes, it is easy to mistrace the circuit. Therefore the thermostat is pressure balanced and will respond to system temperatures only. No other thermostat does this. Manufacturer Item Subbase 9700 i Carrier TSTATCCPRH01 9700i TSTATCCPF701 9700i TSTATCCPF101 9700i TSTATCCPS101 9700i TSTATCCPS701 9700i TSTATCCPAC01 9700i Because we make a hi flow pump and its unique three port construction or "balanced sleeve" design equalizes the system pressures above and below the thermostatâs moving valve. My thermostat is over 30 years old. Found inside – Page 6135( at Knoxville ) , Robertshaw Thermostat Co. , Grayson Heat Control , Ltd. ( Lynwood , Calif . ) , Bridgeport Thermostat Co. ( Bridgeport , Conn . ) ... FlowKooler Robertshaw high performance thermostats are designed to resist large variations in coolant pressures that can occur at high rpm. ROBERTSHAW HVAC Controls and Thermostats. Press SET and continue until you’re done with all 4 events. Use My Account anytime, anywhere on any device. It could also be the result of drained batteries. This thermostat can be programmed between 45ºF. To solve that, seal the wall cavities and place any lamps far away from the thermostat. 2) Reliable performance. Sadly Robertshaw no longer manufactures the 370 series in all temperatures. The difference between the 370 Series and the 330 Series was the flange diameter. Necessity is the mother of invention so we designed an interface ring that allows you to size up your 330 and get the benefit of high flow. I after I removed my old thermos. Compared to the thermal elements in some thermostats, Robertshaw's Power Pill® has major advantages: 1) Rapid response. Other manufacturers forcefully attach the struts to the housing with intense, metal-weakening pressure on the struts, binding each strut in only one spot.2) The Power Pill®. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features Press Copyright Contact us Creators . Making the strut assembly from brass instead of steel provides another benefit: brass, being more malleable than steel, can be precisely formed to maximize coolant flow. Robertshaw engineers achieved a shorter stroke with a uniquely-designed flange and poppet. All imagery and manuals are copyright © Robertshaw. $74.07. I actually have the manual…somewhere. Here are some tips: Most thermostats encounter similar issues. Gas Cooking Control, Gas Type NG/LP, Dial Range 150 to 550, Bulb Size 3/16 in x 14-3/4 in . Free shipping. Only 4 left in stock - order soon. However, my Robertshaw Thermostat (which, I believe it is the same model BJWAZ as you possess/own) which I purchased brand new approximately 6-7 years ago for my OK&M, now appears to be leaking gas/propane out of the front/dial (which does not make any sense [at least to me], as when I unhooked my OKM from my old house/gas line, everything . Robertshaw engineers achieved a shorter stroke with a uniquely-designed flange and poppet. These high-flow thermostats are recommended for any performance applications and work well with high-output water pumps. Robertshaw Thermostat 200-901 Installation instructions (2 pages) 9. 3) Precise performance. The bypass design controlled the water flow and temperature with less cycling and increased the flow to the radiator for improved cooling performance.  It was an ideal solution for overheating 351C found in mustangs and hot Panteras.Â, The OE Robertshaw thermostats for the OE bypass is available again. Its made in the USA. Yes this is a real Robertshaw 333 series. If you want 160 degree alternative, consider the 333-substitute, The substitute performs the same preheat function but we resized the bypass hole for more temperature options. Â. 48" Capillary, Commercial Gas Thermostat (150°F to 550°F) 4200-005 48" Capillary, Commercial Gas Thermostat (150°F to 550°F) SKU: 4200-005 Robertshaw. Brand: Robertshaw. Found inside – Page 303Many Munition Products Other items Robertshaw has been producing and is producing ... John A. Robertshaw , president of the Robertshaw Thermostat Company of ... Robertshaw 9615 Programmable Thermostat with the cover off To set the date, time, and other defaults: Step 1: Press and release both the SET and PROG/MAN buttons simultaneously. Thermostat wiring robertshaw 9520 arcoaire ebp1800b doityourself com community forums diagrams 9600 user manual page 11 12 7000 der derhc series wire