you say temperature switch. are you referring to the thermostat? take the cover off it and look for a slider for adjusting the cycle time. it will be calibrated in Ma or milliamperes. This is the current of your gas valve also rated in milliamperes. just match the numbers as close as you can. another name for this slider is the heat anticipator. what this does is sense the room temperature when the room's temperature approaches the set point of your thermostat and begins to throttle back the burner. it may overshoot the set point a couple of degrees but you can live with that. it then starts to cool down before the actual "stat" does and restarts your burner. the thermostat has a proportional band built into it to keep from short cycling the burner.