Robertshaw 275 Thermostats 275-3100-04Robertshaw 275 3100 04 The Robertshaw 275 Series Electric Gas Thermostats were designed for use in conventional ovens in combination with the ignition system. Their compact design fits even in confined areas. Each of these thermostats is a highly reliable temperature control with a long operating life. The switch uses a patented push to turn function to activate the range valve or close the switch contacts. Turning on the thermostat activates the