diagram manualzz wards full version hd quality outletdiagram domenicoaiellocasamuseo it products 5600 311 introducing invensys s new range of water heating thermostats st hot heater robert shaw gegypa76 痞客邦 c to 780 715 icu 9700 honeywell . The Robertshaw® RS332PE Premier Programmable Series of thermostats are designed for new and replacement commercial or residential applications. Model Number S-23-48. It detects minute changes in the temperature of the coolant, and quickly activates a precision-engineered stem or piston to open and close the thermostat valve.3) One-piece bypass poppet. Also for: Rs, Rs, Rs, Rs, Rs Installing the Robertshaw Thermostat Base NOTE: For new installations, mount the thermostat on an inside wall, five feet above the floor. Its job: to detect minute changes in the temperature of the coolant, and to quickly activate a precision-engineered piston that opens and closes the thermostat valve. There is a wide range of features and controls each model has. robertshaw manufacturer/supplier, China robertshaw manufacturer & factory list, find qualified Chinese robertshaw manufacturers, suppliers, factories, exporters & wholesalers quickly on Made-in-China.com. In conventional thermostats, the piston must make a large stroke to open the thermostat far enough for adequate coolant flow. Robertshaw builds all thermostats to OEM standards -- so your replacement thermostat is identical to those used in new Fords, Chryslers, and other cars. Found inside – Page 198STATEMENT OF ALEXANDER H. WILSON , FOREMAN , ROBERTSHAW THERMOSTAT CO . , YOUNGWOOD , PA . Mr. Wilson . My name is Alexander H. Wilson , and I live near ... The large LCD display makes reading the temperature easy and accurate. If you have a manual you would like to list, submit it here. Robertshaw® has been creating and implementing innovative solutions throughout its history. They are incredibly popular, and very well-regarded, and for good reason. Place the switch into HEAT position and press SET to program the first event of the week. Wiring diagram to wire a to replace White Rogers Model 1F The White . The quality remains the same, as each model is compatible with gas and electric furnaces, and heat pumps. Disclaimer: You are responsible for your own safety. The Power Pill's piston is activated by a temperature-sensitive mixture of metallic powder and wax. In order to troubleshoot a Robertshaw thermostat, the model number must be determined. Found inside – Page 679Mr. Robertshaw began to manufacture the thermostat and it was not long before the Mansfield Company did not have room enough to take care of his operations ... Never undertake a task you are not competent in performing and if in any doubt, we recommend you utilize the services of an insured professional. RS4110, RS5110, RS6110, RS4220, RS5220, RS6220, 352-00056-001. The Power Pill's piston is activated by a temperature-sensitive mixture of metallic powder and wax. Collection of robertshaw thermostat wiring diagram. $100.00. It needs to be replaced (temperature readings aren’t ever correct). Free shipping. Category: Thermostat. Some thermostats use an all-wax charge, which responds slowly to temperature changes. Count on Grainger for replacement stove thermostats and other electric appliance controls. Roll over image to zoom. If the rubber part ruptures, the thermostat fails. Robertshaw 200-901. ROBERTSHAW Electric Appliance Controls. Found insideARMY E NAVY " Proud of the Achievement of the Men and Women of the Robertshaw Thermostat Company " Robert P. Patterson Under Sec'y of War Years of precision ... Robertshaw 300-206. Robertshaw® has been creating and implementing innovative solutions throughout its history. A Robertshaw Thermostat is a type of thermostat, from the Robertshaw brand. Found inside – Page 2051ROBERTSHAW THERMOSTAT COMPANY , a Pennsylvania Corporation , having a ... Thermostatic Water Mixers , Thermostatic Valves , Thermostatic Systems of ... Found inside – Page 14For example , on ovens equipped with Robertshaw throttling type controls ( fig . 11 ) and on which the pilot gas line emanates from the thermostat , pilot ... Simply remove your bypass and tap the new bypass into the counter-bore until it seats and install the 330 series. Thatâs all there is to it.Â. For now, I really only need an instruction manual. Only 1 left in stock - order soon. 20 Robertshaw Thermostat 200-605 Installation instructions (2 pages) 8. If you buy through links on our site, we may earn a small affiliate commission at no extra cost to you. The. Room thermostats control temperatures in residential or commercial applications. The model list of applications for this thermostat series is so extensive it cannot be part of the search functionality. 2. Robertshaw Commercial Warmer Electric Thermostat Part Number 5300-041. I have robert shaw 9520 thermostat I want to replace with a honeywell rct8103 thermostat. To make life easy, we've collated a list of the most requested Robertshaw thermostat manuals to help you re-establish control of your home climate! Other manufacturers forcefully attach the struts to the housing with intense, metal-weakening pressure on the struts, binding each strut in only one spot. or 110/220V baseboard electric heating systems. Take off the battery compartment to see that everything looks good. Robertshaw developed a process to maintain suspension of the copper powder in the wax, so the fast response doesn't deteriorate and the thermostat will not "stick-open" to cause the engine to run cool. In fact, Frederick W. Robertshaw invented the thermostat as we know it in 1899. The weld tends to fail under stress. FlowKooler Robertshaw Series High Performance Thermostats. The Premier models are new and modern. $335.64. To accurately troubleshoot your thermostat, you need to find the right manual which means you need to know the correct model number. This design increases the longevity of the thermostat, yet still allows adequate coolant circulation.5) Contoured strut. Follow these simple steps to get on the right track. Found inside – Page 370In 1907 , Robertshaw Thermostat Co , at Youngwood , Pa . , began production of water - heater thermostats which had been developed in 1900 by Mr. F. W. ... I have a robertshaw programmable thermostat 9610. lo battery indicator came on. At the heart of a Robertshaw thermostat is the power pill. Found inside – Page 143Code Name " Robertshaw Fulton Controls Co. - Continued Successor to Robertshaw Thermostat Co. , Youngwood , Pa . Affiliated with Reynolds Metals Co. This might happen because the temperature differential is too small. Robertshaw continues to develop ground-breaking solutions that make products more effective, more efficient, and more attainable. Get detailed product tech specs, cross references, and critical installation guides – all designed to help you work more efficiently. Found inside – Page 59Bell Aircraft Corp .-- . Includes American Wheelabrator & Equipment Co. ( 73 ) . 150. Robertshaw - Fulton Controls Co. Includes Robertshaw Thermostat Co. Robertshaw Thermostat Instructions. The temperature should return to normal. Found inside – Page 218The Robertshaw Thermostat Company , which produces thermostats for every ... namely , the famous Robertshaw oven temperature control , which is in use in ... If you have any ques-tions, call Robertshaw technical support at 1-800-445-8299. Found inside – Page 24149. Bell Aircraft Corp ... Includes American Wheelabrator & Equipment Co. ( 73 ) . 150. Robertshaw - Fulton Controls Co.Includes Robertshaw Thermostat Co. Robertshaw continues to develop ground-breaking solutions that make products more effective, more efficient, and more attainable. Features • Low battery indicator • Large backlit display • Adjustable temperature differential: 1°F to 3.0°F (0.5°C to 1.5°C) Sensi Amazon Link - https://amzn.to/356x277 AA Lithium Rechargeables - https://amzn.to/3fT5XN0 (Last 5+ years on 1 charge)AA Lithium Energizers - https://amz. Product Title. The Robertshaw 8400 is a single-stage thermostat designed to control 24 VAC gas or electric heating and cooling systems or single-stage heat pump. Increase the temperature differential to avoid rapid changes. The buttons on the thermostats can be locked. Making the strut assembly from brass instead of steel provides another benefit: brass, being more malleable than steel, can be precisely formed to maximize coolant flow.6) Uniform quality. temperatures from 30ºF to 99ºF (0ºC and 37ºC). Fits Mopar, (some) Ford, Lincoln, Mercury, AMC L6 Buick Nailheads and IHC blocks, Robertshaw 330 series hi flow balanced sleeve thermostat, electra gran sport , invicta, lesabre, riviera, skylark wiildcat, electra gran sport , invicta, lesabre, riviera, wiildcat. Type: Operation & user's manual for Robertshaw 9520. 5) Contoured strut. One thing they have in common is quality. The HEAT-OFF-COOL should be on OFF. Robertshaw uses two separate parts: a diaphragm to seal the wax, and a stem seat or plug that drives the piston. New Robertshaw 110-325 Gas Water Heater Thermostat Valve 110HCT 110TS 25-236-021. This is a direct replacement for the Robertshaw 300 series programmable products. Press SET and use the arrows to select the HOURS. Robertshaw continues to develop ground-breaking solutions that make products more effective, more efficient, and more attainable. This has a beautiful new backlight and secondary display for the remote sensor bus. Rubber material for each part is formulated especially to meet each part's unique requirements. Tried changing the batte … read more Found inside – Page 19596 Robertshaw Thermost at Co. . . . . . . . . . . . . . . . . . . . . 152 REGULATORS-Automatic Water and Oil Level ... 96 Robertshaw Thermostat Co. WiFi Touch Screen Programmable Thermostat for Electric Radiant Floor Heating System, Dual Sensing and Dual Voltage Capabilities, Plus Floor Sensor. Other brands mix copper powder with the wax for faster response, but the copper quickly separates from the wax. Robertshaw 370 series substitute hi flow balanced sleeve thermostat. The Power Pill At the heart of a Robertshaw thermostat is the power pill. Robertshaw® has been creating and implementing innovative solutions throughout its history. . Robert Shaw Thermostat Wiring Diagram from www.thermostatforums.com. For quick and easy reference, Four Seasons has compiled this thorough tutorial. Robertshaw RS10420T Pro Series 7-Day Wi-Fi Programmable Touchsreen Thermostat, Up to 4 Heat / 2 Cool Heat Pump Or Up to 2 Heat / 2 Cool Multi-Stage Conventional 5.0 out of 5 stars 1 $79.95 $ 79 . Robertshaw 370-160 series hi flow balanced sleeve thermostat, The Robertshaw 370-160 series is back ! If these steps do not work for you, check your model's manual. Wear or damage to the stem seat still allows the thermostat to operate satisfactorily.3) Precise performance. This is the heart of a Robertshaw thermostat. $7.95 shipping. Furnace is not heating, presumably because t-stat is satisfied. It can sometimes be difficult to find the correct instruction manual for your device, particularly for older, discontinued models. Depending on whether or not you’re using a heat pump, place the switch into HP or NON_HP. Found inside – Page 23( Report Co. , Robertshaw Thermostat 56 ) app . WSB 9/52 . Div . USA - C Kelsey - Hayes Wheel Co. ( prod . McKeesport , Pa . 2/1/52 1,200 1274 - prod . Under these conditions, coolant temperature and pressure fight for control of the thermostat, keeping it from opening at its designed temperature. All of the product manuals and step-by-step guides are available on the official Robertshaw website. Found insideYOUNGWOOD : Robertshaw - Fulton Controls Co. , A. T. Collins , Jr .--- 7211 . Robertshaw Thermostat Division . RHODE ISLAND BRISTOL : United States Rubber ... Only 5 left in stock - order soon. Average Rating: ( 0.0) out of 5 stars. In 1947, a merger of related thermostat companies within Reynold Metals Company formed the new company, Roberthaw-Fulton Controls Company . With over 300,000 units in stock, we carry many heat pumps, ductless room air conditioners, portable air conditioners, dehumidifiers, ductless mini splits, PTAC and heating and cooling accessories for domestic or commercial use. Found inside – Page 1938Robertshaw thermostat bers and breaking strength of cotton for automatic temperature control yarns . Sheet , 171 by 81 in . 45821 of domestic appliances . Wiring Diagrams. Lux Pro Thermostat Manuals & Troubleshooting, White Rodgers / Emerson Thermostat Instruction Manuals, Totaline Thermostat – Models, Manuals & Troubleshooting, Braeburn Thermostat Instructions & Manuals, 2-Heat / 1-Cool 7 Day / 5-1-1 Day Programmable & Non-ProgrammabIe Thermostat. Alibaba.com offers 1636 robertshaw thermostat products. EMP Stewart custom thermostats are manufactured by Robert Shaw and modified by EMP Stewart. Robertshaw developed a process to maintain suspension of the copper powder in the wax, so the fast response doesn't deteriorate and the thermostat will not "stick-open" to cause the engine to run cool.2) Reliable performance.